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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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 return ticket. You could then fly to London with an airline and back to Washington with another airline. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

£183 CHEAP FLIGHTS from Washington to London

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Flights Deals

Cheap Flight Deals from Washington to London

Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Washington to London that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Round-trip

One-way

Last minute

Direct

Recent return flight deals from Washington to London

KAYAK's recommended return flight deals from the most popular airlines that fly from Washington to London.

Discover the best prices for you by selecting your travel dates on KAYAK.

16:00 - 21:40SEA-LHR

21h 40m1 stop

06:40 - 13:50LHR-SEA

15h 10m1 stop

£326Scandinavian Airlines

Find Deal

lun., 25 ago. - lun., 8 sep.

16:00 - 21:40SEA-LHR

21h 40m1 stop

06:40 - 13:50LHR-SEA

15h 10m1 stop

£348Scandinavian Airlines

Find Deal

lun., 25 ago. - lun., 8 sep.

19:00 - 14:40SEA-LGW

11h 40m1 stop

15:40 - 20:40LGW-SEA

13h 00m1 stop

£439Icelandair

Find Deal

sáb., 4 oct. - dom., 12 oct.

15:20 - 20:20PDX-LHR

21h 00m1 stop

12:15 - 18:00LHR-PDX

12h 45m1 stop

£442Icelandair

Find Deal

mié., 8 oct. - mié., 29 oct.

11:34 - 10:00SEA-LGW

14h 26m1 stop

12:00 - 22:53LGW-SEA

18h 53m1 stop

£444Delta

Find Deal

dom., 27 jul. - jue., 28 ago.

19:25 - 13:00PDX-LHR

9h 35mdirect

14:20 - 17:35LHR-PDX

10h 15mdirect

£446Iberia

Find Deal

mié., 22 oct. - vie., 31 oct.

13:30 - 06:50SEA-LHR

9h 20mdirect

16:30 - 18:20LHR-SEA

9h 50mdirect

£446Iberia

Find Deal

mar., 19 ago. - mié., 3 sep.

20:25 - 14:15SEA-LHR

9h 50mdirect

06:15 - 11:15LHR-SEA

13h 00m1 stop

£459Delta

Find Deal

dom., 17 ago. - jue., 28 ago.

19:35 - 21:15SEA-STN

17h 40m1 stop

12:15 - 17:50STN-SEA

13h 35m1 stop

£460

Find Deal

dom., 17 ago. - mar., 26 ago.

16:00 - 22:30SEA-STN

22h 30m2 stops

14:45 - 13:50STN-SEA

31h 05m2 stops

£479

Find Deal

mié., 27 ago. - mar., 2 sep.

Useful Info

Low season	January
High season	July
Cheapest flight	£183

Best time to beat the crowds (5% less expensive on average)

Most popular time to fly (22% more expensive on average)

Flight from Portland to London Gatwick Airport

Verified travelerFlew with British AirwaysSEA-LHRApr 2025

Make sure you have plenty of time between flights if you are delayed.

GaryFlew with British AirwaysSEA-LHRAug 2024

I have always used British Airways for trips to London and have been happy with their service.

Verified travelerFlew with British AirwaysSEA-LHRApr 2024

Bring a sack lunch -- airport food was very expensive.

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 return 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.

Gatwick

Milton Keynes

Eastbourne

Luton

Southend-on-Sea

Winchester

Croydon

Slough

Stansted

Chichester

Maidstone

Folkestone

Colchester

Crawley

Chelmsford

Hastings

Bedford

Watford

Basingstoke

Newbury

Everything you need to know for your flight to London

Cabin class

Complete your trip

Direct flights

Flights to other cities

Origins

Other airports

Return flight deals

Cabin class types available on flights to Washington

First Class flights to Londonfrom £4,718

Business Class flights to Londonfrom £3,952

Prem Econ Class flights to Londonfrom £1,724

Economy class flights to Londonfrom £337

£183 Find Cheap Flights from Washington to London

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to London departing on 19/7. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.

KAYAK searches hundreds of travel sites at once for deals on flights to London

Cheap Flight Deals from Washington to London

Recent return flight deals from Washington to London

Recent one-way flight deals from Washington to London

Recent last minute flight deals from Washington to London

Recent direct flight deals from Washington to London

Good to know - Cheap tickets from Washington to London

Low season

High season

Cheapest flight

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

FAQs for booking flights from Washington to London

How does KAYAK find such low prices 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?

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

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

Travelling to a place near London?

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.

Complete your trip to London with a hotel stay or car hire

Find direct flights for London

Flights to other popular destinations

The most popular flights on KAYAK according to clicks in the last 2 weeks. Prices are the lowest found on KAYAK over the last 7 days. Price and availability are not guaranteed.

Flights from domestic origins to London

Flights from all regions of Washington to London. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

Choose which airport to fly into in London

Find deals for your return flight