Title: CA $515 Cheap Flights from Washington (IAD) to London (LON) - Expedia.ca ![](https://images.trvl-media.com/place/178279/2a1d5619-553b-468a-a773-e81b88024741.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/178279/2a1d5619-553b-468a-a773-e81b88024741.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # CA $515 Cheap Flights from Washington (IAD) to London (LON) [View CA $515 flight on Sun, Aug 23, 2026](https://expedia.ca/Flights-Search?trip=oneway&leg1=from:IAD,to:LHR,departure:23/08/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:514.70&airProductToken=AQpsCjMI1KABEgMyMzQYiBggi5IBKNvxlQMwk_WVAzhMQABYAWoHRElTQ0lOVHIITEwwRFNJMDUKNQjUoAESBDEzNTgYi5IBIOuJASiH-ZUDMKz6lQM4TEAAWAFqB0RJU0NJTlRyCExMMERTSTA1EgoIARABGAEqAlRQGAEiBAgBEAEoAigDKAQwDQ) ## Popular airlines from Washington Dulles International Airport (IAD) to London - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_TP.svg) TAP Portugal [](https://www.expedia.ca/Flights-Search?leg1=from:IAD,to:LON,departure:28/03/2026TANYT&leg2=from:LON,to:IAD,departure:04/04/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"TP"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_BA.svg) British Airways [](https://www.expedia.ca/Flights-Search?leg1=from:IAD,to:LON,departure:28/03/2026TANYT&leg2=from:LON,to:IAD,departure:04/04/2026TANYT&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_EI.svg) Aer Lingus [](https://www.expedia.ca/Flights-Search?leg1=from:IAD,to:LON,departure:28/03/2026TANYT&leg2=from:LON,to:IAD,departure:04/04/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"EI"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AY.svg) Finnair [](https://www.expedia.ca/Flights-Search?leg1=from:IAD,to:LON,departure:28/03/2026TANYT&leg2=from:LON,to:IAD,departure:04/04/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AY"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AC.svg) Air Canada [](https://www.expedia.ca/Flights-Search?leg1=from:IAD,to:LON,departure:28/03/2026TANYT&leg2=from:LON,to:IAD,departure:04/04/2026TANYT&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_VS.svg) Virgin Atlantic [](https://www.expedia.ca/Flights-Search?leg1=from:IAD,to:LON,departure:28/03/2026TANYT&leg2=from:LON,to:IAD,departure:04/04/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"VS"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_LH.svg) Lufthansa [](https://www.expedia.ca/Flights-Search?leg1=from:IAD,to:LON,departure:28/03/2026TANYT&leg2=from:LON,to:IAD,departure:04/04/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"LH"}}]) - ![](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 rewards [Sign in](https://www.expedia.ca/login) ## Cheap flights from Washington (IAD) to London (LON) Prices were available within the past 7 days and start at CA $515 for one-way flights and CA $823 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip ![Scandinavian Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/SK.gif) Sun, Apr 19 - Thu, Apr 23 IAD Washington LHR London CA $823 Roundtrip found 2 