Title: Denver to Sofia cheap flights from $339 (DEN to SOF) - Expedia.com ![](https://images.trvl-media.com/place/6097820/e84c7119-8c1f-4bb6-91b5-7cb881e80956.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/6097820/e84c7119-8c1f-4bb6-91b5-7cb881e80956.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # $339 Cheap Flights from Denver (DEN) to Sofia (SOF) [View $339 flight on Sun, Oct 11, 2026](https://expedia.com/Flights-Search?trip=oneway&leg1=from:DEN,to:SOF,departure:10/11/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:338.70&airProductToken=AQpmCjEIwoIBEgMyMTgYg2kg64kBKIiYmgMwn5yaAzhPQABYAWoFTk9CQUdyCE9MWDlDOUJWCjEIwoIBEgM4OTIY64kBINIrKPGdmgMwtJ-aAzhPQAFYAWoFTk9CQUdyCE9MWDlDOUJWEgoIARABGAEqAkJBGAEiBAgBEAEoAigDMA0) ## Popular airlines from Denver Intl. Airport (DEN) to Sofia Airport (SOF) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_OS.svg) Austrian Airlines [](https://www.expedia.com/Flights-Search?leg1=from:DEN,to:SOF,departure:4/21/2026TANYT&leg2=from:SOF,to:DEN,departure:4/28/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"OS"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_LH.svg) Lufthansa [](https://www.expedia.com/Flights-Search?leg1=from:DEN,to:SOF,departure:4/21/2026TANYT&leg2=from:SOF,to:DEN,departure:4/28/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"LH"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AC.svg) Air Canada [](https://www.expedia.com/Flights-Search?leg1=from:DEN,to:SOF,departure:4/21/2026TANYT&leg2=from:SOF,to:DEN,departure:4/28/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AC"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_TK.svg) Turkish Airlines [](https://www.expedia.com/Flights-Search?leg1=from:DEN,to:SOF,departure:4/21/2026TANYT&leg2=from:SOF,to:DEN,departure:4/28/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"TK"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_KL.svg) KLM [](https://www.expedia.com/Flights-Search?leg1=from:DEN,to:SOF,departure:4/21/2026TANYT&leg2=from:SOF,to:DEN,departure:4/28/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"KL"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AF.svg) Air France [](https://www.expedia.com/Flights-Search?leg1=from:DEN,to:SOF,departure:4/21/2026TANYT&leg2=from:SOF,to:DEN,departure:4/28/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AF"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_LX.svg) Swiss International Air Lines [](https://www.expedia.com/Flights-Search?leg1=from:DEN,to:SOF,departure:4/21/2026TANYT&leg2=from:SOF,to:DEN,departure:4/28/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"LX"}}]) - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__notification.svg) ### Be in the know Get alerts if flight prices drop or rise\* - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Book smarter Save up to 30% on select hotels after you book a flight\* - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__trophy.svg) ### Earn twice Earn your airline miles on top of our OneKeyCash [Learn about One Key](https://www.expedia.com/welcome-one-key) ## Cheap Flights from Denver to Sofia (DEN-SOF) Prices were available within the past 7 days and start at $339 for one-way flights and $676 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip ![Turkish Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/TK.gif) Thu, Sep 10 - Tue, Sep 22 DEN Denver SOF Sofia $676 Roundtrip found 4 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:DEN,to:SOF,departure:9/10/2026TANYT&leg2=from:SOF,to:DEN,departure:9/22/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:675.03&airProductToken=AQpdCiwI1JYBEgMyMDIYg2kgyJwBKJG8lwMw0sGXAzhXQABYAWoCUFNyBldWM1hQQwotCNSWARIEMTAyORjInAEg0isou8KXAzCLw5cDOFdAAVgBagJQU3IGV1YzWFBDCl0KLQjUlgESBDEwMjgY0isgyJwBKOu5mAMwxbqYAzhXQABYAWoCUFNyBldWM1hQQwosCNSWARIDMjAxGMicASCDaSihvJgDMJnCmAM4V0ABWAFqAlBTcgZXVjNYUEMSCggBEAEYASoCVEsYASIECAEQASgCKAMoBDAB) ![Turkish Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/TK.gif) Thu, May 7 - Sat, Jun 6 DEN Denver SOF Sofia $716 Roundtrip found 1 day ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:DEN,to:SOF,departure:5/7/2026TANYT&leg2=from:SOF,to:DEN,departure:6/6/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:715.23&airProductToken=AQpdCiwI1JYBEgMyMDIYg2kgyJwBKNGyjAMwkriMAzhQQABYAWoCUFNyBlBWM1hQQwotCNSWARIEMTAyORjInAEg0iso-7iMAzDLuYwDOFBAAVgBagJQU3IGUFYzWFBDCl0KLQjUlgESBDEwMjgY0isgyJwBKOv6jgMwxfuOAzhXQABYAWoCUFNyBldWM1hQQwosCNSWARIDMjAxGMicASCDaSih_Y4DMJmDjwM4V0ABWAFqAlBTcgZXVjNYUEMSCggBEAEYASoCVEsYASIECAEQASgCKAMoBDAB) ![Turkish Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/TK.gif) Sat, Apr 11 - Sat, Apr 18 DEN Denver SOF Sofia $756 Roundtrip found 11 hours ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:DEN,to:SOF,departure:4/11/2026TANYT&leg2=from:SOF,to:DEN,departure:4/18/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:755.23&airProductToken=AQpdCiwI1JYBEgMyMDIYg2kgyJwBKJGOigMw0pOKAzhQQABYAWoCUFNyBlBWM1hQQwotCNSWARIEMTAyORjInAEg0isou5SKAzCLlYoDOFBAAVgBagJQU3IGUFYzWFBDCl0KLQjUlgESBDEwMjgY0isgyJwBKMvTigMwpdSKAzhQQABYAWoCUFNyBlBWM1hQQwosCNSWARIDMjAxGMicASCDaSiB1ooDMPnbigM4UEABWAFqAlBTcgZQVjNYUEMSCggBEAEYASoCVEsYASIECAEQASgCKAMoBDAB) ![Lufthansa](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LH.gif) Tue, Sep 8 - Tue, Sep 15 DEN Denver SOF Sofia $768 Roundtrip found 5 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:DEN,to:SOF,departure:9/8/2026TANYT&leg2=from:SOF,to:DEN,departure:9/15/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:767.73&airProductToken=AQprCjMIzJABEgM0ODEYg2kgjBUo16OXAzCgqJcDOExAAFgBaghFQ09MSUdIVHIITExJOTBVQlEKNAjMkAESBDE3MDQYjBUg0iso-aqXAzDsq5cDOExAAVgBaghFQ09MSUdIVHIITExJOTBVQlEKawo0CMyQARIEMTcwNxjSKyCMFSi-6ZcDMLbqlwM4TEAAWAFqCEVDT0xJR0hUcghMS0k5MFVCUQozCMyQARIDNDgwGIwVIINpKKHslwMwofGXAzhMQAFYAWoIRUNPTElHSFRyCExLSTkwVUJREgoIARABGAEqAkxIGAEiBAgBEAEoAigDKAQwCw) ![Air Canada](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AC.gif) Sat, Oct 10 - Thu, Oct 22 DEN Denver SOF Sofia $775 Roundtrip found 5 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:DEN,to:SOF,departure:10/10/2026TANYT&leg2=from:SOF,to:DEN,departure:10/22/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:774.93&airProductToken=AQqaAQoyCMGGARIEMTAzOBiDaSCYzgEoyoyaAzCJjpoDOExAAFgBagVCQVNJQ3IITExJOTBUQlEKMQjBhgESAzgzNhiYzgEgjBUo2ZaaAzC5mpoDOExAAVgBagVCQVNJQ3IITExJOTBUQlEKMQjBhgESBDk2MDIYjBUg0isok5uaAzCGnJoDOExAAVgBagVCQVNJQ3IITExJOTBUQlEKmQEKMQjBhgESBDkwNDEY0isgpQQo8ombAzCIi5sDOExAAFgBagVCQVNJQ3IITEtJOTBVQlEKMQjBhgESAzgzORilBCC4jQEoj4ybAzD2kJsDOExAAVgBagVCQVNJQ3IITEtJOTBVQlEKMQjBhgESAzU3Nhi4jQEgg2ko0JGbAzCCk5sDOExAAVgBagVCQVNJQ3IITEtJOTBVQlESDAgBEAEYASoCQUMyABgBIgQIARABKAIoAygEMA0) ![Air