Washington to London flights
The cheapest round trip we found from Washington to London is $688 (Jan 8 – 15, 2027, 2 stops), 3% below the usual $709.
WAS to LON · Round trip · Economy · Prices per person in USD · Price found (3 hours ago)
Cheapest found
Cheapest round trip by month
Lowest fare found per departure month| Month | Cheapest round trip |
|---|---|
| November 2026 | $751 |
| December 2026 | $730 |
| January 2027 | $688 |
| February 2027 | No fares found yet |
| March 2027 | No fares found yet |
| April 2027 | No fares found yet |
| May 2027 | No fares found yet |
| June 2027 | No fares found yet |
| July 2027 | No fares found yet |
| August 2027 | $452 (cheapest month) |
| September 2027 | No fares found yet |
| October 2027 | $748 |
Cheapest dates in the next 4 months
Round trip, per person-
Jan 8 – 15, 2027 7 nights · leave Fri$688$688 Book
jetBlue 2 stops · 8h 24m -
Dec 6 – 11 5 nights · leave Sun$838 +18% vs usual$838 +18% vs usual Book
jetBlue 1 stop · 8h 22m
Prices change often. The booking site shows the final price before you pay. Other dates? Set an alert
Things to do in London
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Airport transfer to London
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Plan the rest of your trip
London · Jan 8 – 15, 2027- eSIM for United Kingdom Yesim · prepaid mobile data (opens Yesim in a new tab)
- Car rental in United Kingdom Economybookings · compare rental companies (opens Economybookings in a new tab)
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Good to know
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All flights to London
Washington to London: questions
How much does a flight from Washington to London cost?
The cheapest round trip we have found right now is $688, leaving January 8 and returning January 15. The usual price on this route is about $709, so this fare is 3% less. Prices are per person, economy, in USD.
What is the cheapest month to fly from Washington to London?
August 2027, with round trips from $452. The most expensive month in our data is November (from $751). Based on the 5 months ahead we have prices for.
Which airports do Washington to London flights use?
Washington airports include Washington Dulles International (IAD) and Ronald Reagan National (DCA). London airports include London Heathrow (LHR), London City (LCY) and London Gatwick (LGW). The prices on this page cover every airport in both cities (WAS and LON are the city codes).
About this route
We track round-trip economy fares from Washington (United States) to London (United Kingdom) using Travelpayouts / Aviasales data. The cheapest round trip we've found is $688, departing January 8 and returning January 15, about 3% below the usual $709. The cheapest month to fly in our data is August, from $452. Prices are per person and were correct when found; the final price is set by the airline or booking site when you book.