Cheap flights from the United Kingdom to Seattle from £283

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United Kingdom to Seattle departing on 15/9. 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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Find the cheapest flights from the United Kingdom to Seattle

Recent return flight deals from the United Kingdom to Seattle

Lufthansa Logo
07:25 - 16:59LHR-SEA
17h 34m1 stop
Lufthansa Logo
14:20 - 16:40SEA-LHR
18h 20m1 stop
£345Lufthansa
Find Deal
Fri, 12 Sep - Sun, 21 Sep
Lufthansa Logo
07:25 - 16:59LHR-SEA
17h 34m1 stop
Lufthansa Logo
14:20 - 14:40SEA-LHR
16h 20m1 stop
£391Lufthansa
Find Deal
Wed, 17 Sep - Sun, 21 Sep
Icelandair Logo
15:40 - 17:50LGW-SEA
34h 10m1 stop
Icelandair Logo
19:00 - 14:35SEA-LGW
11h 35m1 stop
£408Icelandair
Find Deal
Mon, 15 Sep - Mon, 22 Sep
Icelandair Logo
15:40 - 20:40LGW-SEA
13h 00m1 stop
Icelandair Logo
15:45 - 14:40SEA-LGW
14h 55m1 stop
£410Icelandair
Find Deal
Tue, 16 Sep - Tue, 23 Sep
Virgin Atlantic Logo
20:10 - 11:45LCY-SEA
23h 35m1 stop
Virgin Atlantic Logo
17:40 - 16:40SEA-LCY
15h 00m1 stop
£532Virgin Atlantic
Find Deal
Mon, 8 Sep - Mon, 22 Sep
Virgin Atlantic Logo
09:20 - 16:05LCY-SEA
14h 45m1 stop
Virgin Atlantic Logo
14:10 - 16:40SEA-LCY
18h 30m1 stop
£535Virgin Atlantic
Find Deal
Mon, 22 Sep - Mon, 6 Oct
British Airways Logo
07:00 - 11:35EDI-SEA
12h 35m1 stop
British Airways Logo
20:20 - 16:40SEA-EDI
12h 20m1 stop
£543British Airways
Find Deal
Mon, 22 Sep - Mon, 6 Oct
British Airways Logo
05:50 - 11:35GLA-SEA
13h 45m1 stop
British Airways Logo
13:30 - 10:20SEA-GLA
12h 50m1 stop
£544British Airways
Find Deal
Mon, 15 Sep - Wed, 24 Sep
KLM Logo
06:15 - 11:35GLA-SEA
13h 20m1 stop
KLM Logo
14:10 - 16:10SEA-GLA
18h 00m1 stop
£578KLM
Find Deal
Wed, 27 Aug - Mon, 8 Sep
KLM Logo
06:15 - 15:55GLA-SEA
17h 40m1 stop
KLM Logo
14:10 - 13:00SEA-GLA
14h 50m1 stop
£581KLM
Find Deal
Wed, 27 Aug - Mon, 8 Sep

Lufthansa flights from United Kingdom to Seattle

Our best Lufthansa deals on United Kingdom to Seattle flight tickets
Lufthansa
12 Sept
LHR07:25London Heathrow
17h 34m
1 stop
SEA16:59Seattle/Tacoma Intl
21 Sept
SEA14:20Seattle/Tacoma Intl
18h 20m
1 stop
LHR16:40London Heathrow
Lufthansa
17 Sept
LHR07:25London Heathrow
17h 34m
1 stop
SEA16:59Seattle/Tacoma Intl
21 Sept
SEA14:20Seattle/Tacoma Intl
16h 20m
1 stop
LHR14:40London Heathrow
Lufthansa
8 Sept
LHR06:30London Heathrow
13h 25m
1 stop
SEA11:55Seattle/Tacoma Intl
24 Sept
SEA14:20Seattle/Tacoma Intl
12h 20m
1 stop
LHR10:40London Heathrow

Scandinavian Airlines flights from United Kingdom to Seattle

Our best Scandinavian Airlines deals on United Kingdom to Seattle flight tickets
Scandinavian Airlines
7 Oct
LHR10:35London Heathrow
35h 25m
2 stops
SEA14:00Seattle/Tacoma Intl
15 Oct
SEA16:20Seattle/Tacoma Intl
45h 00m
2 stops
LHR21:20London Heathrow
Scandinavian Airlines
25 Sept
BHX19:10Birmingham
26h 50m
1 stop
SEA14:00Seattle/Tacoma Intl
8 Oct
SEA16:20Seattle/Tacoma Intl
18h 15m
1 stop
BHX18:35Birmingham
Scandinavian Airlines
25 Sept
BHX19:10Birmingham
26h 50m
1 stop
SEA14:00Seattle/Tacoma Intl
8 Oct
SEA16:20Seattle/Tacoma Intl
18h 15m
1 stop
BHX18:35Birmingham

momondo Fare Finder

 
Customise your flight search to find flights from United Kingdom to Seattle 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 2 August 2025.
Use the filters below to find and compare flights from the United Kingdom to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 12/9

