Title: $230 Cheap flights from Philadelphia to Sofia (PHL to SOF) - Expedia.com ![Ivan Vazov National Theatre which includes heritage architecture](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) # $230 Cheap Flights from Philadelphia (PHL) to Sofia (SOF) [View $230 flight on Sun, Aug 2, 2026](https://expedia.com/Flights-Search?trip=oneway&leg1=from:PHL,to:SOF,departure:8/2/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:229.40&airProductToken=AQplCjAIwoIBEgI2NhjvWSDriQEo1YOUAzD-hpQDOE9AAFgBagVOT0JBR3IIT0xYOUM5QlYKMQjCggESAzg5MhjriQEg0isosYqUAzD0i5QDOE9AAVgBagVOT0JBR3IIT0xYOUM5QlYSCggBEAEYASoCQkEYASIECAEQASgCKAMwDQ) - [Roundtrip](?flightType=roundtrip) - [One-way](?flightType=oneway) - [Multi-city](?flightType=multicity) ### Travelers Adults ChildrenAges 2 to 17 InfantsYounger than 2 EconomyPremium economyBusiness classFirst class Leaving from Going to Departing Returning Add a place to stay Add a car Direct flights only ## Popular airlines from Philadelphia Intl. Airport (PHL) to Sofia Airport (SOF) - ![](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:PHL,to:SOF,departure:2/21/2026TANYT&leg2=from:SOF,to:PHL,departure:2/28/2026TANYT&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_OS.svg) Austrian Airlines [](https://www.expedia.com/Flights-Search?leg1=from:PHL,to:SOF,departure:2/21/2026TANYT&leg2=from:SOF,to:PHL,departure:2/28/2026TANYT&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:PHL,to:SOF,departure:2/21/2026TANYT&leg2=from:SOF,to:PHL,departure:2/28/2026TANYT&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_UA.svg) United [](https://www.expedia.com/Flights-Search?leg1=from:PHL,to:SOF,departure:2/21/2026TANYT&leg2=from:SOF,to:PHL,departure:2/28/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_BA.svg) British Airways [](https://www.expedia.com/Flights-Search?leg1=from:PHL,to:SOF,departure:2/21/2026TANYT&leg2=from:SOF,to:PHL,departure:2/28/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"BA"}}]) - ![](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:PHL,to:SOF,departure:2/21/2026TANYT&leg2=from:SOF,to:PHL,departure:2/28/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"LX"}}]) - ![](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:PHL,to:SOF,departure:2/21/2026TANYT&leg2=from:SOF,to:PHL,departure:2/28/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"KL"}}]) - ![](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 Philadelphia to Sofia (PHL-SOF) Prices were available within the past 7 days and start at $230 for one-way flights and $487 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip ![Air Canada](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AC.gif) Mon, Mar 23 - Tue, Apr 14 PHL Philadelphia SOF Sofia $487 Roundtrip found 16 hours ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:PHL,to:SOF,departure:3/23/2026TANYT&leg2=from:SOF,to:PHL,departure:4/14/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:486.33&airProductToken=AQpmCiAIwYYBEgQ4ODYyGO9ZIJhdKJK1iAMw8bWIAzhMQABYAQogCMGGARIEOTA5OBiYXSCMFSjmt4gDMJ67iAM4TEABWAEKIAjBhgESBDk2MDIYjBUg0iso1buIAzDDvIgDOExAAVgBCkQKIAjMkAESBDE0MzEY0isgpQQo_qSKAzCUpooDOExAAFgBCiAIzJABEgQ0MjcyGKUEIO9ZKOOoigMw9ayKAzhMQAFYARIKCAEQARgBKgJBQxgBIgQIARABKAQwAQ) ![Air Canada](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AC.gif) Mon, Mar 