$245 Find Cheap Flights from Washington to London

1 adult
1 adult, Economy

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Useful Info

Good to know

Low seasonJanuary
Cheapest flight$245
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly and prices are also 20% lower on average.
Flight from Seattle to London Gatwick Airport

Flights from Washington to London: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Washington to London 
Learn how KAYAK collects reviews and tips from users.
Verified travelerFlew with British AirwaysSEA-LHRApr 2025
Make sure you have plenty of time between flights if you are delayed.
Verified travelerFlew with British AirwaysSEA-LHRApr 2024
Bring a sack lunch -- airport food was very expensive.

FAQs for booking flights from Washington to London

  • How does KAYAK find such low prices on flights from Washington to London?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to London.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to London?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Washington is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington to London?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London with an airline and back to Washington with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to London?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Wembley
Slough
Hayes
Richmond
Luton
Ilford
Crawley
Guildford
Watford
Eastbourne
Kingston upon Thames
Deal
Harrow
Hastings
Southall
St. Albans
Ipswich
Bedford
Folkestone

Everything you need to know for your flight to London

Cabin class types available on flights to Washington

Cabin classes available on flights to London. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
First Class flights to Londonfrom $5,751
Business Class flights to Londonfrom $2,353
Prem Econ Class flights to Londonfrom $1,431
Economy Class flights to Londonfrom $508

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