Title: £390 Cheap Icelandair flights from London to Washington (LHR→IAD) - Expedia.co.uk ![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) # £390 Cheap Icelandair flights from London to Washington (LHR→IAD) [View £390 flight on Mon, 27 Apr 2026](https://expedia.co.uk/Flights-Search?trip=oneway&leg1=from:LHR,to:IAD,departure:27/04/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:389.05&airProductToken=AQplCjEIxpIBEgM0NTUY64kBIIopKKm_iwMw58CLAzhPQABYAWoFTElHSFRyCE9KMVFHQkxUCjAIxpIBEgM2NDUYiikgiBgo8siLAzD4y4sDOE9AAVgBagVMSUdIVHIIT0oxUUdCTFQSCggBEAEYASoCRkkYASIECAEQASgCKAMoBDAB) - ![](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 25% 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.co.uk/login) ## Icelandair flights from London to Washington (LHR→IAD) Prices were available within the past 7 days and start at £390 for one-way flights and £366 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Return ![Icelandair](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/fi.gif) Mon, 16 Mar - Mon, 20 Apr LHR London IAD Washington £366 Return found 3 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:IAD,departure:16/03/2026TANYT&leg2=from:IAD,to:LHR,departure:20/04/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:365.70&airProductToken=AQplCjEIxpIBEgM0NTUY64kBIIopKPPmhwMwu-iHAzhYQABYAWoFTElHSFRyCFhKMlZHQkxUCjAIxpIBEgM2NDUYiikgiBgosvCHAzDC84cDOFhAAVgBagVMSUdIVHIIWEoyVkdCTFQKZQowCMaSARIDNjQ0GIgYIIopKL7yigMwofWKAzhYQABYAWoFTElHSFRyCFhKMlZHQkxUCjEIxpIBEgM0NTAYiikg64kBKOz1igMwr_eKAzhYQAFYAWoFTElHSFRyCFhKMlZHQkxUEgoIARABGAEqAkZJGAEiBAgBEAEoAigDKAQwAQ) ![Icelandair](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/fi.gif) Wed, 11 Mar - Tue, 17 Mar LHR London IAD Washington £367 Return found 3 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:IAD,departure:11/03/2026TANYT&leg2=from:IAD,to:LHR,departure:17/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:366.55&airProductToken=AQplCjEIxpIBEgM0NTEY64kBIIopKN-qhwMwoqyHAzhYQABYAWoFTElHSFRyCFhKMlZHQkxUCjAIxpIBEgM2NDUYiikgiBgo8qyHAzCCsIcDOFhAAVgBagVMSUdIVHIIWEoyVkdCTFQKZQowCMaSARIDNjQ0GIgYIIopKIj0hwMw6_aHAzhYQABYAWoFTElHSFRyCFhKMlZHQkxUCjEIxpIBEgM0NTAYiikg64kBKKf3hwMw6viHAzhYQAFYAWoFTElHSFRyCFhKMlZHQkxUEgoIARABGAEqAkZJGAEiBAgBEAEoAigDKAQwAQ) ![Icelandair](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/fi.gif) Thu, 5 Mar - Fri, 1 May LHR London IAD Washington £371 Return found 2 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:IAD,departure:05/03/2026TANYT&leg2=from:IAD,to:LHR,departure:01/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:370.13&airProductToken=AQpDCiAIxpIBEgM0NTEY64kBIIopKJ_nhgMw4uiGAzhYQABYAQofCMaSARIDNjQ1GIopIIgYKLLphgMwwuyGAzhYQAFYAQpDCh8IxpIBEgM2NDQYiBggiikonu6LAzCB8YsDOFhAAFgBCiAIxpIBEgM0NTAYiikg64kBKMzxiwMwj_OLAzhYQAFYARIKCAEQARgBKgJGSRgBIgQIARABKAQwAQ) ![Icelandair](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/fi.gif) Thu, 12 Mar - Fri, 8 May LHR London IAD Washington £371 Return found 4 