Canada](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AC.gif) Sat, Oct 10 - Thu, Oct 22 DEN Denver SOF Sofia $776 Roundtrip found 5 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:DEN,to:SOF,departure:10/10/2026TANYT&leg2=from:SOF,to:DEN,departure:10/22/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:775.83&airProductToken=AQqaAQoyCMGGARIEMTAzOBiDaSCYzgEoyoyaAzCJjpoDOExAAFgBagVCQVNJQ3IITExJOTBUQlEKMQjBhgESAzgzNhiYzgEgjBUo2ZaaAzC5mpoDOExAAVgBagVCQVNJQ3IITExJOTBUQlEKMQjBhgESBDk2MDIYjBUg0isok5uaAzCGnJoDOExAAVgBagVCQVNJQ3IITExJOTBUQlEKmgEKMQjBhgESBDk1MjQY0isgjBUo84ybAzDrjZsDOExAAFgBagVCQVNJQ3IITEtJOTBVQlEKMgjBhgESBDk0MzMYjBUguI0BKNmOmwMwu5ObAzhMQAFYAWoFQkFTSUNyCExLSTkwVUJRCjEIwYYBEgM1NzgYuI0BIINpKMKUmwMw9JWbAzhMQAFYAWoFQkFTSUNyCExLSTkwVUJREgwIARABGAEqAkFDMgAYASIECAEQASgCKAMoBDAN) ![Lufthansa](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LH.gif) Tue, Sep 8 - Tue, Sep 15 DEN Denver SOF Sofia $779 Roundtrip found 5 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:DEN,to:SOF,departure:9/8/2026TANYT&leg2=from:SOF,to:DEN,departure:9/15/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:778.13&airProductToken=AQprCjMIzJABEgM0ODEYg2kgjBUo16OXAzCgqJcDOExAAFgBaghFQ09MSUdIVHIITExJOTBVQlEKNAjMkAESBDE3MDQYjBUg0iso-aqXAzDsq5cDOExAAVgBaghFQ09MSUdIVHIITExJOTBVQlEKdwpACMyQARIEMTcwNRjSKyCMFSjZ75cDMNHwlwM4TEAAWAFqCEVDT0xJR0hUcghMS0k5MFVCUXoKCMOYARIEMTcwNQozCMyQARIDNDgwGIwVIINpKMH3lwMwwfyXAzhMQAFYAWoIRUNPTElHSFRyCExLSTkwVUJREgoIARABGAEqAkxIGAEiBAgBEAEoAigDKAQwCw) ![Lufthansa](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LH.gif) Tue, Sep 8 - Tue, Sep 15 DEN Denver SOF Sofia $780 Roundtrip found 5 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:DEN,to:SOF,departure:9/8/2026TANYT&leg2=from:SOF,to:DEN,departure:9/15/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:779.43&airProductToken=AQprCjMIzJABEgM0NDcYg2kgpQQorKSXAzDrqJcDOExAAFgBaghFQ09MSUdIVHIITExJOTBVQlEKNAjMkAESBDE0MzAYpQQg0iso5KyXAzDmrZcDOExAAVgBaghFQ09MSUdIVHIITExJOTBVQlEKawo0CMyQARIEMTcwNxjSKyCMFSi-6ZcDMLbqlwM4TEAAWAFqCEVDT0xJR0hUcghMS0k5MFVCUQozCMyQARIDNDgwGIwVIINpKKHslwMwofGXAzhMQAFYAWoIRUNPTElHSFRyCExLSTkwVUJREgoIARABGAEqAkxIGAEiBAgBEAEoAigDKAQwCw) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Sun, Nov 8 - Mon, Nov 16 DEN Denver SOF Sofia $787 Roundtrip found 1 day ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:DEN,to:SOF,departure:11/8/2026TANYT&leg2=from:SOF,to:DEN,departure:11/16/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:786.13&airProductToken=AQpsCjQI1YIBEgQ5NDU4GINpIIwVKLjSnAMw99acAzhMQABYAWoIRUNPQkFTSUNyCExMSTkwVEJRCjQI1YIBEgQ5MTM0GIwVINIrKMbZnAMwtNqcAzhMQAFYAWoIRUNPQkFTSUNyCExMSTkwVEJRCmwKNAjVggESBDkyNjkY0isgpQQouqOdAzDVpJ0DOExAAFgBaghFQ09CQVNJQ3IITExWOTBUQlEKNAjVggESBDg4NzgYpQQgg2komqedAzCkrJ0DOExAAVgBaghFQ09CQVNJQ3IITExWOTBUQlESDAgBEAEYASoCVUEyABgBIgQIARABKAIoAygEMAE) ![Austrian Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/OS.gif) Tue, Sep 8 - Tue, Sep 15 DEN Denver SOF Sofia $803 Roundtrip found 5 