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:IAD,to:LHR,departure:19/04/2026TANYT&leg2=from:LHR,to:IAD,departure:23/04/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:822.10&airProductToken=AQpnCjEI05YBEgM5MjYYiBgg4jsolOeKAzDq6ooDOFRAAFgBagZOVVNHSFRyCFRMWEE2R0hUCjII05YBEgM1MDUY4jsg64kBKIztigMwhO6KAzhUQAFYAWoGTlVTR0hUcghUTFhBNkdIVApnCjII05YBEgM1MDAY64kBIOI7KLSLiwMwooyLAzhUQABYAWoGTlVTR0hUcghUTFhBNkdIVAoxCNOWARIDOTI1GOI7IIgYKMmOiwMwzJKLAzhUQAFYAWoGTlVTR0hUcghUTFhBNkdIVBIKCAEQARgBKgJTSxgBIgQIARABKAIoAygEMA8) ![TAP Portugal](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/TP.gif) Mon, Apr 20 - Tue, Apr 28 IAD Washington LHR London CA $834 Roundtrip found 5 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:IAD,to:LHR,departure:20/04/2026TANYT&leg2=from:LHR,to:IAD,departure:28/04/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:834.00&airProductToken=AQpsCjMI1KABEgMyMzQYiBggi5IBKLvzigMw8_aKAzhPQABYAWoHRElTQ0lOVHIIT0YwRFNJSDcKNQjUoAESBDEzNTgYi5IBIOuJASjn-ooDMIz8igM4T0AAWAFqB0RJU0NJTlRyCE9GMERTSUg3CmwKNQjUoAESBDEzNjkY64kBIIuSASjqyYsDMJTLiwM4RUAAWAFqB0RJU0NJTlRyCEVMMERTSTcxCjMI1KABEgMyMzMYi5IBIIgYKO_TiwMw49eLAzhFQABYAWoHRElTQ0lOVHIIRUwwRFNJNzESCggBEAEYASoCVFAYASIECAEQASgCKAMoBDAN) ![TAP Portugal](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/TP.gif) Tue, Apr 28 - Tue, May 19 IAD Washington LGW London CA $860 Roundtrip found 1 hour ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:IAD,to:LGW,departure:28/04/2026TANYT&leg2=from:LGW,to:IAD,departure:19/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:859.60&airProductToken=AQp4CjMI1KABEgMyMzIYiBggi5IBKPHKiwMwrs6LAzhFQABYAWoHRElTQ0lOVHIIRUswRFNJNzEKQQjUoAESBDEzMzYYi5IBIMuxASjm0YsDMIvTiwM4RUAAWAFqB0RJU0NJTlRyCEVLMERTSTcxegoIzpIBEgQxMzM2CngKQQjUoAESBDEzMzcYy7EBIIuSASi9tI0DMPG1jQM4T0AAWAFqB0RJU0NJTlRyCE9GMERTSUg3egoIzpIBEgQxMzM3CjMI1KABEgMyMzEYi5IBIIgYKMC9jQMwvsGNAzhPQABYAWoHRElTQ0lOVHIIT0YwRFNJSDcSCggBEAEYASoCVFAYASIECAEQASgCKAMoBDAN) ![Icelandair](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/fi.gif) Tue, Apr 28 - Tue, May 19 IAD Washington LGW London CA $914 Roundtrip found 1 hour ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:IAD,to:LGW,departure:28/04/2026TANYT&leg2=from:LGW,to:IAD,departure:19/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:913.32&airProductToken=AQplCjAIxpIBEgM2NDQYiBggiikovsyLAzChz4sDOE5AAFgBagVMSUdIVHIITkoyUVVTTFQKMQjGkgESAzQ3MhiKKSDLsQEoltGLAzDU0osDOE5AAVgBagVMSUdIVHIITkoyUVVTTFQKZQoxCMaSARIDNDczGMuxASCKKSiQtI0DMNO1jQM4TkAAWAFqBUxJR0hUcghOSjJRVVNMVAowCMaSARIDNjQ1GIopIIgYKLLAjQMwuMONAzhOQAFYAWoFTElHSFRyCE5KMlFVU0xUEgoIARABGAEqAkZJGAEiBAgBEAEoAigDKAQwAQ) ![Virgin Atlantic](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/VS.gif) Wed, Mar 25 - Tue, Mar 31 IAD Washington LHR London CA $935 Roundtrip found 6 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:IAD,to:LHR,departure:25/03/2026TANYT&leg2=from:LHR,to:IAD,departure:31/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:935.00&airProductToken=AQpECiAI1qYBEgQ0NDczGIgYIOBcKNfLiAMw0cyIAzhUQABYAQogCNamARIDMTA0GOBcIOuJASiGzYgDMOHQiAM4VEABWAEKRwoiCNamARIENzA0OBjriQEggJMBKJeKiQMw7IqJAzhUQABYAQohCNamARIENzEyMRiAkwEgiBgoo4uJAzCXj4kDOFRAAVgBEgoIARABGAEqAlZTGAEiBAgBEAEoBDAB) ![Aer Lingus](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/EI.gif) Mon, Apr 20 - Tue, Apr 28 IAD Washington LHR London CA $941 Roundtrip found 5 