Title: $355 Cheap flights from Basel to Washington (BSL to IAD) - Expedia.com ![Washington DC in Spring](https://images.trvl-media.com/place/3763/58eb1a51-e7f1-4f17-88af-21174d495e42.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/3763/58eb1a51-e7f1-4f17-88af-21174d495e42.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # $355 Cheap Flights from Basel (BSL) to Washington (IAD) [View $355 flight on Mon, Aug 31, 2026](https://expedia.com/Flights-Search?trip=oneway&leg1=from:BSL,to:IAD,departure:8/31/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:354.03&airProductToken=AQpoCjIIwoIBEgM3NjEYwVwg64kBKILElgMw8MSWAzhPQABYAWoFTk9CQUdyCU9MTjVDNUI0UAoyCMKCARIDMjkzGOuJASCIGCjlxpYDMNTKlgM4T0ABWAFqBU5PQkFHcglPTE41QzVCNFASCggBEAEYASoCQkEYASIECAEQASgCKAMwDQ) - [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 EuroAirport Airport (BSL) to Washington Dulles Intl. Airport (IAD) - ![](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:BSL,to:IAD,departure:3/5/2026TANYT&leg2=from:IAD,to:BSL,departure:3/12/2026TANYT&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_TK.svg) Turkish Airlines [](https://www.expedia.com/Flights-Search?leg1=from:BSL,to:IAD,departure:3/5/2026TANYT&leg2=from:IAD,to:BSL,departure:3/12/2026TANYT&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_AF.svg) Air France [](https://www.expedia.com/Flights-Search?leg1=from:BSL,to:IAD,departure:3/5/2026TANYT&leg2=from:IAD,to:BSL,departure:3/12/2026TANYT&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_KL.svg) KLM [](https://www.expedia.com/Flights-Search?leg1=from:BSL,to:IAD,departure:3/5/2026TANYT&leg2=from:IAD,to:BSL,departure:3/12/2026TANYT&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_AA.svg) American Airlines [](https://www.expedia.com/Flights-Search?leg1=from:BSL,to:IAD,departure:3/5/2026TANYT&leg2=from:IAD,to:BSL,departure:3/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![](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:BSL,to:IAD,departure:3/5/2026TANYT&leg2=from:IAD,to:BSL,departure:3/12/2026TANYT&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_DL.svg) Delta [](https://www.expedia.com/Flights-Search?leg1=from:BSL,to:IAD,departure:3/5/2026TANYT&leg2=from:IAD,to:BSL,departure:3/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) - ![](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 Basel to Washington (BSL-IAD) Prices were available within the past 7 days and start at $355 for one-way flights and $600 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip ![Lufthansa](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LH.gif) Wed, Apr 1 - Wed, Apr 8 BSL Basel IAD Washington $600 Roundtrip found 3 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:BSL,to:IAD,departure:4/1/2026TANYT&leg2=from:IAD,to:BSL,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:599.53&airProductToken=AQqDAQpACMyQARIEMTIwMxjBXCClBCjGlYkDMIKWiQM4S0AAWAFqCEVDT0xJR0hUcghLUFZQQVhCUXoKCMWcARIEMTIwMwo_CMyQARIEOTI1MhilBCCIGCiumIkDMLuciQM4S0ABWAFqCEVDT0xJR0hUcghLUFZQQVhCUXoJCNWCARIDOTMzCoMBCj8IzJABEgQ5MjgxGIgYIIwVKIXqiQMw-e2JAzhLQABYAWoIRUNPTElHSFRyCEtQVlBBWEJRegkI1YIBEgMxMDgKQAjMkAESBDIzOTYYjBUgwVwo2u-JAzCR8IkDOEtAAVgBaghFQ09MSUdIVHIIS1BWUEFYQlF6CgjDmAESBDIzOTYSCggCEAEYAioCTEgYASIECAEQASgCKAMoBDAL) ![Lufthansa](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LH.gif) Wed, Apr 