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>

£155 CHEAP FLIGHTS from Washington to London

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

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Cheap Flights from Washington to London

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

Round-trip

One-way

Last minute

Direct

Recent return flight deals from Washington to London

Mon, 13 Apr - Tue, 28 Apr

14:10 - 23:35

SEA

STN

25h 25m

2 stops

17:45 - 16:59

STN

SEA

31h 14m

2 stops

£454Multiple Airlines

Sat, 18 Apr - Sat, 25 Apr

19:00 - 00:05

SEA

STN

21h 05m

2 stops

05:55 - 20:40

STN

SEA

22h 45m

2 stops

£455Multiple Airlines

Mon, 13 Apr - Tue, 28 Apr

15:40 - 20:20

SEA

LHR

20h 40m

1 stop

13:05 - 20:40

LHR

SEA

15h 35m

1 stop

£456Icelandair

Sat, 12 Sep - Tue, 15 Sep

15:55 - 09:35

SEA

LHR

33h 40m

2 stops

06:40 - 13:45

LHR

SEA

15h 05m

2 stops

£457Scandinavian Airlines

Thu, 16 Apr - Sat, 25 Apr

19:00 - 20:20

SEA

LHR

17h 20m

1 stop

21:25 - 20:40

LHR

SEA

31h 15m

1 stop

£461Icelandair

Sun, 13 Sep - Fri, 25 Sep

15:55 - 16:00

SEA

LHR

16h 05m

1 stop

06:40 - 13:45

LHR

SEA

15h 05m

1 stop

£462Scandinavian Airlines

Mon, 20 Apr - Thu, 7 May

14:10 - 17:55

SEA

LCY

19h 45m

1 stop

09:15 - 22:40

LCY

SEA

21h 25m

2 stops

£571Lufthansa

Tue, 14 Apr - Tue, 21 Apr

17:35 - 17:20

SEA

LCY

15h 45m

1 stop

17:50 - 11:45

LCY

SEA

25h 55m

1 stop

£580Virgin Atlantic

Mon, 13 Apr - Mon, 20 Apr

14:10 - 17:55

SEA

LCY

19h 45m

1 stop

18:30 - 12:20

LCY

SEA

25h 50m

1 stop

£582Lufthansa

Mon, 6 Apr - Mon, 20 Apr

13:05 - 17:20

PDX

LCY

20h 15m

1 stop

17:50 - 11:10

LCY

PDX

25h 20m

1 stop

£587Virgin Atlantic

Useful Info

Low season	January
High season	August
Cheapest flight	£155

Best time to beat the crowds (3% less expensive on average)

Most popular time to fly and prices are also 17% lower on average.

Flight from Portland to London Stansted Airport

Verified travelerFlew with British Airways

SEA

LHR

Apr 2025

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

Verified travelerFlew with British Airways

SEA

LHR

Feb 2025

Don’t take a flight if you sick, or if you have no choice prepare to stay covered with mask throughout the flight

Verified travelerFlew with British Airways

SEA

LHR

Apr 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

Hounslow

Luton

Southend-on-Sea

Slough

Winchester

Croydon

Stansted

Folkestone

Chichester

Maidstone

Colchester

Chelmsford

Crawley

Richmond

Bedford

Hastings

Watford

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 £4,745

Business Class flights to Londonfrom £2,718

Premium Economy Class flights to Londonfrom £1,465

Economy class flights to Londonfrom £482

£155 Find Cheap Flights from Washington to London

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

Cheap Flights 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

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?

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.

Travelling to a place near London?

Everything you need to know for your flight to London

Cabin class types available on flights to Washington

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

Find direct flights for London

Flights to other popular destinations

Flights from domestic origins to London

Choose which airport to fly into in London

Find deals for your return flight