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:DEN,to:SOF,departure:9/8/2026TANYT&leg2=from:SOF,to:DEN,departure:9/15/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:802.83&airProductToken=AQq6AQpBCM-mARIEODMxMBiDaSCYzgEov6GXAzD9opcDOExAAFgBaghFQ09MSUdIVHIITExJOTBVQlF6CgjBhgESBDEwNDAKQAjPpgESBDgyNDgYmM4BIJUiKMOjlwMwvKeXAzhMQAFYAWoIRUNPTElHSFRyCExMSTkwVUJRegkIwYYBEgM4ODYKMwjPpgESAzc3NRiVIiDSKyj0qpcDMM6rlwM4TEABWAFqCEVDT0xJR0hUcghMTEk5MFVCUQqyAQo9CMGGARIEOTUyMBjSKyClBCie7ZcDMLTulwM4TEAAWAFqBUJBU0lDcghMS0k5MFRCUXoKCMyQARIEMTQyNwoxCMGGARIDODQzGKUEIJjOASiJ75cDMILzlwM4TEABWAFqBUJBU0lDcghMS0k5MFRCUQo-CMGGARIENDkwMhiYzgEgg2kolfqXAzD0-5cDOExAAVgBagVCQVNJQ3IITEtJOTBUQlF6CgjVggESBDE5NDQSCggBEAEYASoCQUMYASIECAEQASgCKAMoBDAB) ## Alternative airports near Sofia Prices were available within the past 7 days. Prices and availability are subject to change. [](https://www.expedia.com/Flights-Search?leg1=from:DEN,to:SOF,departure:4/21/2026TANYT&leg2=from:SOF,to:DEN,departure:4/25/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) SOF Sofia Airport CheapestClosest 11 min [Flights from $1,314 ](https://www.expedia.com/Flights-Search?leg1=from:DEN,to:SOF,departure:4/21/2026TANYT&leg2=from:SOF,to:DEN,departure:4/25/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) ## Frequently asked questions ### How much does a flight from Denver, CO (DEN-Denver Intl.) to Sofia (SOF) cost? ### What is the cheapest month to fly from Denver, CO (DEN-Denver Intl.) to Sofia (SOF)? ### Which airlines fly direct from Denver, CO (DEN-Denver Intl.) to Sofia (SOF)? ### What is the cheapest airline that flies from Denver, CO (DEN-Denver Intl.) to Sofia (SOF)? ### How do I find cheap flights from Denver, CO (DEN-Denver Intl.) to Sofia (SOF)? ### What is the best time to fly from Denver, CO (DEN-Denver Intl.) to Sofia (SOF)? ### What is the earliest flight from Denver, CO (DEN-Denver Intl.) to Sofia (SOF)? ### What are the most popular departure times for flights from Denver, CO (DEN-Denver Intl.) to Sofia (SOF)? ### How long does it take to fly from Denver, CO (DEN-Denver Intl.) to Sofia (SOF)? ### Can you fly business or first class from Denver, CO (DEN-Denver Intl.) to Sofia (SOF)? > - Lufthansa > - British Airways > - Icelandair > - Air Canada > - Turkish Airlines > - United Airlines > - Delta Air Lines > - Edelweiss Air > - American Airlines > > > First class is available with Lufthansa. ### How do I earn miles on a Denver, CO (DEN-Denver Intl.) to Sofia (SOF) flight with Expedia? ### Is it cheaper to buy a plane ticket from Denver, CO (DEN-Denver Intl.) to Sofia (SOF) at the last minute? ### Is it cheaper to book a Denver, CO (DEN-Denver Intl.) to Sofia (SOF) flight and hotel package? ### Can I cancel or change the date of my flight from Denver, CO (DEN-Denver Intl.) to Sofia (SOF)? ## Travel information | Origin airport | Denver Intl. | | ------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Destination airport | Sofia | | Airlines serving | Air Canada, Air France, Austrian Airlines, British Airways, ITA Airways, JetBlue Airways, KLM, Lufthansa, Swiss International Air Lines, Turkish Airlines, United | | Roundtrip price | $675 | | Distance | 5875 mi | ## Book with confidence # Denver to Sofia Flights The cheapest times to fly from Denver to Sofia