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Cheap flights from Washington to the United Kingdom from £183

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 15/10. 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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0 bags

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Cheap return flights

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Scandinavian Airlines Logo
15:55 - 18:25
SEA
-
EDI
18h 30m
1 stop
Scandinavian Airlines Logo
17:00 - 13:45
EDI
-
SEA
28h 45m
2 stops
£517Scandinavian Airlines
Sat, 3 Oct - Mon, 5 Oct
Multiple Airlines Logo
15:40 - 00:35
SEA
-
EDI
24h 55m
2 stops
Multiple Airlines Logo
20:05 - 11:45
EDI
-
SEA
23h 40m
2 stops
£530Multiple Airlines
Mon, 1 Jun - Mon, 15 Jun
Multiple Airlines Logo
23:25 - 00:20
SEA
-
EDI
16h 55m
2 stops
Multiple Airlines Logo
10:55 - 11:45
EDI
-
SEA
32h 50m
2 stops
£544Multiple Airlines
Wed, 10 Jun - Wed, 17 Jun
Icelandair Logo
15:40 - 14:40
SEA
-
LGW
15h 00m
1 stop
Icelandair Logo
15:40 - 20:40
LGW
-
SEA
13h 00m
1 stop
£631Icelandair
Tue, 28 Jul - Wed, 12 Aug
Icelandair Logo
15:40 - 11:55
SEA
-
LHR
12h 15m
1 stop
Icelandair Logo
21:25 - 11:45
LHR
-
SEA
22h 20m
1 stop
£631Icelandair
Tue, 4 Aug - Wed, 19 Aug
United Airlines Logo
23:59 - 07:45
SEA
-
LHR
23h 46m
1 stop
United Airlines Logo
07:25 - 16:59
LHR
-
SEA
17h 34m
1 stop
£638United Airlines
Sun, 6 Sep - Wed, 9 Sep
Turkish Airlines Logo
19:10 - 09:55
SEA
-
STN
30h 45m
1 stop
Turkish Airlines Logo
17:35 - 17:15
STN
-
SEA
31h 40m
1 stop
£643Turkish Airlines
Wed, 23 Sep - Sun, 4 Oct
Turkish Airlines Logo
19:10 - 09:55
SEA
-
STN
30h 45m
1 stop
Turkish Airlines Logo
17:35 - 17:15
STN
-
SEA
31h 40m
1 stop
£644Turkish Airlines
Wed, 23 Sep - Sun, 4 Oct
Delta Logo
23:07 - 06:25
PDX
-
LHR
23h 18m
1 stop
Delta Logo
06:30 - 11:10
LHR
-
PDX
12h 40m
1 stop
£686Delta
Sat, 8 Aug - Tue, 18 Aug
Delta Logo
13:33 - 13:05
PDX
-
LHR
15h 32m
1 stop
Delta Logo
06:30 - 11:10
LHR
-
PDX
12h 40m
1 stop
£687Delta
Mon, 17 Aug - Sun, 30 Aug

United Airlines flights from State of Washington to United Kingdom

Our best United Airlines deals on State of Washington to United Kingdom flight tickets
United Airlines
6 Sept
SEA23:59Seattle/Tacoma Intl
23h 46m
1 stop
LHR07:45London Heathrow
9 Sept
LHR07:25London Heathrow
17h 34m
1 stop
SEA16:59Seattle/Tacoma Intl
£638
United Airlines
15 May
PDX05:30Portland
20h 40m
2 stops
LHR10:10London Heathrow
17 May
LHR06:50London Heathrow
21h 52m
2 stops
PDX20:42Portland
£915
United Airlines
14 May
SEA07:00Seattle/Tacoma Intl
17h 05m
2 stops
EDI08:05Edinburgh Turnhouse
21 May
EDI11:30Edinburgh Turnhouse
15h 35m
1 stop
SEA19:05Seattle/Tacoma Intl
£920

Alaska Airlines flights from State of Washington to United Kingdom

Our best Alaska Airlines deals on State of Washington to United Kingdom flight tickets
Alaska Airlines
5 Nov
PDX08:05Portland
20h 15m
1 stop
LHR12:20London Heathrow
3 Dec
LHR14:45London Heathrow
15h 59m
1 stop
PDX22:44Portland
£702
Alaska Airlines
28 May
PDX17:46Portland
13h 19m
1 stop
LHR15:05London Heathrow
1 Jun
LHR17:00London Heathrow
14h 59m
1 stop
PDX23:59Portland
£921

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 14 May 2026.
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

Cheapest return flight

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Sat 3/10

15:55-18:25

1 stop18h 30m

Edinburgh Turnhouse

Mon 5/10

17:00-13:45

2 stops28h 45m

£517

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Mon 1/6

15:40-00:35

2 stops24h 55m

Edinburgh Turnhouse

Mon 15/6

20:05-11:45

2 stops23h 40m

£530

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Wed 10/6

23:25-00:20

2 stops16h 55m

Edinburgh Turnhouse

Wed 17/6

10:55-11:45

2 stops32h 50m

£544
Fastest return journey

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 28/7

15:40-14:40

1 stop15h 00m

London Gatwick

Wed 12/8

15:40-20:40

1 stop13h 00m

£631

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 4/8

15:40-11:55

1 stop12h 15m

London Heathrow

Wed 19/8

21:25-11:45

1 stop22h 20m

£631

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 6/9

23:59-07:45

1 stop23h 46m

London Heathrow

Wed 9/9

07:25-16:59

1 stop17h 34m

£638

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Wed 23/9

19:10-09:55

1 stop30h 45m

London Stansted

Sun 4/10

17:35-17:15

1 stop31h 40m

£643

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Wed 23/9

19:10-09:55

1 stop30h 45m

London Stansted

Sun 4/10

17:35-17:15

1 stop31h 40m

£644

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 8/8

23:07-06:25

1 stop23h 18m

London Heathrow

Tue 18/8

06:30-11:10

1 stop12h 40m

£686

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 17/8

13:33-13:05

1 stop15h 32m

London Heathrow

Sun 30/8

06:30-11:10

1 stop12h 40m

£687

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 the United Kingdom from

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 January. Flight prices, which tend to average around £237, 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 January, then departing from State of Washington during the month April is also very affordable. Most momondo users find prices during this month for around £510.

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 £508. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from State of Washington to United Kingdom for around £649.

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 in the evening when flights can be purchased for as low as £541. Try not to purchase tickets in the afternoon because they tend to be around £610. 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 from Washington to the 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 £609 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 £538 on momondo.

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

You could potentially save up to 49% 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

£443

Fastest flight time

9h 15m

Direct flights

Every day

Airports in United Kingdom

1,286 airports
The best one-way flight to United Kingdom from State of Washington in the past 72 hours is £443. The best return flight deal from State of Washington to United Kingdom found on momondo in the last 72 hours is £684.
The fastest flight from State of Washington to United Kingdom takes 9h 15m
Direct flights go from State of Washington to United Kingdom every day.
There are 1,286 airports in United Kingdom. From State of Washington there are direct flights to London Heathrow (LHR).
Search flight deals

Frequently asked questions about flying from Washington to the United Kingdom

  • 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 £350Free CancellationRating
6.7
7,979 reviews
Search British Airways flights
Virgin AtlanticPriceFrom £365Free CancellationRating
7.4
688 reviews
Search Virgin Atlantic flights
IcelandairPriceFrom £407Free CancellationRating
7.0
654 reviews
Search Icelandair flights
Aer LingusPriceFrom £497Free CancellationRating
7.3
1,561 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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Find better results for your trip to the United Kingdom

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Popular flights according to clicks in the last 7 days on momondo
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