07:25-16:59

1 stop17h 34m

Seattle/Tacoma Intl

Sun 21/9

14:20-16:40

1 stop18h 20m

£345

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 17/9

07:25-16:59

1 stop17h 34m

Seattle/Tacoma Intl

Sun 21/9

14:20-14:40

1 stop16h 20m

£391

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 15/9

15:40-17:50

1 stop34h 10m

Seattle/Tacoma Intl

Mon 22/9

19:00-14:35

1 stop11h 35m

£408

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Tue 16/9

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Tue 23/9

15:45-14:40

1 stop14h 55m

£410

LondonSeattle

LCY - SEA

LCYSEA

London City

Mon 8/9

20:10-11:45

1 stop23h 35m

Seattle/Tacoma Intl

Mon 22/9

17:40-16:40

1 stop15h 00m

£532

LondonSeattle

LCY - SEA

LCYSEA

London City

Mon 22/9

09:20-16:05

1 stop14h 45m

Seattle/Tacoma Intl

Mon 6/10

14:10-16:40

1 stop18h 30m

£535

EdinburghSeattle

EDI - SEA

EDISEA

Edinburgh Turnhouse

Mon 22/9

07:00-11:35

1 stop12h 35m

Seattle/Tacoma Intl

Mon 6/10

20:20-16:40

1 stop12h 20m

£543

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Mon 15/9

05:50-11:35

1 stop13h 45m

Seattle/Tacoma Intl

Wed 24/9

13:30-10:20

1 stop12h 50m

£544

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Wed 27/8

06:15-11:35

1 stop13h 20m

Seattle/Tacoma Intl

Mon 8/9

14:10-16:10

1 stop18h 00m

£578

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Wed 27/8

06:15-15:55

1 stop17h 40m

Seattle/Tacoma Intl

Mon 8/9

14:10-13:00

1 stop14h 50m

£581

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 Seattle from

How to get the cheapest flight ticket from United Kingdom to Seattle

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 Seattle?

The cheapest month to fly to Seattle from United Kingdom is in January. Flight prices, which tend to average around £479, are often lower during this time because this is during the off-season. The month of March is another great option to travel to Seattle, with average flight prices from United Kingdom averaging around £497.

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

According to our data, Tuesday is the cheapest day to fly to Seattle from United Kingdom. The lowest ticket price found for a Tuesday departure recently was £604. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Seattle on Sunday is £727.

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

According to our data, the cheapest time of day to fly to Seattle is in the evening. momondo users have found flights departing from United Kingdom to Seattle in the evening for as low as £534. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive, with an average ticket price of £645.

What is the cheapest United Kingdom to Seattle/Tacoma Intl flight route?

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

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

You are more likely to see cheaper flights to Seattle from United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around £588 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from United Kingdom for as low as £532 on momondo.

What cabin class options are available on United Kingdom to Seattle/Tacoma Intl flights?

There are 4 cabin classes available to choose from on United Kingdom to Seattle/Tacoma Intl 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 United Kingdom to Seattle flights?

No. A direct flight is the cheapest option for a flight between United Kingdom to Seattle.

Cheap United Kingdom to Seattle flight deals and tips

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

Best price found

£283

Fastest flight time

11h 30m

Direct flights

Mon, Tue, Wed, Thu, Fri and Sun

Airports in Seattle

1 airport
The best one-way flight to Seattle from United Kingdom in the past 72 hours is £283. The best return flight deal from United Kingdom to Seattle found on momondo in the last 72 hours is £345.
The fastest flight from United Kingdom to Seattle takes 11h 30m
Direct flights go from United Kingdom to Seattle on Monday, Tuesday, Wednesday, Thursday, Friday and Sunday. Airlines offering direct flights are: Virgin Atlantic, Delta and Finnair.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

  • When did momondo last update prices for flights from United Kingdom to Seattle/Tacoma Intl Airport?

    Prices for flights from United Kingdom to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from United Kingdom to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from United Kingdom to Seattle/Tacoma Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from United Kingdom to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The necessary travel and health documents for your Seattle/Tacoma Intl Airport 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 United Kingdom to Seattle?


Best airlines flying from United Kingdom to Seattle

Compare and see reviews for airlines that fly from United Kingdom to Seattle with momondo
Airline
Rating
Free Cancellation
Price
Aer LingusPriceFrom £8Free CancellationRating
7.1
1,193 reviews
Search Aer Lingus flights
IcelandairPriceFrom £330Free CancellationRating
7.0
520 reviews
Search Icelandair flights
Air FrancePriceFrom £391Free CancellationRating
7.5
1,465 reviews
Search Air France flights
LufthansaPriceFrom £391Free CancellationRating
6.8
7,276 reviews
Search Lufthansa flights
United AirlinesPriceFrom £405Free CancellationRating
7.4
8,904 reviews
Search United Airlines flights
FinnairPriceFrom £410Free CancellationRating
7.6
1,317 reviews
Search Finnair flights
KLMPriceFrom £411Free CancellationRating
7.8
1,384 reviews
Search KLM flights
British AirwaysPriceFrom £431Free CancellationRating
6.6
7,224 reviews
Search British Airways flights
Virgin AtlanticPriceFrom £449Free CancellationRating
7.4
655 reviews
Search Virgin Atlantic flights
DeltaPriceFrom £451Free CancellationRating
8.0
7,983 reviews
Search Delta flights

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Kent
SeaTac
Fife
Tukwila
Renton

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from United Kingdom to Seattle. momondo saves you time and could save you money on your trip.

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

Flights from United Kingdom to Seattle with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo provides multiple filters to help you find the best flight to Seattle from United Kingdom. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from United Kingdom and alert you when they change.


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