On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Denver to Sofia are during the month of September. You can find some of the cheapest flights from Denver to Sofia with Expedia's search tool and vast selection of airlines. The best time to book a flight from Denver to Sofia Sunday is one of the best days to book for cheap flights from Denver to Sofia: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance. How to find cheap round-trip tickets from Denver to Sofia Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Denver to Sofia in 2026\. You can also book with separate airlines for your outbound and return journeys, from $339 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference\*. This is available for a small fee, and is free to One Key Gold and Platinum tier members. Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Denver to Sofia flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps. You could also save big by booking one of Expedia's [vacation packages](https://www.expedia.com/package-deals). Bundling together your Denver to Sofia airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures. \*Terms apply. Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023\. The percentages you see are averages. \*Flight schedules are subject to change. \*Available to One Key members. ## Explore a world of travel with Expedia - Lodging - Packages - Cars - [Hotels near Sofia Airport Terminal 2 Station ](https://www.expedia.com/Sofia-Airport-Terminal-2-Station-Hotels.d6345199.Travel-Guide-Hotels) - [Gay friendly Hotels in Slatina ](https://www.expedia.com/Slatina-Sofia-Hotels-LGBT-Welcoming-Hotel.0-n553248635974587263-0-tLGBTWelcomingHotel.Travel-Guide-Filter-Hotels) - [Hotels near Arena Armeec ](https://www.expedia.com/Arena-Armeec-Hotels.0-l553248621532502767-0.Travel-Guide-Filter-Hotels) - [Hotels near Inter Expo and Congress Center ](https://www.expedia.com/Inter-Expo-And-Congress-Center-Hotels.0-l6129557-0.Travel-Guide-Filter-Hotels) - [Hotels near Mladost ](https://www.expedia.com/Mladost-Sofia-Hotels.0-n553248635974587104-0.Travel-Guide-Filter-Hotels) - [Hotels near Borisova Gradina ](https://www.expedia.com/Borisova-Gradina-Hotels.0-l6097818-0.Travel-Guide-Filter-Hotels) - 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[Hotels near National Assembly ](https://www.expedia.com/National-Assembly-Hotels.0-l553248621533039078-0.Travel-Guide-Filter-Hotels) - [Hotels near Lozenets ](https://www.expedia.com/Lozenets-Sofia-Hotels.0-n3000660879-0.Travel-Guide-Filter-Hotels) - [Luxury Hotels in Lozenets ](https://www.expedia.com/Lozenets-Sofia-Hotels-Luxury-Hotel.0-n3000660879-0-tLuxuryHotel.Travel-Guide-Filter-Hotels) - [Resorts & Hotels with Spas in Lozenets ](https://www.expedia.com/Lozenets-Sofia-Hotels-Spa-Hotel.0-n3000660879-0-tSpaHotel.Travel-Guide-Filter-Hotels) - [Hotel Wedding Venues Hotels in Lozenets ](https://www.expedia.com/Lozenets-Sofia-Hotels-Wedding-Hotels.0-n3000660879-0-tWeddingHotels.Travel-Guide-Filter-Hotels) - [Romantic Hotels in Lozenets ](https://www.expedia.com/Lozenets-Sofia-Hotels-Romantic-Hotel.0-n3000660879-0-tRomanticHotel.Travel-Guide-Filter-Hotels) - [Hotels near Sofia City Center ](https://www.expedia.com/Sofia-City-Center-Sofia-Hotels.0-n3000660880-0.Travel-Guide-Filter-Hotels) - [Casino