1 - Wed, Apr 8 BSL Basel IAD Washington $607 Roundtrip found 3 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:BSL,to:IAD,departure:4/1/2026TANYT&leg2=from:IAD,to:BSL,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:606.43&airProductToken=AQprCjQIzJABEgQxMjAxGMFcIKUEKKGUiQMw3ZSJAzhLQABYAWoIRUNPTElHSFRyCEtQVlBBWEJRCjMIzJABEgM0MTgYpQQgiBgovpaJAzDVmokDOEtAAVgBaghFQ09MSUdIVHIIS1BWUEFYQlEKgwEKPwjMkAESBDkyNTMYiBggpQQoneyJAzCC8IkDOEtAAFgBaghFQ09MSUdIVHIIS1BWUEFYQlF6CQjVggESAzkzMgpACMyQARIEMTIwNhilBCDBXCiu8okDMOryiQM4S0ABWAFqCEVDT0xJR0hUcghLUFZQQVhCUXoKCMWcARIEMTIwNhIKCAIQARgCKgJMSBgBIgQIARABKAIoAygEMAs) ![Lufthansa](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LH.gif) Wed, Apr 1 - Wed, Apr 8 BSL Basel IAD Washington $607 Roundtrip found 3 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:BSL,to:IAD,departure:4/1/2026TANYT&leg2=from:IAD,to:BSL,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:606.73&airProductToken=AQp3CkAIzJABEgQyMzk1GMFcIIwVKPaUiQMwspWJAzhLQABYAWoIRUNPTElHSFRyCEtQVlBBWEJRegoIw5gBEgQyMzk1CjMIzJABEgM0MTQYjBUgiBgo_JeJAzCdnIkDOEtAAVgBaghFQ09MSUdIVHIIS1BWUEFYQlEKgwEKPwjMkAESBDkyODEYiBggjBUoheqJAzD57YkDOEtAAFgBaghFQ09MSUdIVHIIS1BWUEFYQlF6CQjVggESAzEwOApACMyQARIEMjM5NhiMFSDBXCja74kDMJHwiQM4S0ABWAFqCEVDT0xJR0hUcghLUFZQQVhCUXoKCMOYARIEMjM5NhIKCAIQARgCKgJMSBgBIgQIARABKAIoAygEMAs) ![Austrian Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/OS.gif) Wed, Apr 1 - Wed, Apr 8 BSL Basel IAD Washington $612 Roundtrip found 3 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:BSL,to:IAD,departure:4/1/2026TANYT&leg2=from:IAD,to:BSL,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:611.13&airProductToken=AQp0Cj4Iz6YBEgMxMjgYwVwglSIo4pmJAzC3mokDOEtAAFgBaghFQ09MSUdIVHIIS1BWUEFYQlF6CQjCqAESAzEyOAoyCM-mARICNDEYlSIgiBgo0qCJAzCbpYkDOEtAAVgBaghFQ09MSUdIVHIIS1BWUEFYQlEKgwEKPwjMkAESBDk0MTEYiBggpQQo--mJAzDg7YkDOEtAAFgBaghFQ09MSUdIVHIIS1BWUEFYQlF6CQjVggESAzk4OQpACMyQARIEMTIwNhilBCDBXCiu8okDMOryiQM4S0ABWAFqCEVDT0xJR0hUcghLUFZQQVhCUXoKCMWcARIEMTIwNhIKCAIQARgCKgJPUxgBIgQIARABKAIoAygEMAs) ![Lufthansa](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LH.gif) Wed, Apr 1 - Wed, Apr 8 BSL Basel IAD Washington $614 Roundtrip found 3 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:BSL,to:IAD,departure:4/1/2026TANYT&leg2=from:IAD,to:BSL,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:613.63&airProductToken=AQp3CkAIzJABEgQyMzk3GMFcIIwVKLSWiQMw8JaJAzhLQABYAWoIRUNPTElHSFRyCEtQVlBBWEJRegoIw5gBEgQyMzk3CjMIzJABEgM0MTQYjBUgiBgo_JeJAzCdnIkDOEtAAVgBaghFQ09MSUdIVHIIS1BWUEFYQlEKgwEKPwjMkAESBDk0MTEYiBggpQQo--mJAzDg7YkDOEtAAFgBaghFQ09MSUdIVHIIS1BWUEFYQlF6CQjVggESAzk4OQpACMyQARIEMTIwNBilBCDBXCig8IkDMNzwiQM4S0ABWAFqCEVDT0xJR0hUcghLUFZQQVhCUXoKCMWcARIEMTIwNBIKCAIQARgCKgJMSBgBIgQIARABKAIoAygEMAs) ![Air Canada](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AC.gif) Wed, Apr 1 - Wed, Apr 8 BSL Basel IAD Washington $619 Roundtrip found 3 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:BSL,to:IAD,departure:4/1/2026TANYT&leg2=from:IAD,to:BSL,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:618.13&airProductToken=AQqyAQo9CMGGARIEOTA4NxjBXCClBCidl4kDMNmXiQM4S0AAWAFqBUJBU0lDcghLUFZQQVhCUXoKCMyQARIEMTIwNQoxCMGGARIDODQzGKUEIJjOASipmIkDMKeciQM4S0ABWAFqBUJBU0lDcghLUFZQQVhCUQo-CMGGARIEMzkzNxiYzgEgiBgo76KJAzDSo4kDOEtAAVgBagVCQVNJQ3IIS1BWUEFYQlF6CgjVggESBDM2MzYKpAEKMQjBhgESBDg3MjYYiBggmF0ow-aJAzCq54kDOEtAAFgBagVCQVNJQ3IIS1BWUEFYQlEKMAjBhgESAzg0NBiYXSClBCjG6okDMI3uiQM4S0ABWAFqBUJBU0lDcghLUFZQQVhCUQo9CMGGARIEOTAxMBilBCDBXCjT7okDMI_viQM4S0ABWAFqBUJBU0lDcghLUFZQQVhCUXoKCMyQARIEMTIwMhIKCAIQARgCKgJBQxgBIgQIARABKAIoAygEMA0) ![Lufthansa](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LH.gif) Wed, Apr 