Title: CA $322 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 $322 Cheap Flights from Washington (IAD) to London (LON) [View CA $322 flight on Sun, Nov 16, 2025](https://expedia.ca/Flights-Search?trip=oneway&leg1=from:IAD,to:LHR,departure:16/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:322.00&airProductToken=AQpsCjMI1KABEgMyMzQYiBggi5IBKJKk_QIwu6f9AjhUQABYAWoHRElTQ0lOVHIIVEYwRFNJMDkKNQjUoAESBDEzNjYYi5IBIOuJASjmq_0CMJCt_QI4VEAAWAFqB0RJU0NJTlRyCFRGMERTSTA5EgoIARABGAEqAlRQGAEiBAgBEAEoAigDKAQwDQ) - [Roundtrip](?flightType=roundtrip) - [One-way](?flightType=oneway) - [Multi-city](?flightType=multicity) ### Travellers 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 International Airport (IAD) to London - ![TAP Portugal](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:23/10/2025TANYT&leg2=from:lon,to:iad,departure:30/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"TP"}}]) - ![British Airways](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:23/10/2025TANYT&leg2=from:lon,to:iad,departure:30/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"BA"}}]) - ![Aer Lingus](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:23/10/2025TANYT&leg2=from:lon,to:iad,departure:30/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"EI"}}]) - ![Austrian Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_OS.svg) Austrian Airlines [](https://www.expedia.ca/Flights-Search?leg1=from:iad,to:lon,departure:23/10/2025TANYT&leg2=from:lon,to:iad,departure:30/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"OS"}}]) - ![Lufthansa](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:23/10/2025TANYT&leg2=from:lon,to:iad,departure:30/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"LH"}}]) - ![Iberia](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_IB.svg) Iberia [](https://www.expedia.ca/Flights-Search?leg1=from:iad,to:lon,departure:23/10/2025TANYT&leg2=from:lon,to:iad,departure:30/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"IB"}}]) - ![Finnair](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:23/10/2025TANYT&leg2=from:lon,to:iad,departure:30/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AY"}}]) ![notification illustration](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\* ![deals illustration](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\* ![trophy illustration](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 $322 for one-way flights and CA $627 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip ![TAP Portugal](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/TP.gif) Thu, Feb 5 - Mon, Feb 9 IAD Washington LHR London CA $627 Roundtrip found 6 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:IAD,to:LHR,departure:05/02/2026TANYT&leg2=from:LHR,to:IAD,departure:09/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:626.70&airProductToken=AQpsCjMI1KABEgMyMzIYiBggi5IBKIaxhAMwr7SEAzhPQABYAWoHRElTQ0lOVHIIT0YwRFNJSDcKNQjUoAESBDEzNjQYi5IBIOuJASiluYQDMM-6hAM4T0AAWAFqB0RJU0NJTlRyCE9GMERTSUg3CmwKNQjUoAESBDEzNjMY64kBIIuSASio1oQDMM3XhAM4T0AAWAFqB0RJU0NJTlRyCE9GMERTSUg3CjMI1KABEgMyMzEYi5IBIIgYKO3YhAMw_9yEAzhPQABYAWoHRElTQ0lOVHIIT0YwRFNJSDcSCggBEAEYASoCVFAYASIECAEQASgCKAMoBDAN) ![TAP Portugal](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/TP.gif) Sun, Nov 16 - Tue, Nov 25 IAD Washington LGW London CA $633 Roundtrip found 9 hours ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:IAD,to:LGW,departure:16/11/2025TANYT&leg2=from:LGW,to:IAD,departure:25/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:632.70&airProductToken=AQpsCjMI1KABEgMyMzQYiBggi5IBKJKk_QIwu6f9AjhPQABYAWoHRElTQ0lOVHIIT0YwRFNJSDcKNQjUoAESBDEzMzYYi5IBIMuxASjMqP0CMPGp_QI4T0AAWAFqB0RJU0NJTlRyCE9GMERTSUg3CmwKNQjUoAESBDEzMzcYy7EBIIuSASijhP4CMM2F_gI4T0AAWAFqB0RJU0NJTlRyCE9GMERTSUg3CjMI1KABEgMyMzMYi5IBIIgYKOuP_gIw-JP-AjhPQABYAWoHRElTQ0lOVHIIT0YwRFNJSDcSCggBEAEYASoCVFAYASIECAEQASgCKAMoBDAN) ![Scandinavian Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/SK.gif) Thu, Feb 5 - Mon, Feb 9 IAD Washington LHR London CA $736 Roundtrip found 6 