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Cheap flights from Washington to the United Kingdom from £163

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 the United Kingdom departing on 19/10. 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

SWISS Logo
15:37 - 17:50SEA-LHR
18h 13m2 stops
SWISS Logo
09:00 - 23:15LHR-SEA
22h 15m2 stops
£284SWISS
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Mon, 3 Nov - Sun, 16 Nov
Logo
20:05 - 17:50SEA-STN
13h 45m1 stop
Logo
06:30 - 18:20STN-SEA
19h 50m1 stop
£343
Find Deal
Wed, 12 Nov - Wed, 19 Nov
United Airlines Logo
05:05 - 09:40SEA-LHR
20h 35m1 stop
United Airlines Logo
06:35 - 13:20LHR-SEA
14h 45m1 stop
£349United Airlines
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Tue, 4 Nov - Wed, 19 Nov
Aer Lingus Logo
19:35 - 15:55SEA-LHR
12h 20m1 stop
Aer Lingus Logo
12:10 - 19:20LHR-SEA
14h 10m1 stop
£352Aer Lingus
Find Deal
Wed, 22 Oct - Fri, 31 Oct
Aer Lingus Logo
19:35 - 20:20SEA-LHR
16h 45m1 stop
Aer Lingus Logo
08:50 - 17:50LHR-SEA
17h 00m1 stop
£352Aer Lingus
Find Deal
Sun, 14 Sep - Thu, 18 Sep
Icelandair Logo
14:35 - 10:55SEA-LGW
12h 20m1 stop
Icelandair Logo
11:55 - 17:00LGW-SEA
13h 05m1 stop
£362Icelandair
Find Deal
Tue, 4 Nov - Wed, 19 Nov
Icelandair Logo
19:00 - 14:40SEA-LGW
11h 40m1 stop
Icelandair Logo
15:40 - 17:50LGW-SEA
34h 10m1 stop
£363Icelandair
Find Deal
Wed, 1 Oct - Wed, 8 Oct
Virgin Atlantic Logo
20:25 - 14:15SEA-LHR
9h 50mdirect
Virgin Atlantic Logo
17:25 - 19:50LHR-SEA
10h 25mdirect
£365Virgin Atlantic
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Wed, 3 Sep - Wed, 10 Sep
United Airlines Logo
07:20 - 06:30SEA-LHR
15h 10m1 stop
United Airlines Logo
09:00 - 16:59LHR-SEA
15h 59m1 stop
£372United Airlines
Find Deal
Tue, 19 Aug - Wed, 3 Sep
Virgin Atlantic Logo
20:25 - 14:15SEA-LHR
9h 50mdirect
Virgin Atlantic Logo
06:15 - 11:15LHR-SEA
13h 00m1 stop
£378Virgin Atlantic
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Mon, 18 Aug - Thu, 28 Aug

British Airways flights from State of Washington to United Kingdom

Our best British Airways deals on State of Washington to United Kingdom flight tickets
British Airways
1 Oct
SEA13:30Seattle/Tacoma Intl
9h 20m
LHR06:50London Heathrow
15 Oct
LHR16:30London Heathrow
9h 50m
SEA18:20Seattle/Tacoma Intl
£367
Find similar
British Airways
12 Nov
SEA18:50Seattle/Tacoma Intl
9h 30m
LHR12:20London Heathrow
19 Nov
LHR14:55London Heathrow
10h 00m
SEA16:55Seattle/Tacoma Intl
£368
Find similar
British Airways
12 Nov
SEA18:50Seattle/Tacoma Intl
9h 30m
LHR12:20London Heathrow
19 Nov
LHR14:55London Heathrow
10h 00m
SEA16:55Seattle/Tacoma Intl
£369
Find similar

Aer Lingus flights from State of Washington to United Kingdom

Our best Aer Lingus deals on State of Washington to United Kingdom flight tickets
Aer Lingus
22 Oct
SEA19:35Seattle/Tacoma Intl
12h 20m
1 stop
LHR15:55London Heathrow
31 Oct
LHR12:10London Heathrow
14h 10m
1 stop
SEA19:20Seattle/Tacoma Intl
£352
Find similar
Aer Lingus
14 Sept
SEA19:35Seattle/Tacoma Intl
16h 45m
1 stop
LHR20:20London Heathrow
18 Sept
LHR08:50London Heathrow
17h 00m
1 stop
SEA17:50Seattle/Tacoma Intl
£352
Find similar
Aer Lingus
14 Oct
SEA19:35Seattle/Tacoma Intl
16h 45m
1 stop
LHR20:20London Heathrow
23 Oct
LHR12:00London Heathrow
13h 50m
1 stop
SEA17:50Seattle/Tacoma Intl
£353
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from State of Washington to United Kingdom 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 8 August 2025.
Use the filters below to find and compare flights from Washington to the United Kingdom that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 3/11

