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Cheap Flights from London to Washington

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

London to Washington route information

Origin Airport Heathrow
Destination Airport Washington Dulles Intl.
Airlines Serving Aer Lingus, Air Canada, Air France, Alitalia, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Icelandair, KLM, Lufthansa, Royal Air Maroc, SAS, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic
Flight Price £268
Distance 5,866 km





Cheap LHR to IAD Flights

  • Question : How long is the flight from LHR to IAD?
    Answer : British Airways can get you there in eight hours and 25 minutes. So, if you were to leave London at 11:15 AM BST, you would arrive in Dulles at 2:40 PM EDT. Giving you enough time if you want to catch up on your sleep before you land. Don't forget the five hour time change. So, synchronize your watches.
  • Question : What is the cheapest airline flying from London to Dulles?
    Answer : United Airlines strives to keep prices down for their passengers over the next three months. Fares are being booked at just £327, which is quite a deal when compared to the more expensive bookings of £6,925.
  • Question : What is the cheapest date to fly to Dulles?
    Answer : As of Aug 19th, the best day for booking to Dulles (IAD) is Sep 10th. A ticket will put you out £353, which is 67% less than this route's average price.
  • Question : Do some days of the week have more flight times than others?
    Answer : Saturday has the greatest variety of flight times for London to Dulles with eight. With 1,762 different times, Friday provides the most options on average across all flights departing the United Kingdom.
  • Question : Which airline has the least delays from London to Dulles?
    Answer : Booking with British Airways means you will arrive to Dulles pretty close to the time your ticket states. In fact, this airline has a 68% average for getting there on time.
  • Question : Can I change the date of my flight?
    Answer : You sure can and you may save yourself some money by changing when you take off. The lowest-cost day to fly in September is Thursday. You might think you're missing out taking off a day early, but we think of it as you just adding saving for a future holiday.
  • Question : What airports do you fly into for Dulles?
    Answer : London Heathrow Airport is a terrific airport, but there is a cheaper way to get to Dulles— London City Airport. It's just 22 miles from London Heathrow Airport and flights are being booked 23% cheaper over the next few months.

Sterling Flights

When looking for plane tickets to Sterling, the ease and convenience of using Expedia simply can’t be beat. With tons of departure points and flights options from the top airline carriers, London gives you the widest array of cheap flights to Sterling. Look for Sterling airfare with the assurance that you have one of the world's leading full-service online travel brands working for you.

Expedia lets you search across the largest number of airlines and Sterling flights, which means that you’ll be able to find a great flight deal at the perfect travel date and time. Our simple-to-use booking engine makes looking for terrific bargains easy and hassle-free; just enter your travel dates and departure city, and let Expedia do the rest! Adjust your travel dates and explore connecting flights to find an even better deal on your Sterling flight!

Browse through dozens of options at great prices! Our friendly customer service representatives are here to serve you 24 hours day to provide assistance and answer any questions that you may have about booking your Sterling trip. There’s simply no substitute for great prices suited to your travel needs and backed by excellent customer support.

Combine your Sterling flight with a hotel and/or car rental for a package deal designed to save you even more money! Discover additional savings by booking in advance or find a last minute deal. There are tons of ways to save on your flights to Sterling from London. Use us as your stop travel destination and have the confidence that you’re getting a bargain!

May 2, 2019

Wonderful staff made this a great journey. Flight arrived an hour early too! Great start to the trip. Thanks Unitedairlines

Mar 27, 2019

Good flight and great landing

Mar 21, 2019

The staff were incredibly attentive

Mar 19, 2019

Thought the plane could do with a good clean esp in areas between seats and fuselage. Virgin App is brilliant as are the staff and service - Virgin never disappoints in these respects.

Feb 6, 2019

Loads of space and staff were excellent

Feb 3, 2019

Good team, though need to know policy on drink purchase

Jan 13, 2019

Really great on board service and best plane food I’ve ever had

Jan 3, 2019

Entertainment package was very old and inadequate compared to other airlines

Dec 28, 2018

Please upgrade your planes on my normal route LHR - EWR. The standard on this LHR - IAD flight was impressive and very different from the old planes on the EWR route. Thanks.

Dec 28, 2018

I really enjoyed the flight and it was so much better than expected. I will definitely be flying with United airlines again!

Package Disclaimer

*Savings amount equal to 100% when flight + hotel are booked together. Prices based on searches conducted by fellow shoppers within the past 24 hours. There is no guarantee that these prices will be in effect at the time of your search. Vacation package savings are based on comparison to prices on of the same components booked separately. Savings vary based on origin/destination, length of trip, stay dates and travel partners, and aren't available on all packages.