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Cheap flights from Washington to London from £182

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to London departing on 9/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap return flights

Enter your travel dates to find the best prices.
Icelandair Logo
15:40 - 14:40
SEA
-
LGW
15h 00m
1 stop
Icelandair Logo
15:40 - 20:40
LGW
-
SEA
13h 00m
1 stop
£394Icelandair
Sun, 3 May - Wed, 13 May
Icelandair Logo
15:40 - 14:40
SEA
-
LGW
15h 00m
1 stop
Icelandair Logo
15:40 - 20:40
LGW
-
SEA
13h 00m
1 stop
£395Icelandair
Mon, 13 Apr - Fri, 24 Apr
Multiple Airlines Logo
15:40 - 21:15
SEA
-
LTN
21h 35m
2 stops
Multiple Airlines Logo
06:15 - 17:55
LTN
-
SEA
19h 40m
2 stops
£402Multiple Airlines
Wed, 1 Apr - Wed, 8 Apr
Multiple Airlines Logo
16:10 - 22:40
SEA
-
STN
23h 30m
2 stops
Multiple Airlines Logo
18:05 - 14:20
STN
-
SEA
27h 15m
2 stops
£403Multiple Airlines
Wed, 11 Mar - Tue, 17 Mar
Lufthansa Logo
09:50 - 11:50
PDX
-
LHR
18h 00m
1 stop
Lufthansa Logo
08:45 - 00:35
LHR
-
PDX
22h 50m
2 stops
£437Lufthansa
Mon, 2 Mar - Wed, 18 Mar
Lufthansa Logo
15:15 - 13:20
PDX
-
LHR
14h 05m
1 stop
Lufthansa Logo
06:30 - 19:05
LHR
-
PDX
20h 35m
2 stops
£448Lufthansa
Tue, 28 Apr - Fri, 8 May
United Airlines Logo
07:02 - 12:00
GEG
-
LHR
21h 58m
1 stop
United Airlines Logo
07:40 - 21:03
LHR
-
GEG
20h 23m
2 stops
£461United Airlines
Wed, 11 Mar - Mon, 23 Mar
United Airlines Logo
05:00 - 09:40
GEG
-
LHR
20h 40m
1 stop
United Airlines Logo
06:35 - 21:18
LHR
-
GEG
21h 43m
2 stops
£461United Airlines
Fri, 27 Feb - Wed, 18 Mar
Delta Logo
09:25 - 10:30
GEG
-
LHR
17h 05m
1 stop
Delta Logo
08:40 - 21:29
LHR
-
GEG
19h 49m
2 stops
£462Delta
Wed, 4 Mar - Wed, 11 Mar
Delta Logo
13:45 - 09:30
SEA
-
LCY
11h 45m
1 stop
Delta Logo
10:00 - 11:45
LCY
-
SEA
33h 45m
1 stop
£488Delta
Mon, 13 Apr - Tue, 28 Apr

Lufthansa flights from State of Washington to London

Our best Lufthansa deals on State of Washington to London flight tickets
Lufthansa
27 Feb
SEA09:55Seattle/Tacoma Intl
16h 15m
2 stops
LHR10:10London Heathrow
6 Mar
LHR07:40London Heathrow
13h 40m
1 stop
SEA13:20Seattle/Tacoma Intl
£430
Lufthansa
28 Feb
SEA15:40Seattle/Tacoma Intl
12h 10m
1 stop
LHR11:50London Heathrow
7 Mar
LHR06:30London Heathrow
13h 40m
1 stop
SEA12:10Seattle/Tacoma Intl
£435
Lufthansa
2 Mar
PDX09:50Portland
18h 00m
1 stop
LHR11:50London Heathrow
18 Mar
LHR08:45London Heathrow
22h 50m
2 stops
PDX00:35Portland
£437

Virgin Atlantic flights from State of Washington to London

Our best Virgin Atlantic deals on State of Washington to London flight tickets
Virgin Atlantic
25 Apr
GEG14:08Spokane
22h 02m
2 stops
LHR20:10London Heathrow
7 May
LHR11:45London Heathrow
19h 03m
2 stops
GEG22:48Spokane
£477
Virgin Atlantic
26 Feb
SEA15:05Seattle/Tacoma Intl
17h 30m
1 stop
LCY16:35London City
6 Mar
LCY18:55London City
24h 40m
1 stop
SEA11:35Seattle/Tacoma Intl
£478
Virgin Atlantic
26 Feb
SEA06:10Seattle/Tacoma Intl
18h 40m
2 stops
LCY08:50London City
6 Mar
LCY18:55London City
24h 40m
1 stop
SEA11:35Seattle/Tacoma Intl
£481

momondo Fare Finder

 
Customise your flight search to find flights from State of Washington to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 31 January 2026.
Use the filters below to find and compare flights from Washington to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 3/5