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:IAD,departure:12/03/2026TANYT&leg2=from:IAD,to:LHR,departure:08/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:370.54&airProductToken=AQplCjEIxpIBEgM0NTEY64kBIIopKP-1hwMwwreHAzhYQABYAWoFTElHSFRyCFhKMlZHQkxUCjAIxpIBEgM2NDUYiikgiBgokriHAzCiu4cDOFhAAVgBagVMSUdIVHIIWEoyVkdCTFQKZQowCMaSARIDNjQ0GIgYIIopKP68jAMw4b-MAzhYQABYAWoFTElHSFRyCFhKMlZHQkxUCjEIxpIBEgM0NTAYiikg64kBKKzAjAMw78GMAzhYQAFYAWoFTElHSFRyCFhKMlZHQkxUEgoIARABGAEqAkZJGAEiBAgBEAEoAigDKAQwAQ) ![Icelandair](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/fi.gif) Wed, 15 Apr - Wed, 13 May LHR London IAD Washington £373 Return found 2 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:IAD,departure:15/04/2026TANYT&leg2=from:IAD,to:LHR,departure:13/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:372.55&airProductToken=AQplCjEIxpIBEgM0NTUY64kBIIopKKm4igMw57mKAzhYQABYAWoFTElHSFRyCFhKMlZHQkxUCjAIxpIBEgM2NDUYiikgiBgo8sGKAzD4xIoDOFhAAVgBagVMSUdIVHIIWEoyVkdCTFQKZQowCMaSARIDNjQ4GIgYIIopKMj2jAMwpvmMAzhYQABYAWoFTElHSFRyCFhKMlZHQkxUCjEIxpIBEgM0NTQYiikg64kBKMr8jAMwiP6MAzhYQAFYAWoFTElHSFRyCFhKMlZHQkxUEgoIARABGAEqAkZJGAEiBAgBEAEoAigDKAQwAQ) ![Icelandair](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/fi.gif) Wed, 11 Mar - Wed, 22 Apr LHR London IAD Washington £374 Return found 3 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:IAD,departure:11/03/2026TANYT&leg2=from:IAD,to:LHR,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:373.88&airProductToken=AQplCjEIxpIBEgM0NTEY64kBIIopKN-qhwMwoqyHAzhYQABYAWoFTElHSFRyCFhKMlZHQkxUCjAIxpIBEgM2NDUYiikgiBgo8qyHAzCCsIcDOFhAAVgBagVMSUdIVHIIWEoyVkdCTFQKZQowCMaSARIDNjQ0GIgYIIopKP6IiwMw4YuLAzhYQABYAWoFTElHSFRyCFhKMlZHQkxUCjEIxpIBEgM0NTQYiikg64kBKKqQiwMw6JGLAzhYQAFYAWoFTElHSFRyCFhKMlZHQkxUEgoIARABGAEqAkZJGAEiBAgBEAEoAigDKAQwAQ) ![Icelandair](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/fi.gif) Wed, 18 Mar - Sun, 22 Mar LHR London IAD Washington £378 Return found 3 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:IAD,departure:18/03/2026TANYT&leg2=from:IAD,to:LHR,departure:22/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:377.55&airProductToken=AQplCjEIxpIBEgM0NTEY64kBIIopKL_5hwMwgvuHAzhYQABYAWoFTElHSFRyCFhKMlZHQkxUCjAIxpIBEgM2NDUYiikgiBgo0vuHAzDi_ocDOFhAAVgBagVMSUdIVHIIWEoyVkdCTFQKZQowCMaSARIDNjQ0GIgYIIopKKisiAMwi6-IAzhYQABYAWoFTElHSFRyCFhKMlZHQkxUCjEIxpIBEgM0NTQYiikg64kBKNSziAMwkrWIAzhYQAFYAWoFTElHSFRyCFhKMlZHQkxUEgoIARABGAEqAkZJGAEiBAgBEAEoAigDKAQwAQ) ![Icelandair](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/fi.gif) Mon, 9 Mar - Mon, 16 Mar LHR London IAD Washington £379 Return just found [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:IAD,departure:09/03/2026TANYT&leg2=from:IAD,to:LHR,departure:16/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:378.78&airProductToken=AQplCjEIxpIBEgM0NTUY64kBIIopKJOYhwMw25mHAzhYQABYAWoFTElHSFRyCFhKMlZHQkxUCjAIxpIBEgM2NDUYiikgiBgo0qGHAzDipIcDOFhAAVgBagVMSUdIVHIIWEoyVkdCTFQKZQowCMaSARIDNjQ0GIgYIIopKOjohwMwy-uHAzhYQABYAWoFTElHSFRyCFhKMlZHQkxUCjEIxpIBEgM0NTAYiikg64kBKIfshwMwyu2HAzhYQAFYAWoFTElHSFRyCFhKMlZHQkxUEgoIARABGAEqAkZJGAEiBAgBEAEoAigDKAQwAQ) ![Icelandair](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/fi.gif) Mon, 13 Apr - Sun, 10 May LHR London IAD Washington £380 Return found 2 