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:IAD,to:LHR,departure:20/04/2026TANYT&leg2=from:LHR,to:IAD,departure:28/04/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:940.02&airProductToken=AQpjCi8IxZIBEgMxMTgYiBgggw0o1_KKAzD79YoDOE9AAFgBagRTQVZScghPTFg0RDFCVgowCMWSARIDMTY0GIMNIOuJASi094oDMI74igM4R0ABWAFqBFNBVlJyCE9MWDREMUJWCmMKMAjFkgESAzE2MxjriQEggw0o6caLAzC-x4sDOEdAAFgBagRTQVZScghPTFg0RDFCVgovCMWSARIDMTE5GIMNIIgYKKfIiwMwh8yLAzhPQAFYAWoEU0FWUnIIT0xYNEQxQlYSCggBEAEYASoCRUkYASIECAEQASgCKAMoBDAN) ![KLM](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/KL.gif) Wed, Apr 15 - Thu, Apr 30 IAD Washington LHR London CA $956 Roundtrip found 6 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:IAD,to:LHR,departure:15/04/2026TANYT&leg2=from:LHR,to:IAD,departure:30/04/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:955.75&airProductToken=AQpACj4Iy5gBEgQ0ODI1GIgYIOuJASivu4oDMOy-igM4VkAAWAFqBUxJR0hUcghWTFg0Nk5CTHoKCNamARIENDgyNQpoCjMIy5gBEgQxMDA0GOuJASCAkwEo19uLAzCs3IsDOExAAFgBagVMSUdIVHIIVkxYNDZOQkwKMQjLmAESAzY1MRiAkwEgiBgo49yLAzDX4IsDOFZAAVgBagVMSUdIVHIIVkxYNDZOQkwSCggBEAEYASoCS0wYASIECAEQASgCKAMoBDAN) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Wed, Apr 15 - Wed, Apr 22 IAD Washington LHR London CA $956 Roundtrip found 6 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:IAD,to:LHR,departure:15/04/2026TANYT&leg2=from:LHR,to:IAD,departure:22/04/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:955.75&airProductToken=AQp7CjUIxJgBEgQyMTM1GIgYIOBcKNS3igMwvbiKAzhFQABYAWoJTUFJTkJBU0lDcghWTFg0Nk5CTApCCMSYARIENTk5OBjgXCDriQEol7mKAzD3vIoDOEVAAVgBaglNQUlOQkFTSUNyCFZMWDQ2TkJMegoI1qYBEgQ1OTk4CokBCkMIxJgBEgQ5NTk2GOuJASCAkwEo14GLAzCsgosDOEVAAFgBaglNQUlOQkFTSUNyCFZMWDQ2TkJMegoIy5gBEgQ5NTk2CkIIxJgBEgQ5Mzg0GICTASCIGCjjgosDMNeGiwM4RUABWAFqCU1BSU5CQVNJQ3IIVkxYNDZOQkx6CgjLmAESBDkzODQSCggBEAEYASoCREwYASIECAEQASgCKAMoBDAB) ![Air France](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AF.gif) Wed, Apr 15 - Thu, Apr 30 IAD Washington LHR London CA $966 Roundtrip found 6 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:IAD,to:LHR,departure:15/04/2026TANYT&leg2=from:LHR,to:IAD,departure:30/04/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:965.45&airProductToken=AQpACj4IwYwBEgQ5NjUyGIgYIOuJASivu4oDMOy-igM4VkAAWAFqBUxJR0hUcghWTFg0Nk5CTHoKCNamARIEOTY1MgplCjIIwYwBEgQxNjgxGOuJASDiMCib24sDMOvbiwM4TEAAWAFqBUxJR0hUcghWTFg0Nk5CTAovCMGMARICNTAY4jAgiBgo7dyLAzD14IsDOFZAAVgBagVMSUdIVHIIVkxYNDZOQkwSCggBEAEYASoCQUYYASIECAEQASgCKAMoBDAN) ![British Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/BA.gif) Sun, Mar 22 - Tue, Mar 31 IAD Washington LHR London CA $973 Roundtrip found 6 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:IAD,to:LHR,departure:22/03/2026TANYT&leg2=from:LHR,to:IAD,departure:31/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:972.40&airProductToken=AQozCjEIwoIBEgMyMTYYiBgg64kBKNiriAMwhq-IAzhPQABYAWoFTk9CQUdyCE9MWDREMUJWCjMKMQjCggESAzI5MxjriQEgiBgoxY2JAzCqkYkDOE9AAFgBagVOT0JBR3IIT0xYNEQxQlYSCggBEAEYASoCQkEYASIECAEQASgCKAMwDQ) ![](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.ca/deals?rfrr=FTG_SPRING_PROMO_) ## Alternative airports near London Prices were available within the past 7 days. Prices and availability are subject to change. [](https://www.expedia.ca/Flights-Search?leg1=from:IAD,to:LHR,departure:28/03/2026TANYT&leg2=from:LHR,to:IAD,departure:02/04/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) LHR