15:37-17:50

2 stops18h 13m

London Heathrow

Sun 16/11

09:00-23:15

2 stops22h 15m

£284

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Wed 12/11

20:05-17:50

1 stop13h 45m

London Stansted

Wed 19/11

06:30-18:20

1 stop19h 50m

£343

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 4/11

05:05-09:40

1 stop20h 35m

London Heathrow

Wed 19/11

06:35-13:20

1 stop14h 45m

£349

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 22/10

19:35-15:55

1 stop12h 20m

London Heathrow

Fri 31/10

12:10-19:20

1 stop14h 10m

£352

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 14/9

19:35-20:20

1 stop16h 45m

London Heathrow

Thu 18/9

08:50-17:50

1 stop17h 00m

£352

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 4/11

14:35-10:55

1 stop12h 20m

London Gatwick

Wed 19/11

11:55-17:00

1 stop13h 05m

£362

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 1/10

19:00-14:40

1 stop11h 40m

London Gatwick

Wed 8/10

15:40-17:50

1 stop34h 10m

£363

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 3/9

20:25-14:15

Nonstop9h 50m

London Heathrow

Wed 10/9

17:25-19:50

Nonstop10h 25m

£365

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 19/8

07:20-06:30

1 stop15h 10m

London Heathrow

Wed 3/9

09:00-16:59

1 stop15h 59m

£372

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 18/8

20:25-14:15

Nonstop9h 50m

London Heathrow

Thu 28/8

06:15-11:15

1 stop13h 00m

£378

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from State of Washington to United Kingdom

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 United Kingdom?

The cheapest month to fly to United Kingdom from State of Washington is in October. Flight prices, which tend to average around £496, are often lower during this time because this is during the off-season. If you are unable to visit United Kingdom during the month of October, then departing from State of Washington during the month January is also very affordable. Most momondo users find prices during this month for around £503.

What is the cheapest day to depart on your flight to United Kingdom?

The cheapest day to depart from State of Washington to United Kingdom is on a Tuesday. Travellers who choose to depart for United Kingdom on a Tuesday will often find tickets for as low as £505. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from State of Washington to United Kingdom for around £732.

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

The cheapest time of day to fly to United Kingdom is at midday when flights can be purchased for as low as £587. Try not to purchase tickets in the morning because they tend to be around £1,021. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Washington to United Kingdom flight route?

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

How far in advance should I book a flight to United Kingdom?

You are more likely to see cheaper flights to United Kingdom from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to United Kingdom for around £600 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United Kingdom from State of Washington for as low as £527 on momondo.

What cabin class options are available on Washington to United Kingdom flights?

There are 3 cabin classes available to choose from on Washington to United Kingdom 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 United Kingdom flights?

You could potentially save up to 48% on your flight if you consider stops on a State of Washington to United Kingdom flight.

Cheap State of Washington to United Kingdom flight deals and tips

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

Best price found

£163

Fastest flight time

9h 20m

Direct flights

Every day

Airports in United Kingdom

7 airports
The best one-way flight to United Kingdom from State of Washington in the past 72 hours is £163. The best return flight deal from State of Washington to United Kingdom found on momondo in the last 72 hours is £284.
The fastest flight from State of Washington to United Kingdom takes 9h 20m
Direct flights go from State of Washington to United Kingdom every day.
There are 7 airports near United Kingdom: London City (LCY), London Heathrow (LHR), London Luton (LTN), Edinburgh Turnhouse (EDI), London Stansted (STN), London Gatwick (LGW), Glasgow Intl (GLA)
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  • When did momondo last update prices for flights from Washington to United Kingdom?

    Prices for flights from Washington to United Kingdom are refreshed on a daily basis.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington to United Kingdom.

  • What documentation or ID do you need to fly to United Kingdom?

    The necessary travel and health documents for your United Kingdom trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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

Best airlines flying from State of Washington to United Kingdom

Compare and see reviews for airlines that fly from State of Washington to United Kingdom with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom £354Free CancellationRating
6.6
7,251 reviews
Search British Airways flights
IcelandairPriceFrom £361Free CancellationRating
7.0
524 reviews
Search Icelandair flights
Virgin AtlanticPriceFrom £406Free CancellationRating
7.4
657 reviews
Search Virgin Atlantic flights
Aer LingusPriceFrom £502Free CancellationRating
7.1
1,202 reviews
Search Aer Lingus flights

Why use momondo?

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

It is quick and easy to find Washington to United Kingdom flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to United Kingdom that suits you.

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

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

How can momondo help me find flights from Washington to United Kingdom?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to United Kingdom from Washington.

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

Of course. momondo tracks the price of Washington to United Kingdom flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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