Hotels in Sofia City Center ](https://www.expedia.com/Sofia-City-Center-Sofia-Hotels-Casino-Hotel.0-n3000660880-0-tCasinoHotel.Travel-Guide-Filter-Hotels) - [Gay friendly Hotels in Sofia City Center ](https://www.expedia.com/Sofia-City-Center-Sofia-Hotels-LGBT-Welcoming-Hotel.0-n3000660880-0-tLGBTWelcomingHotel.Travel-Guide-Filter-Hotels) - [3 Star Hotels in Sofia City Center ](https://www.expedia.com/3Star-Sofia-City-Center-Sofia-Hotels.s30-n3000660880-0.Travel-Guide-Filter-Hotels) - [Hotels with Balconies in Sofia City Center ](https://www.expedia.com/Sofia-City-Center-Sofia-Hotels-Hotels-With-Balconies.0-n3000660880-0-tHotelswithBalconies.Travel-Guide-Filter-Hotels) - [Hotels with Free Parking in Sofia City Center ](https://www.expedia.com/Sofia-City-Center-Sofia-Hotels-Hotels-With-Free-Parking.0-n3000660880-0-tHotelswithFreeParking.Travel-Guide-Filter-Hotels) - [Hotels with Laundry Facilities in Sofia City Center ](https://www.expedia.com/Sofia-City-Center-Sofia-Hotels-Hotels-With-Laundry-Facilities.0-n3000660880-0-tHotelswithLaundryFacilities.Travel-Guide-Filter-Hotels) - [Hotels with Childcare in Sofia City Center ](https://www.expedia.com/Sofia-City-Center-Sofia-Hotels-Hotels-With-Childcare.0-n3000660880-0-tHotelswithChildcare.Travel-Guide-Filter-Hotels) - [Hotels with a Gym in Sofia City Center ](https://www.expedia.com/Sofia-City-Center-Sofia-Hotels-Hotels-With-Fitness-Center.0-n3000660880-0-tHotelswithFitnessCenter.Travel-Guide-Filter-Hotels) - [Beach Hotels in Sofia City Center ](https://www.expedia.com/Sofia-City-Center-Sofia-Hotels-Beach-Hotel.0-n3000660880-0-tBeachHotel.Travel-Guide-Filter-Hotels) - [Cheap Hotels in Sofia City Center ](https://www.expedia.com/Sofia-City-Center-Sofia-Hotels-Cheap-Hotels.0-n3000660880-0-tCheapHotels.Travel-Guide-Filter-Hotels) - [Boutique Hotels in Sofia City Center ](https://www.expedia.com/Sofia-City-Center-Sofia-Hotels-Boutique-Hotel.0-n3000660880-0-tBoutiqueHotel.Travel-Guide-Filter-Hotels) - [Hotels with Free Airport Shuttle in Sofia City Center ](https://www.expedia.com/Sofia-City-Center-Sofia-Hotels-Hotels-With-Free-Airport-Shuttle.0-n3000660880-0-tHotelswithFreeAirportShuttle.Travel-Guide-Filter-Hotels) - [Hotel Wedding Venues Hotels in Sofia City Center ](https://www.expedia.com/Sofia-City-Center-Sofia-Hotels-Wedding-Hotels.0-n3000660880-0-tWeddingHotels.Travel-Guide-Filter-Hotels) - [Hotels near Hristo Botev Sport Hall ](https://www.expedia.com/Hristo-Botev-Sport-Hall-Hotels.0-l553248621563225203-0.Travel-Guide-Filter-Hotels) - [Hotels near Banya Basha Mosque ](https://www.expedia.com/Banya-Basha-Mosque-Hotels.0-l6097838-0.Travel-Guide-Filter-Hotels) - [Aparthotels in Lavov Most Station ](https://www.expedia.com/Lavov-Most-Station-Apart-Hotels.d6338982-aaApartHotels.Travel-Guide-Accommodation) - [Hotels near Saint Sofia Monument ](https://www.expedia.com/Saint-Sofia-Monument-Hotels.0-l6097848-0.Travel-Guide-Filter-Hotels) - [Hotels near Saint Nedelya Church ](https://www.expedia.com/Saint-Nedelya-Church-Hotels.0-l6097812-0.Travel-Guide-Filter-Hotels) - [Hotels near Sofia Synagogue ](https://www.expedia.com/Sofia-Synagogue-Hotels.0-l553248621533039155-0.Travel-Guide-Filter-Hotels) - [Hotels near National