Cheap Flights Washington D.C. to London from £176

Flight FAQs

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

  Based on Trip.com data, Frontier Airlines offers Cheapest nonstop one-way flights from £176 (for example, IAD–LGW on Mon, Oct 5). For a Cheapest nonstop return flight, Scandinavian Airlines offers fares from £389, departing on Sat, Sep 12 and returning on Wed, Sep 16.

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

  At the moment, you can catch a direct flight from Washington D.C. to London with the following airlines, including: British Airways Virgin Atlantic United Airlines Lufthansa Delta Air Lines 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 Washington D.C. to London?

  A flight from Washington D.C. (WAS) to London (LON) takes an average of 7 hours 29 minutes.

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

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Washington D.C. to London 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 Washington D.C. to London each week?

  On average, 24 direct flights operate each week between Washington D.C. and London. See below the schedules of the main airlines serving this route:
  Delta Air Lines: S/M/T/W/T/F/S – DL5982 (departure at 01:36)

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

  Here are some tips for finding the best flight deals from Washington D.C. to London on Trip.com:
  · Be flexible with your travel dates. The cheapest flight is currently on Mon, Oct 5, with one-way fares from just £176.
  · Compare airlines. United 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. July is generally the busiest month for travel to London.
  · Get exclusive promo codes on the Trip.com app.

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

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

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

  After crunching the numbers on our September flight calendar, it's currently cheapest to fly from Washington D.C. to London on September 28, 2026 with Frontier Airlines, with prices starting at £185.

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

  Flights to London can arrive at: London City Airport (LCY)London Gatwick Airport (LGW)Heathrow Airport (LHR)London Luton Airport (LTN)London Southend Airport (SEN)London Stansted Airport (STN). The most common route connects Dulles International Airport and Heathrow Airport (IAD–LHR).

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

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

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

  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 Washington D.C. to London?

  Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Washington D.C. to London is £390. Fares vary by travel date, airline and availability.

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

  Based on Trip.com data for flights departing in the next 30 days, the average return fare from Washington D.C. to London is £836. Fares vary by travel date, airline and availability.

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

  Enter Washington D.C. and London, 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 Washington D.C. to London route?

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