
Popular airlines from Washington Dulles International Airport (IAD) to Heathrow Airport (LHR)
- British Airways
British Airways
- Austrian Airlines
Austrian Airlines
- Virgin Atlantic
Virgin Atlantic
- Aer Lingus
Aer Lingus
- Brussels Airlines
Brussels Airlines
- Air France
Air France
- SAS
SAS
- Plan, book, fly with confidence
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Cheap Flights from Washington (IAD) to London (LHR)
Prices were available within the past 7 days and start at £172 for one-way flights and £352 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)
November is typically the cheapest month to fly
Graph displaying average flight prices per month
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 |
Return price | £351 |
Distance | 5866 km |
Average flight time | 12 hours 25 mins |
Compare flights from Washington to London easily and book with confidence
For travelling on business or for pleasure, Expedia makes it easy to book your flights from Washington to London. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Heathrow in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Washington Dulles Intl. to Heathrow.
To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights.
Grab a great deal on your flight from Washington Dulles Intl. (IAD) to Heathrow (LHR)
The easiest way to view the best deals on flights from Washington to London today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Washington Dulles Intl. to Heathrow start at just £352 and range up to £406.
To find an even better deal, try
- being flexible on your dates – midweek flights can be cheaper
- looking for other airports near Washington and London
- booking your flight during October, the cheapest month on this route
- varying your flight times – early morning and late at night are sometimes cheaper
Why you should book your Washington to London flight with Expedia!
We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Washington Dulles Intl. to Heathrow for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.
Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.
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Top Routes from Washington
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London
Washington
Baltimore
Nearby Airports
- Manassas Regional Airport (MNZ)
- Montgomery County Airpark Airport (GAI)
- Ronald Reagan Washington National Airport (DCA)
- College Park Airport (CGS)
- Tipton Airport (FME)
- Eastern West Virginia Regional Airport (MRB)
- Baltimore Washington Intl. Thurgood Marshall Airport (BWI)
- Hagerstown Regional Airport (HGR)
- Martin State Airport (MTN)
- Charlottesville-Albemarle Airport (CHO)