Popular airlines from Washington Dulles Intl. Airport (IAD) to Heathrow Airport (LHR)
British AirwaysBritish Airways
TAP PortugalTAP Portugal
Aer LingusAer Lingus
LufthansaLufthansa
Austrian AirlinesAustrian Airlines
IberiaIberia
Virgin AtlanticVirgin Atlantic
Today's featured flight deals from Washington Dulles Intl. Airport (IAD) to Heathrow Airport (LHR)
- Washington (IAD) to London (LHR).United, nonstop.Departing on Sun, Sep 14 at 6:40pm from Washington, arriving on Mon, Sep 15 at 6:55am in London.Returning on Sun, Sep 21 at 8:45am from London, arriving at 4:15pm in Washington.Select United flight departing on Sun, Sep 14 at 6:40pm from Washington, returning on Sun, Sep 21 at 8:45am from London priced at $66830% less than typical$668
- Washington (IAD) to London (LHR).United, nonstop.Departing on Sun, Sep 14 at 10:25pm from Washington, arriving on Mon, Sep 15 at 10:40am in London.Returning on Sun, Sep 21 at 8:45am from London, arriving at 4:15pm in Washington.Select United flight departing on Sun, Sep 14 at 10:25pm from Washington, returning on Sun, Sep 21 at 8:45am from London priced at $66830% less than typical$668
- Washington (IAD) to London (LHR).United, nonstop.Departing on Wed, Sep 3 at 6:40pm from Washington, arriving on Thu, Sep 4 at 6:55am in London.Returning on Wed, Sep 10 at 8:30am from London, arriving at 3:15pm in Washington.Select United flight departing on Wed, Sep 3 at 6:40pm from Washington, returning on Wed, Sep 10 at 8:30am from London priced at $74920% less than typical$749
- Washington (IAD) to London (LHR).United, nonstop.Departing on Wed, Sep 3 at 6:40pm from Washington, arriving on Thu, Sep 4 at 6:55am in London.Returning on Wed, Sep 10 at 9:30am from London, arriving at 3:50pm in Washington.Select United flight departing on Wed, Sep 3 at 6:40pm from Washington, returning on Wed, Sep 10 at 9:30am from London priced at $74920% less than typical$749
- Washington (IAD) to London (LHR).British Airways, nonstop.Departing on Mon, Sep 15 at 7:25pm from Washington, arriving on Tue, Sep 16 at 7:45am in London.Returning on Fri, Sep 26 at 2:25pm from London, arriving at 5:30pm in Washington.Select British Airways flight departing on Mon, Sep 15 at 7:25pm from Washington, returning on Fri, Sep 26 at 2:25pm from London priced at $67925% less than typical$679
- Washington (IAD) to London (LHR).Virgin Atlantic, nonstop.Departing on Wed, Sep 3 at 5:50pm from Washington, arriving on Thu, Sep 4 at 6:20am in London.Returning on Wed, Sep 10 at 12:35pm from London, arriving at 4:00pm in Washington.Select Virgin Atlantic flight departing on Wed, Sep 3 at 5:50pm from Washington, returning on Wed, Sep 10 at 12:35pm from London priced at $76120% less than typical$761
- Washington (IAD) to London (LHR).Virgin Atlantic, nonstop.Departing on Wed, Sep 24 at 5:50pm from Washington, arriving on Thu, Sep 25 at 6:20am in London.Returning on Mon, Sep 29 at 7:45pm from London, arriving on Tue, Sep 30 at 4:20pm in Washington.Select Virgin Atlantic flight departing on Wed, Sep 24 at 5:50pm from Washington, returning on Mon, Sep 29 at 7:45pm from London priced at $64225% less than typical$642
- Washington (IAD) to London (LHR).British Airways, nonstop.Departing on Fri, Sep 19 at 10:40pm from Washington, arriving on Sat, Sep 20 at 11:05am in London.Returning on Tue, Sep 23 at 12:45pm from London, arriving at 4:00pm in Washington.Select British Airways flight departing on Fri, Sep 19 at 10:40pm from Washington, returning on Tue, Sep 23 at 12:45pm from London priced at $68720% less than typical$687
Cheap Flights from Washington to London (IAD-LHR)
Prices were available within the past 7 days and start at $231 for one-way flights and $451 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.