1 - Wed, Apr 8 BSL Basel IAD Washington $621 Roundtrip found 3 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:BSL,to:IAD,departure:4/1/2026TANYT&leg2=from:IAD,to:BSL,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:620.23&airProductToken=AQqDAQpACMyQARIEMTIwNxjBXCClBCiNmYkDMMmZiQM4S0AAWAFqCEVDT0xJR0hUcghLUFZQQVhCUXoKCMWcARIEMTIwNwo_CMyQARIEOTI1MhilBCCIGCjOo4kDMNuniQM4S0ABWAFqCEVDT0xJR0hUcghLUFZQQVhCUXoJCNWCARIDOTMzCoMBCj8IzJABEgQ5MjgxGIgYIIwVKIXqiQMw-e2JAzhLQABYAWoIRUNPTElHSFRyCEtQVlBBWEJRegkI1YIBEgMxMDgKQAjMkAESBDI0MDAYjBUgwVwojfOJAzDE84kDOEtAAVgBaghFQ09MSUdIVHIIS1BWUEFYQlF6CgjDmAESBDI0MDASCggCEAEYAioCTEgYASIECAEQASgCKAMoBDAL) ![Air Canada](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AC.gif) Wed, Apr 1 - Wed, Apr 8 BSL Basel IAD Washington $624 Roundtrip found 3 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:BSL,to:IAD,departure:4/1/2026TANYT&leg2=from:IAD,to:BSL,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:623.03&airProductToken=AQqyAQo9CMGGARIEOTA4NxjBXCClBCidl4kDMNmXiQM4S0AAWAFqBUJBU0lDcghLUFZQQVhCUXoKCMyQARIEMTIwNQoxCMGGARIDODQzGKUEIJjOASipmIkDMKeciQM4S0ABWAFqBUJBU0lDcghLUFZQQVhCUQo-CMGGARIEMzkzNxiYzgEgiBgo76KJAzDSo4kDOEtAAVgBagVCQVNJQ3IIS1BWUEFYQlF6CgjVggESBDM2MzYKpgEKMgjBhgESBDg2MTcYiBggmM4BKIzmiQMw4-aJAzhLQABYAWoFQkFTSUNyCEtQVlBBWEJRCjEIwYYBEgM4NDAYmM4BIKUEKNPpiQMwru2JAzhLQAFYAWoFQkFTSUNyCEtQVlBBWEJRCj0IwYYBEgQ5MDEwGKUEIMFcKNPuiQMwj--JAzhLQAFYAWoFQkFTSUNyCEtQVlBBWEJRegoIzJABEgQxMjAyEgoIAhABGAIqAkFDGAEiBAgBEAEoAigDKAQwDQ) ![British Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/BA.gif) Thu, Mar 19 - Tue, Mar 24 BSL Basel IAD Washington $677 Roundtrip found 13 hours ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:BSL,to:IAD,departure:3/19/2026TANYT&leg2=from:IAD,to:BSL,departure:3/24/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:676.03&airProductToken=AQpoCjIIwoIBEgM3NjMYwVwg64kBKNuHiAMwv4iIAzhRQABYAWoFTk9CQUdyCVFMTjdDOEI0UAoyCMKCARIDMjE3GOuJASCIGCj6j4gDMPOTiAM4UUABWAFqBU5PQkFHcglRTE43QzhCNFAKaAoyCMKCARIDMjE2GIgYIOuJASiYwogDMMbFiAM4T0AAWAFqBU5PQkFHcglPTE40QzhCNFAKMgjCggESAzc1OBjriQEgwVwopMiIAzCNyYgDOE9AAVgBagVOT0JBR3IJT0xONEM4QjRQEgoIARABGAEqAkJBGAEiBAgBEAEoAigDMA0) ![Air Dolomiti](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/EN.gif) Sat, Mar 21 - Sun, Apr 5 BSL Basel IAD Washington $925 Roundtrip found 15 hours ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:BSL,to:IAD,departure:3/21/2026TANYT&leg2=from:IAD,to:BSL,departure:4/5/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:924.93&airProductToken=AQqYAQoxCMWcARIEODExMxjBXCClBCiUmIgDMNWYiAM4VEAAWAFqBUJBU0lDcghTWFZYS1hCUQowCMGGARIDODQ1GKUEIJhdKM2ZiAMwxp2IAzhTQAFYAWoFQkFTSUNyCFNYVlhLWEJRCjEIwYYBEgQ4NzIzGJhdIIgYKKSgiAMwlqGIAzhTQAFYAWoFQkFTSUNyCFNYVlhLWEJRCmsKMwjMkAESAzQxNRiIGCCMFSjMyokDMLbOiQM4S0AAWAFqCEVDT0xJR0hUcghLWFZQS1hCUQo0CMyQARIEMjQwMBiMFSDBXCit0YkDMOTRiQM4S0ABWAFqCEVDT0xJR0hUcghLWFZQS1hCURIMCAEQARgBKgJBQzIAGAEiBAgBEAEoAigDKAQwAQ) ![](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_) ## Frequently asked questions ### How much does a flight from Basel (BSL-EuroAirport) to Washington, DC (IAD-Washington Dulles Intl.) cost? ### What is the cheapest month to fly from Basel (BSL-EuroAirport) to Washington, DC (IAD-Washington Dulles Intl.)