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:IAD,departure:13/04/2026TANYT&leg2=from:IAD,to:LHR,departure:10/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:380.00&airProductToken=AQpDCiAIxpIBEgM0NTUY64kBIIopKOmhigMwp6OKAzhYQABYAQofCMaSARIDNjQ1GIopIIgYKLKrigMwuK6KAzhYQAFYAQpDCh8IxpIBEgM2NDQYiBggiikovtOMAzCh1owDOFhAAFgBCiAIxpIBEgM0NTAYiikg64kBKOzWjAMwr9iMAzhYQAFYARIKCAEQARgBKgJGSRgBIgQIARABKAQwAQ) ![Icelandair](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/fi.gif) Thu, 16 Apr - Sun, 10 May LHR London IAD Washington £383 Return found 2 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:IAD,departure:16/04/2026TANYT&leg2=from:IAD,to:LHR,departure:10/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:382.49&airProductToken=AQpDCiAIxpIBEgM0NTEY64kBIIopKNW_igMwk8GKAzhYQABYAQofCMaSARIDNjQ1GIopIIgYKPLBigMw-MSKAzhYQAFYAQpDCh8IxpIBEgM2NDQYiBggiikovtOMAzCh1owDOFhAAFgBCiAIxpIBEgM0NTAYiikg64kBKOzWjAMwr9iMAzhYQAFYARIKCAEQARgBKgJGSRgBIgQIARABKAQwAQ) ## Alternative airports near Washington Prices were available within the past 7 days. Prices and availability are subject to change. [](https://www.expedia.co.uk/Flights-Search?leg1=from:LHR,to:DCA,departure:14/03/2026TANYT&leg2=from:DCA,to:LHR,departure:20/03/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) DCA Ronald Reagan Washington National CheapestClosest 8 min [Flights from £504 ](https://www.expedia.co.uk/Flights-Search?leg1=from:LHR,to:DCA,departure:14/03/2026TANYT&leg2=from:DCA,to:LHR,departure:20/03/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) ## Find the cheapest month to fly from London (LHR) to Washington (IAD) ### February is typically the cheapest month to fly From £352 - £590 per traveller. ![](https://forever.travel-assets.com/flex/flexmanager/images/2026/02/06/expedia-sale-2026-desktop-uk-fr-de.jpg?impolicy=fcrop&w=1400&h=600&q=mediumHigh) ## The Annual Holiday Sale Members save up to 40% on hotels and holiday homes. Plan this year’s big trip and save. [Book now](https://expedia.co.uk/cheap-deals?rfrr=FTG_SPRING_PROMO_) ## Travel information | Origin airport | Heathrow | | ------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Destination airport | Washington Dulles Intl. | | Airlines serving | Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, ITA Airways, Iberia, Icelandair, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic | | Popular airline | British Airways | | Distance | 5866 km | | Average flight time | 3 hours 36 mins | ## Explore a world of travel with Expedia - Accommodation - Flights - Packages - Cars - Holiday Homes - Other - [4 Star Hotels in Sully ](https://www.expedia.co.uk/4Star-Sully-Hotels.s40-0-d553248635976006627.Travel-Guide-Filter-Hotels) - [5 Star Hotels in Reston ](https://www.expedia.co.uk/5Star-Reston-Hotels.s50-0-d10437.Travel-Guide-Filter-Hotels) - [5 Star Hotels in Sterling ](https://www.expedia.co.uk/5Star-Sterling-Hotels.s50-0-d9843.Travel-Guide-Filter-Hotels) - [Ashburn Hotels ](https://www.expedia.co.uk/Ashburn-Hotels.d6035055.Travel-Guide-Hotels) - [Brambleton Hotels ](https://www.expedia.co.uk/Brambleton-Hotels.d553248635974902857.Travel-Guide-Hotels) - [Cottages in Chantilly ](https://www.expedia.co.uk/Chantilly-Cottages.d8638-aaCottages.Travel-Guide-Accommodation) - [Hotels with Hot Tubs in Chantilly ](https://www.expedia.co.uk/Chantilly-Hotels-Hotels-With-Hot-Tubs.0-0-d8638-tHotelsWithHotTubs.Travel-Guide-Filter-Hotels) - [Wedding Hotels in Chantilly ](https://www.expedia.co.uk/Chantilly-Hotels-Wedding-Hotel.0-0-d8638-tWeddingHotel.Travel-Guide-Filter-Hotels) - [Chantilly Hotels ](https://www.expedia.co.uk/Chantilly-Hotels.d8638.Travel-Guide-Hotels) - [Hotels near Cookology Recreational Culinary School ](https://www.expedia.co.uk/Cookology-Recreational-Culinary-School-Hotels.0-l553248621532662019-0.Travel-Guide-Filter-Hotels) - [Gay-Friendly Hotels in Dulles ](https://www.expedia.co.uk/Dulles-Hotels-Gay-Friendly-Hotel.0-0-d553248635975867357-tGayFriendlyHotel.Travel-Guide-Filter-Hotels) - [Dulles Hotels ](https://www.expedia.co.uk/Dulles-Hotels.d553248635975867357.Travel-Guide-Hotels) - [Dulles Town Center Hotels ](https://www.expedia.co.uk/Dulles-Town-Center-Hotels.d553248634999423703.Travel-Guide-Hotels) - [Best Western Hotels in Herndon ](https://www.expedia.co.uk/Herndon-Hotels-Best-Western.0-0-d7596--bBestWestern.Travel-Guide-Filter-Hotels) - [Luxury Hotels in Herndon ](https://www.expedia.co.uk/Herndon-Hotels-Luxury-Hotel.0-0-d7596-tLuxuryHotel.Travel-Guide-Filter-Hotels) - [Romantic Hotels in Herndon ](https://www.expedia.co.uk/Herndon-Hotels-Romantic-Hotel.0-0-d7596-tRomanticHotel.Travel-Guide-Filter-Hotels) - [Herndon Hotels ](https://www.expedia.co.uk/Herndon-Hotels.d7596.Travel-Guide-Hotels) - [Oak Hill Hotels ](https://www.expedia.co.uk/Oak-Hill-Hotels.d553248635975849526.Travel-Guide-Hotels) - [Hotels near One Loudoun ](https://www.expedia.co.uk/One-Loudoun-Hotels.0-l553248633992325122-0.Travel-Guide-Filter-Hotels) - [Potomac Falls Hotels ](https://www.expedia.co.uk/Potomac-Falls-Hotels.d553248635975848832.Travel-Guide-Hotels) - [Hotels with Connecting Rooms in Reston ](https://www.expedia.co.uk/Reston-Hotels-Hotel-With-Connecting-Rooms.0-0-d10437-thotelwithconnectingrooms.Travel-Guide-Filter-Hotels) - [Reston Hotels ](https://www.expedia.co.uk/Reston-Hotels.d10437.Travel-Guide-Hotels) - [Hotels near Reston Town Center ](https://www.expedia.co.uk/Reston-Town-Center-Hotels.0-l6127319-0.Travel-Guide-Filter-Hotels) - [South Riding Hotels ](https://www.expedia.co.uk/South-Riding-Hotels.d553248635975851220.Travel-Guide-Hotels) - [Cheap Hotels in Sterling ](https://www.expedia.co.uk/Sterling-Hotels-Budget-Hotels.0-0-d9843-tBudgetHotels.Travel-Guide-Filter-Hotels) - [Gay-Friendly Hotels in Sterling ](https://www.expedia.co.uk/Sterling-Hotels-Gay-Friendly-Hotel.0-0-d9843-tGayFriendlyHotel.Travel-Guide-Filter-Hotels) - [Luxury Hotels in Sterling ](https://www.expedia.co.uk/Sterling-Hotels-Luxury-Hotel.0-0-d9843-tLuxuryHotel.Travel-Guide-Filter-Hotels) - [Marriott Hotels & Resorts in Sterling ](https://www.expedia.co.uk/Sterling-Hotels-Marriott-Hotels-Resorts.0-0-d9843--bMarriottHotelsResorts.Travel-Guide-Filter-Hotels) - [Sterling Hotels ](https://www.expedia.co.uk/Sterling-Hotels.d9843.Travel-Guide-Hotels) - [Holiday Homes in Sterling ](https://www.expedia.co.uk/Sterling-Private-Holiday-Homes.d9843-aaPrivateHolidayHomes.Travel-Guide-Accommodation) - [Hotels near Steven F. 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