Cheap Flights London to Washington D.C. from £288

Flight FAQs

• Which airlines offer the cheapest flights from London to Washington D.C.?

  Based on Trip.com data, Icelandair offers Cheapest nonstop one-way flights from £288 (for example, LHR–IAD on Wed, Oct 21). For a Cheapest nonstop return flight, Icelandair offers fares from £321, departing on Sun, Dec 6 and returning on Sun, Dec 13.

• Which airlines offer direct flights from London to Washington D.C.?

  At the moment, you can catch a direct flight from London to Washington D.C. with the following airlines, including: Virgin Atlantic United Airlines British Airways Lufthansa American Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

• How long is a flight from London to Washington D.C.?

  A flight from London (LON) to Washington D.C. (WAS) takes an average of 8 hours 24 minutes.

• When is the best time to book flights from London to Washington D.C.?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from London to Washington D.C. is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How many flights are there from London to Washington D.C. each week?

  On average, 42 direct flights operate each week between London and Washington D.C.. See below the schedules of the main airlines serving this route:
  Austrian Airlines: S/M/T/W/T/F/S – OS7807 (departure at 17:10) Air Canada: S/M/T/W/T/F/S – AC5345 (departure at 12:27) Iberia: S/M/T/W/T/F/S – IB3590 (departure at 12:52)

• How can I find the best deals on flights from London to Washington D.C.?

  Here are some tips for finding the best flight deals from London to Washington D.C. on Trip.com:
  · Be flexible with your travel dates. The cheapest flight is currently on Wed, Oct 21, with one-way fares from just £288.
  · Compare airlines. American Airlines currently offers the lowest fares on this route.
  · Set up a price alert to track fare changes without searching every day.
  · Check Trip.com regularly for flight deals and available promo codes.
  · Avoid peak season or book early. January is generally the busiest month for travel to Washington D.C..
  · Get exclusive promo codes on the Trip.com app.

• When is the best time to book a flight from London to Washington D.C. to get the best price?

  The cheapest month to book a flight from London to Washington D.C. is usually August, when demand is lower.

• Which upcoming date is the cheapest for flights from London to Washington D.C.?

  After crunching the numbers on our October flight calendar, it's currently cheapest to fly from London to Washington D.C. on October 22, 2026 with Icelandair, with prices starting at £304.

• Which airports should you choose for flights from London to Washington D.C.?

  Flights to Washington D.C. can arrive at: Ronald Reagan Washington National Airport (DCA) and Dulles International Airport (IAD). The most common route connects Heathrow Airport and Dulles International Airport (LHR–IAD).

• What is the time difference between London and Washington D.C.?

  The time difference between Washington D.C. and London is 5h.

• How can I change or cancel my flight ticket from London to Washington D.C.?

  Tickets can only be changed or cancelled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

• What is the average price of a one-way flight from London to Washington D.C.?

  Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from London to Washington D.C. is £717. Fares vary by travel date, airline and availability.

• What is the average price of a return flight from London to Washington D.C.?

  Based on Trip.com data for flights departing in the next 30 days, the average return fare from London to Washington D.C. is £762. Fares vary by travel date, airline and availability.

• How do I book flights from London to Washington D.C. on Trip.com?

  Enter London and Washington D.C., choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveller details and complete payment to receive your confirmation.

• Are there budget airlines on the London to Washington D.C. route?

  Jetblue Airwaysare the most popular budget airlines flying from London to Washington D.C.. Check baggage, seat and payment fees before comparing the final price.