15:40-14:40

1 stop15h 00m

London Gatwick

Wed 13/5

15:40-20:40

1 stop13h 00m

£394

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 13/4

15:40-14:40

1 stop15h 00m

London Gatwick

Fri 24/4

15:40-20:40

1 stop13h 00m

£395

SeattleLondon

SEA - LTN

SEALTN

Seattle/Tacoma Intl

Wed 1/4

15:40-21:15

2 stops21h 35m

London Luton

Wed 8/4

06:15-17:55

2 stops19h 40m

£402

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Wed 11/3

16:10-22:40

2 stops23h 30m

London Stansted

Tue 17/3

18:05-14:20

2 stops27h 15m

£403

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 2/3

09:50-11:50

1 stop18h 00m

London Heathrow

Wed 18/3

08:45-00:35

2 stops22h 50m

£437

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 28/4

15:15-13:20

1 stop14h 05m

London Heathrow

Fri 8/5

06:30-19:05

2 stops20h 35m

£448

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 11/3

07:02-12:00

1 stop21h 58m

London Heathrow

Mon 23/3

07:40-21:03

2 stops20h 23m

£461

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Fri 27/2

05:00-09:40

1 stop20h 40m

London Heathrow

Wed 18/3

06:35-21:18

2 stops21h 43m

£461

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 4/3

09:25-10:30

1 stop17h 05m

London Heathrow

Wed 11/3

08:40-21:29

2 stops19h 49m

£462

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 13/4

13:45-09:30

1 stop11h 45m

London City

Tue 28/4

10:00-11:45

1 stop33h 45m

£488

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from State of Washington to London

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to London?

The cheapest month to fly to London from State of Washington is in October. Flight prices, which tend to average around £471, are often lower during this time because this is during the off-season. The month of January is another great option to travel to London, with average flight prices from State of Washington averaging around £473.

What is the cheapest day to depart on your flight to London?

Our data shows that Tuesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £500. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from State of Washington to London for around £639.

What is the cheapest time of day to depart on your flight to London?

The cheapest time of day to fly to London is at midday when flights can be purchased for as low as £507. Flights in the afternoon are often more expensive, with an average ticket price of £591.

What is the cheapest Washington to London flight route?

Fly from Seattle/Tacoma Intl to London Heathrow for the best Washington - London flight prices

How far in advance should I book a flight to London?

You are more likely to see cheaper flights to London from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £571 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from State of Washington for as low as £490 on momondo.

What cabin class options are available on Washington to London flights?

There are 3 cabin classes available to choose from on Washington to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on State of Washington to London flights?

You could potentially save up to 12% on your flight if you consider stops on a State of Washington to London flight.

Cheap State of Washington to London flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to London

Best price found

£338

Fastest flight time

9h 15m

Direct flights

Every day

Airports in London

6 airports
The best one-way flight to London from State of Washington in the past 72 hours is £338. The best return flight deal from State of Washington to London found on momondo in the last 72 hours is £507.
The fastest flight from State of Washington to London takes 9h 15m
Direct flights go from State of Washington to London every day.
There are 6 airports in London. From State of Washington there are direct flights to London Heathrow (LHR).
Search flight deals

  • When did momondo last update prices for flights from Washington to London?

    Prices for flights from Washington to London were last updated today.

  • How many operators does momondo search for flights from Washington to London?

  • How old do you have to be to fly from Washington to London?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to London.

  • What documentation or ID do you need to fly to London?

    The travel and health documents you'll need for your trip to London may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from State of Washington to London?

Best airlines flying from State of Washington to London

Compare and see reviews for airlines that fly from State of Washington to London with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom £345Free CancellationRating
6.7
7,706 reviews
Search British Airways flights
Virgin AtlanticPriceFrom £360Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Milton Keynes
Luton
Gatwick
Maidstone
Slough
Southend-on-Sea
Canterbury
Ipswich
Ilford
Guildford
Chelmsford
Hayes
Dover
Folkestone
Worthing
Colchester
Bedford
Ramsgate
Chichester

Why use momondo?

Why should I use momondo to find a flight deal from Washington to London?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington to London . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Washington to London with flexible booking policies on momondo?

All flight searches from Washington to London on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Washington to London?

Once you have performed a search for Washington to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Washington to London right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Washington to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.

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Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London
London City Airport
London Gatwick Airport
London Heathrow Airport
London Luton Airport
London Southend Airport
London Stansted Airport