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:IAD,to:LHR,departure:05/02/2026TANYT&leg2=from:LHR,to:IAD,departure:09/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:735.16&airProductToken=AQplCjAI05YBEgM5MjYYiBgg4jsourKEAzCftoQDOFRAAFgBagVMSUdIVHIIVENBRTZHSFQKMQjTlgESAzUwNRjiOyDriQEoo7iEAzCguYQDOFRAAVgBagVMSUdIVHIIVENBRTZHSFQKZQoxCNOWARIDNTAyGOuJASDiOyis2IQDMJrZhAM4VEAAWAFqBUxJR0hUcghUQ0FFNkdIVAowCNOWARIDOTI1GOI7IIgYKMfZhAMw992EAzhUQAFYAWoFTElHSFRyCFRDQUU2R0hUEgoIARABGAEqAlNLGAEiBAgBEAEoAigDKAQwAQ) ![Icelandair](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/fi.gif) Sun, Nov 30 - Tue, Dec 9 IAD Washington LGW London CA $755 Roundtrip found 1 day ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:IAD,to:LGW,departure:30/11/2025TANYT&leg2=from:LGW,to:IAD,departure:09/12/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:754.18&airProductToken=AQplCjAIxpIBEgM2NDQYiBggiikoqMD-AjCLw_4COE5AAFgBagVMSUdIVHIITkoyUVVTTFQKMQjGkgESAzQ3MBiKKSDLsQEozMP-AjCPxf4COE5AAVgBagVMSUdIVHIITkoyUVVTTFQKZQoxCMaSARIDNDcxGMuxASCKKSjLn_8CMJih_wI4TkAAWAFqBUxJR0hUcghOSjJRVVNMVAowCMaSARIDNjQ1GIopIIgYKPKh_wIwgqX_AjhOQAFYAWoFTElHSFRyCE5KMlFVU0xUEgoIARABGAEqAkZJGAEiBAgBEAEoAigDKAQwAQ) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Wed, Nov 5 - Tue, Nov 25 IAD Washington LHR London CA $846 Roundtrip found 18 hours ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:IAD,to:LHR,departure:05/11/2025TANYT&leg2=from:LHR,to:IAD,departure:25/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:845.90&airProductToken=AQoiCiAI1YIBEgM5MTgYiBgg64kBKLim_AIw8Kn8AjhMQABYAQpGCiII1YIBEgQ5OTI0GOuJASChpAEo2v_9AjCbgP4COExAAFgBCiAI1YIBEgM5NTEYoaQBIIgYKM-B_gIw14X-AjhMQAFYARIKCAEQARgBKgJVQRgBIgQIARABKAQwAQ) ![KLM](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/KL.gif) Wed, Oct 22 - Mon, Oct 27 IAD Washington LHR London CA $847 Roundtrip found 5 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:IAD,to:LHR,departure:22/10/2025TANYT&leg2=from:LHR,to:IAD,departure:27/10/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:846.47&airProductToken=AQo0CjIIy5gBEgQ0ODE3GIgYIOuJASjGiPsCMIiM-wI4VkAAWAFqBUxJR0hUcghWTFg0Nk5CTApoCjMIy5gBEgQxMDE2GOuJASCAkwEo6b_7AjC0wPsCOExAAFgBagVMSUdIVHIIVkxYNDZOQkwKMQjLmAESAzY1MRiAkwEgiBgopMf7AjCxy_sCOFZAAVgBagVMSUdIVHIIVkxYNDZOQkwSCggBEAEYASoCS0wYASIECAEQASgCKAMoBDAN) ![Aer Lingus](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/EI.gif) Mon, Feb 9 - Thu, Feb 26 IAD Washington LHR London CA $852 Roundtrip found 22 hours ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:IAD,to:LHR,departure:09/02/2026TANYT&leg2=from:LHR,to:IAD,departure:26/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:851.60&airProductToken=AQpjCi8IxZIBEgMxMTYYiBgggw0o7d2EAzCH4YQDOE9AAFgBagRTQVZScghPTFg0RDFCVgowCMWSARIDMTY0GIMNIOuJASi15IQDMIXlhAM4UEABWAFqBFNBVlJyCE9MWDREMUJWCmMKMAjFkgESAzE1MRjriQEggw0otpaGAzCGl4YDOFBAAFgBagRTQVZScghPTFg0RDFCVgovCMWSARIDMTE3GIMNIIgYKL-YhgMws5yGAzhPQAFYAWoEU0FWUnIIT0xYNEQxQlYSCggBEAEYASoCRUkYASIECAEQASgCKAMoBDAN) ![Swiss International Air Lines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LX.gif) Sun, Oct 26 - Tue, Nov 4 IAD Washington LHR London CA $859 Roundtrip found 7 hours ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:IAD,to:LHR,departure:26/10/2025TANYT&leg2=from:LHR,to:IAD,departure:04/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:858.98&airProductToken=AQpqCjIIzLABEgI3MxiIGCC5PCj6tvsCMN-6-wI4TEAAWAFqCEVDT0xJR0hUcghMTFg0NkxHVAo0CMywARIDMzI0GLk8IOuJASiGvfsCMPS9-wI4TEABWAFqCEVDT0xJR0hUcghMTFg0NkxHVApqCjQIzLABEgMzMTcY64kBILk8KLyU_AIwr5X8AjhMQABYAWoIRUNPTElHSFRyCExMWDQ2TEdUCjIIzLABEgI3Mhi5PCCIGCj1lfwCMLSa_AI4TEABWAFqCEVDT0xJR0hUcghMTFg0NkxHVBIKCAEQARgBKgJMWBgBIgQIARABKAIoAygEMAs) ![Virgin Atlantic](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/VS.gif) Sun, Oct 26 - Tue, Nov 4 IAD Washington LHR London CA $888 Roundtrip found 7 hours ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:IAD,to:LHR,departure:26/10/2025TANYT&leg2=from:LHR,to:IAD,departure:04/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:887.08&airProductToken=AQoyCjAI1qYBEgIyMhiIGCDriQEo6Lf7AjCqu_sCOFRAAFgBagVMSUdIVHIIT0xYNDZTQkEKMgowCNamARICMjEY64kBIIgYKJKY_AIwmpz8AjhUQABYAWoFTElHSFRyCE9MWDQ2U0JBEgoIARABGAEqAlZTGAEiBAgBEAEoAigDKAQwAQ) ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Sun, Oct 26 - Tue, Nov 4 IAD Washington LHR London CA $888 Roundtrip found 7 hours ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:IAD,to:LHR,departure:26/10/2025TANYT&leg2=from:LHR,to:IAD,departure:04/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:887.08&airProductToken=AQpoCjIIwYIBEgQ1NDQ3GIgYIOKaASiVtfsCMIy2-wI4QkAAWAFqBUJBU0lDcghPTFg0RjFCVgoyCMGCARIDNzMyGOKaASDriQEo9bb7AjDLuvsCOEJAAVgBagVCQVNJQ3IIT0xYNEYxQlYKNAoyCMGCARIENjk2OBjriQEgiBgo-pX8AjDzmfwCOE9AAFgBagVCQVNJQ3IIT0xYNEYxQlYSCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAL) ## Find the cheapest month to fly from Washington (IAD) to London (LON) ### March is typically the cheapest month to fly From CA $531 - CA $1,129 per traveller. ## 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:23/10/2025TANYT&leg2=from:LHR,to:IAD,departure:12/11/2025TANYT&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 $958](https://www.expedia.ca/Flights-Search?leg1=from:IAD,to:LHR,departure:23/10/2025TANYT&leg2=from:LHR,to:IAD,departure:12/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) ## Frequently asked questions ### How much is a flight from IAD to London (LON-All Airports)? > If you're traveling from Washington Dulles Intl. Airport (IAD) to London (LON-All Airports), round-trip journeys start from CA $627. This figure is based on fares listed within the last 7 days on Expedia for flights departing within the next year, so don't let a good deal slip through your fingers. Book today and save yourself money and time. Prices and availability are subject to change. Additional terms apply. ### Do I need to pay a cancellation fee if I cancel my flight from IAD to London (LON-All Airports)? > This varies between airlines, as each has its own terms and conditions. Head to the [Customer Service Portal](https://www.expedia.ca/service/?langid=1033), where there are easy-to-follow instructions on how to cancel your flight online. ### How do I find cheap flights from Dulles Intl. Airport to London (LON-All Airports) that have flexible change policies? > Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Dulles Intl. Airport to London (LON-All Airports) flights, you'll see a "no change fees" filter for you to select. ### How far is the flight from IAD to London (LON-All Airports)? > The distance is around 5,900 kilometers, so fill your carry-on luggage with whatever you need to make your journey comfortable. Wondering what to take on board your Chantilly to England flight? A travel pillow, earplugs and a sleep mask are among the essentials. ### Which airlines fly direct from Washington Dulles Intl. Airport (IAD) to London (LON-All Airports)? > United Airlines (UA) is the number one choice for many travelers. It offers 60 flights from Dulles Intl. Airport to London (LON-All Airports) each month. If you want more options, check out the fares from British Airways (BA). This airlines operates 60 monthly flights between these airports. ### Are Dulles Intl. Airport to London (LON-All Airports) flight tickets cheaper when they're purchased at the last minute? > It is possible to pick up great last-minute deals from IAD to London (LON-All Airports), but it can also be hit-or-miss. As many airlines release seats up to a year in advance, it's worth keeping an eye on fares early and being ready to book when you spot a good bargain. Expedia compares carrier prices and updates flight deals regularly, so you can rest easy knowing you're always getting the latest offers. ## Travel information | Origin airport | Washington Dulles Intl. | | --- | --- | | Destination airport | Heathrow | | Roundtrip price | CA $627 | | 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 $627 rising to CA $888.   Here are more money-saving tips:  - Fly in February 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.