? ### Which airlines fly direct from Basel (BSL-EuroAirport) to Washington, DC (IAD-Washington Dulles Intl.)? ### What is the cheapest airline that flies from Basel (BSL-EuroAirport) to Washington, DC (IAD-Washington Dulles Intl.)? ### How do I find cheap flights from Basel (BSL-EuroAirport) to Washington, DC (IAD-Washington Dulles Intl.)? ### What is the best time to fly from Basel (BSL-EuroAirport) to Washington, DC (IAD-Washington Dulles Intl.)? ### What is the earliest flight from Basel (BSL-EuroAirport) to Washington, DC (IAD-Washington Dulles Intl.)? ### What day of the week has the most flights from Basel (BSL-EuroAirport) to Washington, DC (IAD-Washington Dulles Intl.)? ### What are the most popular departure times for flights from Basel (BSL-EuroAirport) to Washington, DC (IAD-Washington Dulles Intl.)? ### How long does it take to fly from Basel (BSL-EuroAirport) to Washington, DC (IAD-Washington Dulles Intl.)? ### Can you fly business or first class from Basel (BSL-EuroAirport) to Washington, DC (IAD-Washington Dulles Intl.)? > - Lufthansa > - Air Dolomiti > - Swiss International Air Lines > - Air France > - British Airways > - KLM > - Hop! > - Turkish Airlines ### How do I earn miles on a Basel (BSL-EuroAirport) to Washington, DC (IAD-Washington Dulles Intl.) flight with Expedia? ### What airports do you fly into for Washington from EuroAirport Basel (BSL)? ### Is it cheaper to buy a plane ticket from Basel (BSL-EuroAirport) to Washington, DC (IAD-Washington Dulles Intl.) at the last minute? ### Is it cheaper to book a Basel (BSL-EuroAirport) to Washington, DC (IAD-Washington Dulles Intl.) flight and hotel package? ### Can I cancel or change the date of my flight from Basel (BSL-EuroAirport) to Washington, DC (IAD-Washington Dulles Intl.)? ## Travel information | Origin airport | EuroAirport | | ------------------- | -------------------------------------------- | | Destination airport | Washington Dulles Intl. | | Airlines serving | British Airways, Lufthansa, Turkish Airlines | | Roundtrip price | $600 | | Distance | 4098 mi | ## Book with confidence # Basel to Washington Flights The cheapest times to fly from Basel to Washington 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 Basel to Washington are during the month of April. You can find some of the cheapest flights from Basel to Washington with Expedia's search tool and vast selection of airlines. The best time to book a flight from Basel to Washington Sunday is one of the best days to book for cheap flights from Basel to Washington: 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 Basel to Washington 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 Basel to Washington in 2026\. You can also book with separate airlines for your outbound and return journeys, from $355 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 Basel to Washington 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 Basel to Washington 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\. 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