23 - Thu, Apr 2 PHL Philadelphia SOF Sofia $487 Roundtrip found 2 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:PHL,to:SOF,departure:3/23/2026TANYT&leg2=from:SOF,to:PHL,departure:4/2/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:486.53&airProductToken=AQpmCiAIwYYBEgQ4ODYyGO9ZIJhdKJK1iAMw8bWIAzhMQABYAQogCMGGARIEOTA5OBiYXSCMFSjmt4gDMJ67iAM4TEABWAEKIAjBhgESBDk2MDIYjBUg0iso1buIAzDDvIgDOExAAVgBCkQKIAjMkAESBDE0MzEY0isgpQQokp6JAzCon4kDOExAAFgBCiAIzJABEgQ0MjcyGKUEIO9ZKOOhiQMw9aWJAzhMQAFYARIKCAEQARgBKgJBQxgBIgQIARABKAQwAQ) ![Lufthansa](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LH.gif) Wed, Feb 18 - Thu, Mar 12 PHL Philadelphia SOF Sofia $488 Roundtrip found 4 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:PHL,to:SOF,departure:2/18/2026TANYT&leg2=from:SOF,to:PHL,departure:3/12/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:487.33&airProductToken=AQq5AQpACMyQARIENjU2NRjvWSCYXSiuwoUDMI3DhQM4TEAAWAFqCEVDT0xJR0hUcghMTFg3NlVCUXoKCMGGARIEODg2MgozCMyQARIDNDc1GJhdIIwVKMbEhQMw_seFAzhMQAFYAWoIRUNPTElHSFRyCExMWDc2VUJRCkAIzJABEgQ0MTU4GIwVINIrKLXIhQMwo8mFAzhMQAFYAWoIRUNPTElHSFRyCExMWDc2VUJRegoI1pgBEgQxNzAyCncKNAjMkAESBDE0MzEY0isgpQQokLKHAzCrs4cDOExAAFgBaghFQ09MSUdIVHIITExYNzZVQlEKPwjMkAESBDQyNzIYpQQg71ko8LWHAzCRuocDOExAAVgBaghFQ09MSUdIVHIITExYNzZVQlF6CQi0sgESAzA1MBIKCAEQARgBKgJMSBgBIgQIARABKAIoAygEMAs) ![Air Canada](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AC.gif) Mon, Mar 23 - Wed, Apr 8 PHL Philadelphia SOF Sofia $490 Roundtrip found 16 hours ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:PHL,to:SOF,departure:3/23/2026TANYT&leg2=from:SOF,to:PHL,departure:4/8/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:489.73&airProductToken=AQpmCiAIwYYBEgQ4ODYyGO9ZIJhdKJK1iAMw8bWIAzhMQABYAQogCMGGARIEOTA5OBiYXSCMFSjmt4gDMJ67iAM4TEABWAEKIAjBhgESBDk2MDIYjBUg0iso1buIAzDDvIgDOExAAVgBCmYKIAjVggESBDkyNjkY0isgpQQoyOGJAzDe4okDOExAAFgBCiAI1YIBEgQ4NTc5GKUEIJhdKNvjiQMwseeJAzhMQAFYAQogCNWCARIENjYxOBiYXSDvWSiG6IkDMOboiQM4TEABWAESCggBEAEYASoCQUMYASIECAEQASgEMAE) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Tue, Mar 24 - Wed, Apr 8 PHL Philadelphia SOF Sofia $491 Roundtrip found 16 hours ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:PHL,to:SOF,departure:3/24/2026TANYT&leg2=from:SOF,to:PHL,departure:4/8/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:490.83&airProductToken=AQplCiAI1YIBEgQ0NjAzGO9ZIIgYKIu-iAMw1L6IAzhMQABYAQofCNWCARIDMTA4GIgYIIwVKPDBiAMw0MWIAzhMQAFYAQogCNWCARIEOTI0NhiMFSDSKyj1xogDMOPHiAM4TEABWAEKZgogCNWCARIEOTI2ORjSKyClBCjI4YkDMN7iiQM4TEAAWAEKIAjVggESBDg1NzkYpQQgmF0o2-OJAzCx54kDOExAAVgBCiAI1YIBEgQ2NjE4GJhdIO9ZKIboiQMw5uiJAzhMQAFYARIKCAEQARgBKgJVQRgBIgQIARABKAQwAQ) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Sun, Feb 15 - Wed, Feb 25 PHL Philadelphia SOF Sofia $494 Roundtrip found 3 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:PHL,to:SOF,departure:2/15/2026TANYT&leg2=from:SOF,to:PHL,departure:2/25/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:493.43&airProductToken=AQplCh8I1YIBEgMzMDgY71kgrhwoqKGFAzDBooUDOExAAFgBCiAI1YIBEgQ4ODU0GK4cIIwVKIakhQMw-qeFAzhMQAFYAQogCNWCARIEOTEzNBiMFSDSKyiGqYUDMPSphQM4TEABWAEKZgogCMGGARIEOTUyNBjSKyCMFSiQjYYDMJKOhgM4TEAAWAEKIAjBhgESBDkwOTkYjBUgmF0oyY6GAzC4koYDOExAAVgBCiAIwYYBEgQ4ODU5GJhdIO9ZKKKbhgMwg5yGAzhMQAFYARIKCAEQARgBKgJVQRgBIgQIARABKAQwAQ) ![Swiss