Heathrow Cheapest 28 min [Flights from CA $2,176 ](https://www.expedia.ca/Flights-Search?leg1=from:IAD,to:LHR,departure:28/03/2026TANYT&leg2=from:LHR,to:IAD,departure:02/04/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) [](https://www.expedia.ca/Flights-Search?leg1=from:IAD,to:LGW,departure:28/03/2026TANYT&leg2=from:LGW,to:IAD,departure:31/03/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) LGW Gatwick 52 min [Flights from CA $2,638 ](https://www.expedia.ca/Flights-Search?leg1=from:IAD,to:LGW,departure:28/03/2026TANYT&leg2=from:LGW,to:IAD,departure:31/03/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) [](https://www.expedia.ca/Flights-Search?leg1=from:IAD,to:LCY,departure:28/03/2026TANYT&leg2=from:LCY,to:IAD,departure:31/03/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) LCY London City Closest 21 min [Flights from CA $2,484 ](https://www.expedia.ca/Flights-Search?leg1=from:IAD,to:LCY,departure:28/03/2026TANYT&leg2=from:LCY,to:IAD,departure:31/03/2026TANYT&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 London (LON) ### March is typically the cheapest month to fly From CA $541 - CA $1,140 per traveller. ## Frequently asked questions ### How much is a flight from IAD to London (LON-All Airports)? ### Do I need to pay a cancellation fee if I cancel my flight from IAD to London (LON-All Airports)? ### How do I find cheap flights from Dulles Intl. Airport to London (LON-All Airports) that have flexible change policies? ### How far is the flight from IAD to London (LON-All Airports)? ### Which airlines fly direct from Washington Dulles Intl. Airport (IAD) to London (LON-All Airports)? ### Are Dulles Intl. Airport to London (LON-All Airports) flight tickets cheaper when they're purchased at the last minute? ## Travel information | Origin airport | Washington Dulles Intl. | | ------------------- | ----------------------- | | Destination airport | Heathrow | | Roundtrip price | CA $822 | | Distance | 5866 km | ## Book with confidence # Chantilly to England Flights **The easy way to book your flights from Washington to London** With Expedia, it’s simple to find and book flights to London from Washington whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to LON-All Airports, too. Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Washington to London today, tomorrow, or this week. **Save dollars with cheap flights from Washington Dulles Intl., IAD to LON-All Airports, LON** Sort your search results by price to find great deals on your flight from Washington to London—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to London from Washington currently is just CA $823 rising to CA $973\. Here are more money-saving tips: - Fly in April when flight prices are normally at their lowest - Book about a month to 6 weeks before you travel for the best prices to London - Avoid peak season and weekends when flights can cost more - Early morning and late-night flights are sometimes cheaper, so try varying your travel times - One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! **Reasons to choose Expedia for your flight to London from Washington** Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to London with Expedia today. \*Available to Expedia members.