Title: $445 Cheap flights from Washington to Singapore (IAD to SIN) - Expedia.com ![Gardens by the Bay which includes night scenes, a garden and modern architecture](https://images.trvl-media.com/place/6193104/16f05d8e-e7b7-4d2d-b3c7-df61dae96d31.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/6193104/16f05d8e-e7b7-4d2d-b3c7-df61dae96d31.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # $445 Cheap Flights from Washington (IAD) to Singapore (SIN) [View $445 flight on Tue, Sep 15, 2026](https://expedia.com/Flights-Search?trip=oneway&leg1=from:IAD,to:SIN,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:444.50&airProductToken=AQp-CigIwaYBEgM3MzcYiBggkgEokvKXAzDu9JcDOE9AAFgBcgdPTE9YQlVTCigI0KQBEgMxMjUYkgEgrFsokvaXAzDQ_JcDOE9AAVgBcgdPTE9YQlVTCigI0KQBEgM1MTEYrFsgkmoom_2XAzCB_5cDOE9AAVgBcgdPTE9YQlVTEgwIARABGAEqAlBSMgAYASIECAEQASgCKAMoBDAB) - [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 Washington Dulles Intl. Airport (IAD) to Singapore Changi Airport (SIN) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_QR.svg) Qatar Airways [](https://www.expedia.com/Flights-Search?leg1=from:IAD,to:SIN,departure:3/18/2026TANYT&leg2=from:SIN,to:IAD,departure:3/25/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"QR"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_EY.svg) Etihad Airways [](https://www.expedia.com/Flights-Search?leg1=from:IAD,to:SIN,departure:3/18/2026TANYT&leg2=from:SIN,to:IAD,departure:3/25/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"EY"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_EK.svg) Emirates [](https://www.expedia.com/Flights-Search?leg1=from:IAD,to:SIN,departure:3/18/2026TANYT&leg2=from:SIN,to:IAD,departure:3/25/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"EK"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_B6.svg) JetBlue Airways [](https://www.expedia.com/Flights-Search?leg1=from:IAD,to:SIN,departure:3/18/2026TANYT&leg2=from:SIN,to:IAD,departure:3/25/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"B6"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AS.svg) Alaska Airlines [](https://www.expedia.com/Flights-Search?leg1=from:IAD,to:SIN,departure:3/18/2026TANYT&leg2=from:SIN,to:IAD,departure:3/25/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AS"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_JX.svg) Starlux Airlines [](https://www.expedia.com/Flights-Search?leg1=from:IAD,to:SIN,departure:3/18/2026TANYT&leg2=from:SIN,to:IAD,departure:3/25/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"JX"}}]) - ![](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:IAD,to:SIN,departure:3/18/2026TANYT&leg2=from:SIN,to:IAD,departure:3/25/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"TK"}}]) - ![](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 Washington to Singapore (IAD-SIN) Prices were available within the past 7 days and start at $445 for one-way flights and $849 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip ![Etihad Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/EY.GIF) Sun, Apr 5 - Tue, Apr 21 IAD Washington SIN Singapore $849 Roundtrip just found [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:IAD,to:SIN,departure:4/5/2026TANYT&leg2=from:SIN,to:IAD,departure:4/21/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:848.63&airProductToken=AQpkCi8IxbIBEgE2GIgYIIA9KJ7HiQMwr82JAzhUQABYAWoGWUJBU0lDcghUTk4wM0gxVAoxCMWyARIDNDk4GIA9IJJqKOTRiQMwxNWJAzhUQAFYAWoGWUJBU0lDcghUTk4wM0gxVApkCjEIxbIBEgM0OTkYkmoggD0orPiKAzDk-4oDOFRAAFgBagZZQkFTSUNyCFROTjAzSDFUCi8IxbIBEgE1GIA9IIgYKJP9igMw-YOLAzhUQAFYAWoGWUJBU0lDcghUTk4wM0gxVBIKCAEQARgBKgJFWRgBIgQIARABKAIoAygEMAE) ![Turkish Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/TK.gif) Thu, Mar 12 - Wed, Mar 18 IAD Washington SIN Singapore $971 Roundtrip found 5 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:IAD,to:SIN,departure:3/12/2026TANYT&leg2=from:SIN,to:IAD,departure:3/18/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:970.13&airProductToken=AQpbCiwI1JYBEgMxODgYiBggyJwBKPa4hwMwzr2HAzhXQABYAWoCUFNyBldWM1hQQworCNSWARICNTQYyJwBIJJqKJrGhwMwn8uHAzhXQAFYAWoCUFNyBldWM1hQQwpcCiwI1JYBEgMyMDkYkmogyJwBKLz1hwMw-PqHAzhXQABYAWoCUFNyBldWM1hQQwosCNSWARIDMTg3GMicASCIGCjKgYgDMO2GiAM4V0ABWAFqAlBTcgZXVjNYUEMSCggCEAEYAioCVEsYASIECAEQASgCKAMoBDAB) ![Air Canada](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AC.gif) Tue, Sep 8 - Thu, Sep 17 IAD Washington SIN Singapore $989 Roundtrip found 5 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:IAD,to:SIN,departure:9/8/2026TANYT&leg2=from:SIN,to:IAD,departure:9/17/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:988.93&airProductToken=AQqZAQoyCMGGARIEODYxORiIGCCYzgEo0KKXAzClo5cDOEdAAFgBagVCQVNJQ3IIR05BMkEyQkEKMQjBhgESAjMzGJjOASC4jQEohKSXAzCpppcDOEdAAVgBagVCQVNJQ3IIR05BMkEyQkEKMAjBhgESAjE5GLiNASCSaij2ppcDMLuulwM4S0ABWAFqBUJBU0lDcghLTFhZOTFCQQqZAQowCMGGARICMjAYkmoguI0BKIT-lwMw5YSYAzhLQABYAWoFQkFTSUNyCEtMWFk5MUJBCjEIwYYBEgIzNBi4jQEgmM4BKICGmAMwjYiYAzhHQAFYAWoFQkFTSUNyCEdOQTJBMkJBCjIIwYYBEgQ4NjE4GJjOASCIGCifiZgDMPmJmAM4R0ABWAFqBUJBU0lDcghHTkEyQTJCQRIKCAEQARgBKgJBQxgBIgQIARABKAIoAygEMA0) ![EVA Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/BR.gif) Tue, Sep 15 - Sun, Sep 20 IAD Washington SIN Singapore $1,053 Roundtrip found 4 hours ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:IAD,to:SIN,departure:9/15/2026TANYT&leg2=from:SIN,to:IAD,departure:9/20/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1052.63&airProductToken=AQpMCiMIwqQBEgEzGIgYIPMjKLvqlwMw9vGXAzhWQABYAXIEVkxYVQolCMKkARIDMjI1GPMjIJJqKILzlwMwi_WXAzhWQAFYAXIEVkxYVQpMCiUIwqQBEgMyMTYYkmog8yMo2KOYAzDwpZgDOFZAAFgBcgRWTFhVCiMIwqQBEgE0GPMjIIgYKPKwmAMw2LeYAzhWQAFYAXIEVkxYVRIMCAIQARgCKgJCUjIAGAEiBAgBEAEoAigEKAYwAQ) ![STARLUX Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/JX.gif) Tue, Apr 14 - Tue, Apr 21 IAD Washington SIN Singapore $1,107 Roundtrip found 1 day ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:IAD,to:SIN,departure:4/14/2026TANYT&leg2=from:SIN,to:IAD,departure:4/21/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1106.23&airProductToken=AQqGAQozCMqwARIENzA3MxiIGCCSASivrooDMI6xigM4TkAAWAFyBk5MVUpUN3oJCMGmARIDNzM3CiYIyrABEgIzMRiSASDzIyjPsooDMMe4igM4TkABWAFyBk5MVUpUNwonCMqwARIDNzcxGPMjIJJqKIW6igMwmLyKAzhOQAFYAXIGTkxVSlQ3CoYBCicIyrABEgM3NzIYkmog8yMokvWKAzC094oDOFNAAFgBcgZTTFVKVDcKJgjKsAESAjMyGPMjIJIBKPr3igMwjv2KAzhTQAFYAXIGU0xVSlQ3CjMIyrABEgQ3MDcyGJIBIIgYKNj_igMwhIKLAzhOQAFYAXIGU0xVSlQ3egkIwaYBEgMzNjcSCggCEAEYAioCSlgYASIECAEQASgCKAQoBjAB) ![Qatar Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/QR.gif) Thu, Apr 9 - Wed, Apr 15 IAD Washington SIN Singapore $1,173 Roundtrip just found [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:IAD,to:SIN,departure:4/9/2026TANYT&leg2=from:SIN,to:IAD,departure:4/15/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1172.03&airProductToken=AQpqCjMI0aQBEgM3MDgYiBggwzso_PaJAzD0_IkDOFRAAFgBaghFQ0xBU1NJQ3IIVExVU1AxUkUKMwjRpAESAzk0OBjDOyCSaijlgYoDMLGFigM4VEABWAFqCEVDTEFTU0lDcghUTFVTUDFSRQpqCjMI0aQBEgM5NDUYkmogwzsow6yKAzCjsIoDOFRAAFgBaghFQ0xBU1NJQ3IIVExVU1AxUkUKMwjRpAESAzcwNxjDOyCIGCilsYoDMJW4igM4VEABWAFqCEVDTEFTU0lDcghUTFVTUDFSRRIKCAEQARgBKgJRUhgBIgQIARABKAIoBCgGMAE) ![JetBlue Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/b6.gif) Fri, May 8 - Sat, May 16 IAD Washington SIN Singapore $1,173 Roundtrip found 11 hours ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:IAD,to:SIN,departure:5/8/2026TANYT&leg2=from:SIN,to:IAD,departure:5/16/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1172.03&airProductToken=AQpsCjQIwmwSBDU1NTUYiBggwzso9LyMAzDswowDOE9AAFgBcghPTFVTUDFSRXoJCNGkARIDNzA4CjQIwmwSBDY1MzIYwzsgkmoo58eMAzDRy4wDOE9AAVgBcghPTFVTUDFSRXoJCNGkARIDOTQ4CmwKNAjCbBIENTU4NBiSaiDDOyijiY0DMNuMjQM4T0AAWAFyCE9MVVNQMVJFegkI0aQBEgM5NDUKNAjCbBIENTU1NBjDOyCIGCiZjo0DMPWUjQM4T0ABWAFyCE9MVVNQMVJFegkI0aQBEgM3MDcSCggBEAEYASoCQjYYASIECAEQASgCKAMoBDAB) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Wed, Dec 30 - Sun, Jan 10 IAD Washington SIN Singapore $1,176 Roundtrip found 6 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:IAD,to:SIN,departure:12/30/2026TANYT&leg2=from:SIN,to:IAD,departure:1/10/2027TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1175.63&airProductToken=AQpoCjMI1YIBEgM3OTYYiBggsnEotpqhAzCnnaEDOFNAAFgBaghFQ09CQVNJQ3IIU0xYMDBTQkgKMQjVggESATEYsnEgkmoo656hAzCAp6EDOFNAAVgBaghFQ09CQVNJQ3IIU0xYMDBTQkgKdgo_CNWCARIENzk5MhiSaiCnGyjFjaIDMNWQogM4U0AAWAFqCEVDT0JBU0lDcghTTFgwMFNCSHoJCM6QARIDODQyCjMI1YIBEgM4MDQYpxsgiBgolpuiAzCYoaIDOFNAAVgBaghFQ09CQVNJQ3IIU0xYMDBTQkgSCggBEAEYASoCVUEYASIECAEQASgCKAMoBDAB) ![Korean Air](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/ke.gif) Thu, Sep 3 - Tue, Sep 15 IAD Washington SIN Singapore $1,179 Roundtrip found 5 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:IAD,to:SIN,departure:9/3/2026TANYT&leg2=from:SIN,to:IAD,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:1178.93&airProductToken=AQpnCjEIy4oBEgI5NBiIGCDIaCiL6ZYDMKjwlgM4VEAAWAFqB0VZU0FWRVJyCFRMWDBaTkJaCjIIy4oBEgM2NDUYyGggkmoo5PCWAzDb85YDOFRAAVgBagdFWVNBVkVScghUTFgwWk5CWgpnCjIIy4oBEgM2NDYYkmogyGgo9eSXAzD255cDOFRAAFgBagdFWVNBVkVScghUTFgwWk5CWgoxCMuKARICOTMYyGggiBgo1eiXAzCJ75cDOFRAAVgBagdFWVNBVkVScghUTFgwWk5CWhIKCAEQARgBKgJLRRgBIgQIARABKAIoBCgGMAE) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Tue, Sep 15 - Wed, Sep 23 IAD Washington SIN Singapore $1,190 Roundtrip found 5 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:IAD,to:SIN,departure:9/15/2026TANYT&leg2=from:SIN,to:IAD,departure:9/23/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1189.93&airProductToken=AQqvAQo1CMSYARIEMzk5NhiIGCDMfCjn7JcDMJHulwM4RUAAWAFqCU1BSU5CQVNJQ3IIVkxYMFpOQloKNAjEmAESAzE3MRjMfCDIaCjH8JcDMJT3lwM4RUABWAFqCU1BSU5CQVNJQ3IIVkxYMFpOQloKQAjEmAESBDc4MjEYyGggkmoo5PeXAzDb-pcDOEVAAVgBaglNQUlOQkFTSUNyCFZMWDBaTkJaegkIy4oBEgM2NDUKsQEKQAjEmAESBDc4MjIYkmogyGgo9b6YAzD2wZgDOEVAAFgBaglNQUlOQkFTSUNyCFZMWDBaTkJaegkIy4oBEgM2NDYKNQjEmAESAzE1OBjIaCDjtAEoy8KYAzDXyJgDOEVAAVgBaglNQUlOQkFTSUNyCFZMWDBaTkJaCjYIxJgBEgQxNzg3GOO0ASCIGCjvypgDMMnLmAM4RUABWAFqCU1BSU5CQVNJQ3IIVkxYMFpOQloSCggBEAEYASoCREwYASIECAEQASgCKAMoBDAB) ![](https://forever.travel-assets.com/flex/flexmanager/images/2026/02/06/expedia-sale-2026-desktop-us-ca.jpg?impolicy=fcrop&w=1400&h=600&q=mediumHigh) ## The Annual Vacation Sale Members save up to 40% on hotels and homes. Plan this year’s big trip and save. [Book now](https://expedia.com/deals?rfrr=FTG_SPRING_PROMO_) ## Alternative airports near Singapore Prices were available within the past 7 days. Prices and availability are subject to change. [](https://www.expedia.com/Flights-Search?leg1=from:IAD,to:BTH,departure:3/18/2026TANYT&leg2=from:BTH,to:IAD,departure:3/22/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) BTH Hang Nadim [Flights from $1,237 ](https://www.expedia.com/Flights-Search?leg1=from:IAD,to:BTH,departure:3/18/2026TANYT&leg2=from:BTH,to:IAD,departure:3/22/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) ## Find the cheapest month to fly from Washington (IAD) to Singapore (SIN) ### September is typically the cheapest month to fly From $814 - $1,159 per traveler. ## Frequently asked questions ### How much does a flight from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi) cost? ### What is the cheapest month to fly from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi)? ### Which airlines fly direct from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi)? ### What is the cheapest airline that flies from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi)? ### How do I find cheap flights from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi)? ### What is the best time to fly from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi)? ### What is the earliest flight from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi)? ### What are the most popular departure times for flights from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi)? ### How long does it take to fly from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi)? ### Can you fly business or first class from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi)? > - British Airways > - Lufthansa > - United Airlines > - Aer Lingus > - Emirates > - Swiss International Air Lines > - Air Canada > - Qatar Airways > - Korean Air > - Turkish Airlines > > > First class cabins are available on: > > > - Emirates > - Swiss International Air Lines > - Lufthansa > - British Airways > - United Airlines > - Delta Air Lines > - Air France ### How do I earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi) flight with Expedia? ### What airports do you fly into for Singapore from Washington Dulles Intl. (IAD)? ### Is it cheaper to buy a plane ticket from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi) at the last minute? ### Is it cheaper to book a Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi) flight and hotel package? ### Can I cancel or change the date of my flight from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi)? ## Travel information | Origin airport | Washington Dulles Intl. | | ------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Destination airport | Changi | | Airlines serving | Air Canada, Air France, Alaska Airlines, All Nippon Airways, American Airlines, British Airways, Delta, Emirates, Etihad Airways, JetBlue Airways, KLM, Korean Air, Lufthansa, Malaysia Airlines, Qatar Airways, STARLUX Airlines, SriLankan Airlines, Swiss International Air Lines, Turkish Airlines, United | | Roundtrip price | $849 | | Distance | 9649 mi | ## Book with confidence # Washington to Singapore Flights The cheapest times to fly from Washington to Singapore 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 Washington to Singapore are during the month of April. You can find some of the cheapest flights from Washington to Singapore with Expedia's search tool and vast selection of airlines. The best time to book a flight from Washington to Singapore Sunday is one of the best days to book for cheap flights from Washington to Singapore: 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 Washington to Singapore 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 Washington to Singapore in 2026\. You can also book with separate airlines for your outbound and return journeys, from $445 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 Washington to Singapore 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 Washington to Singapore 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. ## Explore a world of travel with Expedia - Lodging - Packages - Cars - [Hotels near Changi Airport Station ](https://www.expedia.com/Changi-Airport-Station-Hotels.d6163642.Travel-Guide-Hotels) - [Hostels in Changi Airport Station ](https://www.expedia.com/Changi-Airport-Station-Hostels.d6163642-aaHostels.Travel-Guide-Accommodation) - [Cheap Hotels in Changi ](https://www.expedia.com/Changi-Singapore-Hotels-Cheap-Hotels.0-n6359514-0-tCheapHotels.Travel-Guide-Filter-Hotels) - [Family Hotels in Changi ](https://www.expedia.com/Changi-Singapore-Hotels-Family-Hotel.0-n6359514-0-tFamilyHotel.Travel-Guide-Filter-Hotels) - [Hotels with Free Airport Shuttle in Changi ](https://www.expedia.com/Changi-Singapore-Hotels-Hotels-With-Free-Airport-Shuttle.0-n6359514-0-tHotelswithFreeAirportShuttle.Travel-Guide-Filter-Hotels) - [Hotels near Changi ](https://www.expedia.com/Changi-Singapore-Hotels.0-n6359514-0.Travel-Guide-Filter-Hotels) - [Hotels with Laundry Facilities in Changi ](https://www.expedia.com/Changi-Singapore-Hotels-Hotels-With-Laundry-Facilities.0-n6359514-0-tHotelswithLaundryFacilities.Travel-Guide-Filter-Hotels) - [Resorts & Hotels with Spas in Changi ](https://www.expedia.com/Changi-Singapore-Hotels-Spa-Hotel.0-n6359514-0-tSpaHotel.Travel-Guide-Filter-Hotels) - [Hotels with Hot Tubs in Changi ](https://www.expedia.com/Changi-Singapore-Hotels-Hotels-With-Hot-Tubs.0-n6359514-0-tHotelsWithHotTubs.Travel-Guide-Filter-Hotels) - [Historic Hotels in Changi ](https://www.expedia.com/Changi-Singapore-Hotels-Historic-Hotel.0-n6359514-0-tHistoricHotel.Travel-Guide-Filter-Hotels) - [Golf Hotels in Changi ](https://www.expedia.com/Changi-Singapore-Hotels-Golf-Hotel.0-n6359514-0-tGolfHotel.Travel-Guide-Filter-Hotels) - [Luxury Hotels in Changi ](https://www.expedia.com/Changi-Singapore-Hotels-Luxury-Hotel.0-n6359514-0-tLuxuryHotel.Travel-Guide-Filter-Hotels) - [Beach Hotels in Changi ](https://www.expedia.com/Changi-Singapore-Hotels-Beach-Hotel.0-n6359514-0-tBeachHotel.Travel-Guide-Filter-Hotels) - [Hotels with Free Breakfast in Changi ](https://www.expedia.com/Changi-Singapore-Hotels-Hotels-With-Complimentary-Breakfast.0-n6359514-0-tHotelswithComplimentaryBreakfast.Travel-Guide-Filter-Hotels) - [Hotels with Bars in Changi ](https://www.expedia.com/Changi-Singapore-Hotels-Bar-Hotel.0-n6359514-0-tBarHotel.Travel-Guide-Filter-Hotels) - [Hotels with Balconies in Changi ](https://www.expedia.com/Changi-Singapore-Hotels-Hotels-With-Balconies.0-n6359514-0-tHotelswithBalconies.Travel-Guide-Filter-Hotels) - [Hotels near Changi Swimming Pool ](https://www.expedia.com/Changi-Swimming-Pool-Hotels.0-l553248621532741616-0.Travel-Guide-Filter-Hotels) - [5 Star Hotels in Changi ](https://www.expedia.com/5Star-Changi-Singapore-Hotels.s50-n6359514-0.Travel-Guide-Filter-Hotels) - [Aparthotels in Changi Airport Station ](https://www.expedia.com/Changi-Airport-Station-Apart-Hotels.d6163642-aaApartHotels.Travel-Guide-Accommodation) - [Hotel with a Concierge Hotels in Changi ](https://www.expedia.com/Changi-Singapore-Hotels-Hotel-With-A-Concierge.0-n6359514-0-tHotelwithaConcierge.Travel-Guide-Filter-Hotels) - [Hotels & Resorts for Couples in Changi ](https://www.expedia.com/Changi-Singapore-Hotels-Couples-Resorts-Hotels.0-n6359514-0-tCouplesResortsHotels.Travel-Guide-Filter-Hotels) - [Gay friendly Hotels in Changi ](https://www.expedia.com/Changi-Singapore-Hotels-LGBT-Welcoming-Hotel.0-n6359514-0-tLGBTWelcomingHotel.Travel-Guide-Filter-Hotels) - [Hotels with Early Check-in in Changi ](https://www.expedia.com/Changi-Singapore-Hotels-Hotel-With-Early-Check-In.0-n6359514-0-thotelwithearlycheckin.Travel-Guide-Filter-Hotels) - [Hotels with smoking rooms in Changi ](https://www.expedia.com/Changi-Singapore-Hotels-Hotels-With-Smoking-Rooms.0-n6359514-0-tHotelswithsmokingrooms.Travel-Guide-Filter-Hotels) - [Visit Changi ](https://www.expedia.com/Singapore-Changi.dx6359514) - [Changi Vacations ](https://www.expedia.com/Changi.d6359514.Destination-Travel-Guides) - [Car rentals near Slide @ T3 ](https://www.expedia.com/Car-Rentals-In-Slide-T3.d553248621532741614.Car-Rental-Guide) \*Available to One Key members.