International Air Lines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LX.gif) Mon, Apr 27 - Tue, May 5 PHL Philadelphia SOF Sofia $494 Roundtrip found 4 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:PHL,to:SOF,departure:4/27/2026TANYT&leg2=from:SOF,to:PHL,departure:5/5/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:493.53&airProductToken=AQq3AQpACMywARIEMzMwNRjvWSCuHCiCvYsDMJS-iwM4TEAAWAFqCEVDT0xJR0hUcghMTFg3NlVCUXoKCNWCARIEMTkwOQoxCMywARIBNxiuHCC5PCjovosDMPrCiwM4TEABWAFqCEVDT0xJR0hUcghMTFg3NlVCUQpACMywARIEMTM5MBi5PCDSKyikxIsDMKvFiwM4TEABWAFqCEVDT0xJR0hUcghMTFg3NlVCUXoKCMKoARIEMTM5MAqkAQo9CMGGARIEOTA0MRjSKyClBCiekYwDMLSSjAM4TEAAWAFqBUJBU0lDcghMTFg3NlVCUXoKCMyQARIEMTQzMQowCMGGARIDODQ1GKUEIJhdKLuTjAMwkZeMAzhMQAFYAWoFQkFTSUNyCExMWDc2VUJRCjEIwYYBEgQ4ODYzGJhdIO9ZKPuajAMw3ZuMAzhMQAFYAWoFQkFTSUNyCExMWDc2VUJREgoIARABGAEqAkFDGAEiBAgBEAEoAigDKAQwAQ) ![Air Canada](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AC.gif) Wed, Feb 18 - Tue, Mar 3 PHL Philadelphia SOF Sofia $495 Roundtrip found 1 day ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:PHL,to:SOF,departure:2/18/2026TANYT&leg2=from:SOF,to:PHL,departure:3/3/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:494.63&airProductToken=AQpmCiAIwYYBEgQ4ODYyGO9ZIJhdKK7ChQMwjcOFAzhMQABYAQogCMGGARIEOTA5OBiYXSCMFSjGxIUDMP7HhQM4TEABWAEKIAjBhgESBDkzNzUYjBUg0iso5sqFAzDUy4UDOExAAVgBCmgKIAjVggESBDkxMjUY0isgpQQo39CGAzD60YYDOExAAFgBCiEI1YIBEgQ4NTkzGKUEIJjOASjK0oYDMM3WhgM4TEABWAEKIQjVggESBDgyMTAYmM4BIO9ZKKLXhgMwgtiGAzhMQAFYARIKCAEQARgBKgJBQxgBIgQIARABKAQwAQ) ![Lufthansa](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LH.gif) Tue, Mar 24 - Tue, Mar 31 PHL Philadelphia SOF Sofia $496 Roundtrip found 1 day ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:PHL,to:SOF,departure:3/24/2026TANYT&leg2=from:SOF,to:PHL,departure:3/31/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:495.53&airProductToken=AQpsCjQIzJABEgQ0MjczGO9ZIKUEKPDBiAMwxsWIAzhMQABYAWoIRUNPTElHSFRyCExMWDc2VUJRCjQIzJABEgQxNDMwGKUEINIrKJbLiAMwncyIAzhMQAFYAWoIRUNPTElHSFRyCExMWDc2VUJRCmwKNAjMkAESBDE0MzEY0isgpQQovoeJAzDUiIkDOExAAFgBaghFQ09MSUdIVHIITExYNzZVQlEKNAjMkAESBDQyNzIYpQQg71koo4uJAzC1j4kDOExAAVgBaghFQ09MSUdIVHIITExYNzZVQlESDAgBEAEYASoCTEgyABgBIgQIARABKAIoAygEMAs) ![Austrian Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/OS.gif) Wed, Feb 25 - Wed, Mar 4 PHL Philadelphia SOF Sofia $536 Roundtrip found 3 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:PHL,to:SOF,departure:2/25/2026TANYT&leg2=from:SOF,to:PHL,departure:3/4/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:535.03&airProductToken=AQqxAQo-CM-mARIEODMwNhjvWSCYzgEowo2GAzCijoYDOExAAFgBagVFTFQwMHIITExYNzZVQlF6CgjBhgESBDg1MTEKPQjPpgESBDgyNDgYmM4BIJUiKMKShgMwsZaGAzhMQABYAWoFRUxUMDByCExMWDc2VUJRegkIwYYBEgM4ODYKMAjPpgESAzc3NRiVIiDSKyjGmYYDMKCahgM4TEAAWAFqBUVMVDAwcghMTFg3NlVCUQqxAQowCM-mARIDNzc2GNIrIJUiKI3ehgMw7N6GAzhMQABYAWoFRUxUMDByCExMWDc2VUJRCj0Iz6YBEgQ4MjQ3GJUiIJjOASj_5YYDMKrqhgM4TEAAWAFqBUVMVDAwcghMTFg3NlVCUXoJCMGGARIDODg3Cj4Iz6YBEgQ4MzA1GJjOASDvWSji7YYDMMDuhgM4TEAAWAFqBUVMVDAwcghMTFg3NlVCUXoKCMGGARIEODUyMBIKCAEQARgBKgJPUxgBIgQIARABKAIoAygEMAs) ## 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:PHL,to:SOF,departure:2/21/2026TANYT&leg2=from:SOF,to:PHL,departure:3/3/2026TANYT&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 $550 ](https://www.expedia.com/Flights-Search?leg1=from:PHL,to:SOF,departure:2/21/2026TANYT&leg2=from:SOF,to:PHL,departure:3/3/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) __Flights from Philadelphia (PHL) to Sofia (SOF)__ | Origin airport | Philadelphia Intl. | | ------------------- | ----------------------------------------------------------------------------------------------------------------- | | Destination airport | Sofia | | Airlines serving | Air Canada, Air France, Austrian Airlines, British Airways, KLM, Lufthansa, Swiss International Air Lines, United | | Roundtrip price | $486 | | Distance | 4802 mi | ## Philadelphia to Sofia Flights The cheapest times to fly from Philadelphia 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 Philadelphia to Sofia are during the month of March. You can find some of the cheapest flights from Philadelphia to Sofia with Expedia's search tool and vast selection of airlines. The best time to book a flight from Philadelphia to Sofia Sunday is one of the best days to book for cheap flights from Philadelphia 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 Philadelphia 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 Philadelphia to Sofia in 2026\. You can also book with separate airlines for your outbound and return journeys, from $230 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 Philadelphia 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 Philadelphia 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. ## Frequently asked questions ### How much does a flight from Philadelphia, PA (PHL-Philadelphia Intl.) to Sofia (SOF) cost? ### What is the cheapest month to fly from Philadelphia, PA (PHL-Philadelphia Intl.) to Sofia (SOF)? ### Which airlines fly direct from Philadelphia, PA (PHL-Philadelphia Intl.) to Sofia (SOF)? ### What is the cheapest airline that flies from Philadelphia, PA (PHL-Philadelphia Intl.) to Sofia (SOF)? ### How do I find cheap flights from Philadelphia, PA (PHL-Philadelphia Intl.) to Sofia (SOF)? ### What is the best time to fly from Philadelphia, PA (PHL-Philadelphia Intl.) to Sofia (SOF)? ### What is the earliest flight from Philadelphia, PA (PHL-Philadelphia Intl.) to Sofia (SOF)? ### What are the most popular departure times for flights from Philadelphia, PA (PHL-Philadelphia Intl.) to Sofia (SOF)? ### How long does it take to fly from Philadelphia, PA (PHL-Philadelphia Intl.) to Sofia (SOF)? ### Can you fly business or first class from Philadelphia, PA (PHL-Philadelphia Intl.) to Sofia (SOF)? > - Air Canada > - American Airlines > - Delta Air Lines > - British Airways > - United Airlines > > > First class is available with United Airlines. ### How do I earn miles on a Philadelphia, PA (PHL-Philadelphia Intl.) to Sofia (SOF) flight with Expedia? ### Is it cheaper to buy a plane ticket from Philadelphia, PA (PHL-Philadelphia Intl.) to Sofia (SOF) at the last minute? ### Is it cheaper to book a Philadelphia, PA (PHL-Philadelphia Intl.) to Sofia (SOF) flight and hotel package? ### Can I cancel or change the date of my flight from Philadelphia, PA (PHL-Philadelphia Intl.) to Sofia (SOF)? \*Flight schedules are subject to change. ## 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) - 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