Palace of Culture ](https://www.expedia.com/National-Palace-Of-Culture-Hotels.0-l6097814-0.Travel-Guide-Filter-Hotels) - [Festivalna Hall ](https://www.expedia.com/Festivalna-Hall-Sofia.d553248621563225124.Vacation-Attraction) - [Arena Armeec ](https://www.expedia.com/Arena-Armeec-Sofia.d553248621532502767.Vacation-Attraction) - [The Mall ](https://www.expedia.com/The-Mall-Sofia.d553248621563225128.Vacation-Attraction) - [Megapark ](https://www.expedia.com/Megapark-Sofia.d553248621559275858.Vacation-Attraction) - [European Trade Centre ](https://www.expedia.com/European-Trade-Centre-Sofia.d553248621559275861.Vacation-Attraction) - [Bulgareklama Inter Expo Center ](https://www.expedia.com/Bulgareklama-Inter-Expo-Center-Sofia.d553248621563225127.Vacation-Attraction) - [Iterpred World Trade Center ](https://www.expedia.com/Iterpred-World-Trade-Center-Sofia.d553248627679959907.Vacation-Attraction) - [Embassy of the Russian Federation ](https://www.expedia.com/Embassy-Of-The-Russian-Federation-Sofia.d553248627679962366.Vacation-Attraction) - [Oborishte park ](https://www.expedia.com/Oborishte-Park-Sofia-City-Center.d553248621533039088.Vacation-Attraction) - [Borisova Gradina ](https://www.expedia.com/Borisova-Gradina-Sofia.d6097818.Vacation-Attraction) - [Bulgarian Army Stadium ](https://www.expedia.com/Bulgarian-Army-Stadium-Sofia.d6097846.Vacation-Attraction) - [Visit Krivina ](https://www.expedia.com/Krivina.dx3000043670) - [Cyril and Methodius National Library of Bulgaria ](https://www.expedia.com/Cyril-And-Methodius-National-Library-Of-Bulgaria-Sofia-City-Center.d6097830.Vacation-Attraction) - [Vasil Levski Monument ](https://www.expedia.com/Vasil-Levski-Monument-Sofia-City-Center.d6097832.Vacation-Attraction) - [Vasil Levski Stadium ](https://www.expedia.com/Vasil-Levski-Stadium-Sofia.d6097816.Vacation-Attraction) - [National Gallery for Foreign Art ](https://www.expedia.com/National-Gallery-For-Foreign-Art-Sofia-City-Center.d6097852.Vacation-Attraction) - [Bulgarian Parliament ](https://www.expedia.com/Bulgarian-Parliament-Sofia-City-Center.d6097806.Vacation-Attraction) - [Alexander Nevski Cathedral ](https://www.expedia.com/Alexander-Nevski-Cathedral-Sofia-City-Center.d6097802.Vacation-Attraction) - [Monument to the Liberating Tsar ](https://www.expedia.com/Monument-To-The-Liberating-Tsar-Sofia-City-Center.d6097804.Vacation-Attraction) - [Crystal Park ](https://www.expedia.com/Crystal-Park-Sofia-City-Center.d553248621563225116.Vacation-Attraction) - [Amphitheatre of Serdica ](https://www.expedia.com/Amphitheatre-Of-Serdica-Sofia-City-Center.d553248621532502783.Vacation-Attraction) - [National art gallery ](https://www.expedia.com/National-Art-Gallery-Sofia-City-Center.d553248621533039083.Vacation-Attraction) - [Royal Palace ](https://www.expedia.com/Royal-Palace-Sofia-City-Center.d553248621533039084.Vacation-Attraction) - [Ivan Vazov National Theatre ](https://www.expedia.com/Ivan-Vazov-National-Theatre-Sofia-City-Center.d6097820.Vacation-Attraction) - [Prince Alexander of Battenberg Square ](https://www.expedia.com/Prince-Alexander-Of-Battenberg-Square-Sofia-City-Center.d6097850.Vacation-Attraction) - [City Garden ](https://www.expedia.com/City-Garden-Sofia-City-Center.d553248621533039080.Vacation-Attraction) - [Visit