Find the cheapest month to fly from Washington (IAD) to London (LHR)
October is typically the cheapest month to fly
Graph displaying average flight prices per month
Alternative airports near London
Prices were available within the past 7 days. Prices and availability are subject to change.
Origin airport | Washington Dulles Intl. |
Destination airport | Heathrow |
Airlines serving | Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, KLM, Lufthansa, Royal Air Maroc, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic |
Roundtrip price | $450 |
Distance | 3666 mi |
Average flight time | 12 hours 21 mins |
Washington to London Flights
The cheapest times to fly from Washington to London
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 London are during the month of September. You can find some of the cheapest flights from Washington to London with Expedia's search tool and vast selection of airlines.
The best time to book a flight from Washington to London
Sunday is one of the best days to book for cheap flights from Washington to London: 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 London
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 London in 2025. You can also book with separate airlines for your outbound and return journeys, from $231 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 London 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. Bundling together your Washington to London 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.
Frequently asked questions
Explore a world of travel with Expedia
Lodging
- Hotels near Heathrow Terminals 2 & 3 Underground Station
- Aparthotels in Heathrow Terminals 2 & 3 Underground Station
- Hotels near Heathrow Terminals 2 & 3 Station
- Hotels near Heathrow Villages
- Hotels near Heathrow Terminal 4 Station
- Hotels near Heathrow Terminal 4 Underground Station
- Houseboats in Heathrow Terminal 4 Station
- Hotels near Longford
- Gay friendly Hotels in Longford
- Hotels near Hatton Cross Underground Station
- Apartments in Hatton Cross Underground Station
- Hotels near Harlington
- Cheap Hotels in Harlington
- Pet-friendly Hotels in Harlington
- Family Hotels in Harlington
- Historic Hotels in Harlington
- Hotels with Restaurants in Harlington
- Resorts & Hotels with Spas in Harlington
- Golf Hotels in Harlington
- Hotels near Stanwell
- Family Hotels in Stanwell
- Hotels near Heathrow Terminal 5 Station
- Hotels near Harmondsworth
- Hotels near Hatton
- Apartments in Heathrow Terminal 5 Station
- Cottages in Heathrow Terminal 5 Station
- Hostels in Heathrow Terminal 5 Station
- Luxury Hotels in Cranford
- Hotels near Cranford
- 3 Star Hotels in Cranford
- West Drayton Hotels
- Houseboats in West Drayton
- B&B in West Drayton
- Hostels in West Drayton
- Vacation Homes in West Drayton
- Cheap Hotels in West Drayton
- Pet-friendly Hotels in West Drayton
- Hotels with Hot Tubs in West Drayton
- Family Hotels in West Drayton
- Hotel Wedding Venues Hotels in West Drayton
- Cabin Rentals in West Drayton
- Resorts & Hotels with Spas in West Drayton
- Hotel with a Concierge Hotels in West Drayton
- Hotels with an Outdoor Pool in West Drayton
- Hotels with Connecting Rooms in West Drayton
- Hotels with Laundry Facilities in West Drayton
- Hotels near Feltham West
- Hotels near Feltham Station
- Feltham Hotels
- Hostels in Feltham
- Cheap Hotels in Feltham
- Hotel Wedding Venues Hotels in Feltham
- Aparthotels in Feltham
- Apartments in Feltham
- Hotels with Air Conditioning in Feltham
- Luxury Hotels in Feltham
- Villas in Feltham
- Houseboats in Feltham
- Ashford Hotels
- Aparthotels in Ashford
- Travelodge UK Hotels in Ashford
- Hotels near Heston West
- Gay friendly Hotels in Heston West
- Hotels near Stockley Park
- Hotels near Hounslow West Underground Station
- B&B in Hounslow West Underground Station
- Hotels near Colnbrook
- Historic Hotels in Colnbrook
- Waterpark Hotels in Colnbrook
- Luxury Hotels in Colnbrook