Sofia City Center ](https://www.expedia.com/Sofia-Sofia-City-Center.dx3000660880) - [Sofia City Art Gallery ](https://www.expedia.com/Sofia-City-Art-Gallery-Sofia-City-Center.d553248621533039158.Vacation-Attraction) - [National Archaeological Museum ](https://www.expedia.com/National-Archaeological-Museum-Sofia-City-Center.d6097808.Vacation-Attraction) - [National Assembly ](https://www.expedia.com/National-Assembly-Sofia-City-Center.d553248621533039078.Vacation-Attraction) - [Slaveykov Square ](https://www.expedia.com/Slaveykov-Square-Sofia-City-Center.d6097842.Vacation-Attraction) - [Visit Lozenets ](https://www.expedia.com/Sofia-Lozenets.dx3000660879) - [Saint Sofia Church ](https://www.expedia.com/Saint-Sofia-Church-Sofia-City-Center.d553248621532502785.Vacation-Attraction) - [Sofia City Center Vacations ](https://www.expedia.com/Sofia-City-Center.d3000660880.Destination-Travel-Guides) - [Peyo Yavorov House-Museum ](https://www.expedia.com/Peyo-Yavorov-House-Museum-Sofia-City-Center.d553248621533039148.Vacation-Attraction) - [Council of Ministers Sofia ](https://www.expedia.com/Council-Of-Ministers-Sofia-Sofia-City-Center.d6159910.Vacation-Attraction) - [Sofia Central Mineral Baths ](https://www.expedia.com/Sofia-Central-Mineral-Baths-Sofia-City-Center.d6097840.Vacation-Attraction) - [Regional History Museum Of Sofia ](https://www.expedia.com/Regional-History-Museum-Of-Sofia-Sofia-City-Center.d553248635212944737.Vacation-Attraction) - [Church of St. George ](https://www.expedia.com/Church-Of-St-George-Sofia-City-Center.d6097822.Vacation-Attraction) - [Tzum Central Department Store ](https://www.expedia.com/TZUM-Central-Department-Store-Sofia-City-Center.d6173675.Vacation-Attraction) - [Sveta Petka Samardzhiiska Church ](https://www.expedia.com/Sveta-Petka-Samardzhiiska-Church-Sofia-City-Center.d553248621533039154.Vacation-Attraction) - [Sveta Petka Samardjiyska ](https://www.expedia.com/Sveta-Petka-Samardjiyska-Sofia-City-Center.d553248621532502776.Vacation-Attraction) - [Saint Sofia Monument ](https://www.expedia.com/Saint-Sofia-Monument-Sofia-City-Center.d6097848.Vacation-Attraction) - [Vitoshka Boulevard ](https://www.expedia.com/Vitoshka-Boulevard-Rajon-Triaditsa.d6170818.Vacation-Attraction) - [Sofia Court House ](https://www.expedia.com/Sofia-Court-House-Sofia-City-Center.d553248634289805213.Vacation-Attraction) - [Saint Nedelya Church ](https://www.expedia.com/Saint-Nedelya-Church-Sofia-City-Center.d6097812.Vacation-Attraction) - [Sofia Zoo ](https://www.expedia.com/Sofia-Zoo-Lozenets.d6097826.Vacation-Attraction) - [Ploshtad Bulgaria ](https://www.expedia.com/Ploshtad-Bulgaria-Sofia-City-Center.d553248621533039146.Vacation-Attraction) - [National Palace of Culture ](https://www.expedia.com/National-Palace-Of-Culture-Sofia-City-Center.d6097814.Vacation-Attraction) - [Ndk ](https://www.expedia.com/NDK-Sofia-City-Center.d553248621563225204.Vacation-Attraction) - [Car rentals near Iskar ](https://www.expedia.com/Car-Rentals-In-Iskar.d553248635974587407.Car-Rental-Guide) - [Car rentals near Boris Garden ](https://www.expedia.com/Car-Rentals-In-Boris-Garden.d553248621563225121.Car-Rental-Guide) - 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