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Cheap flights from the United Kingdom to Seattle from $302

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 9/8. 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 round-trip flight deals from the United Kingdom to Seattle

Lufthansa Logo
7:25 am - 4:59 pmLHR-SEA
17h 34m1 stop
Lufthansa Logo
2:20 pm - 4:40 pmSEA-LHR
18h 20m1 stop
$456Lufthansa
Find Deal
Fri, Sep 12 - Sun, Sep 21
Logo
10:25 am - 7:36 pmLGW-SEA
17h 11m1 stop
Logo
9:39 pm - 10:55 amSEA-LGW
29h 16m1 stop
$508
Find Deal
Mon, Sep 8 - Sat, Sep 20
Icelandair Logo
9:25 pm - 11:25 amLHR-SEA
22h 00m1 stop
Icelandair Logo
3:45 pm - 11:55 amSEA-LHR
12h 10m1 stop
$535Icelandair
Find Deal
Sat, Sep 13 - Sat, Sep 20
Icelandair Logo
3:40 pm - 8:40 pmLGW-SEA
13h 00m1 stop
Icelandair Logo
3:45 pm - 2:40 pmSEA-LGW
14h 55m1 stop
$543Icelandair
Find Deal
Sat, Sep 27 - Sun, Oct 5
Virgin Atlantic Logo
9:20 am - 4:05 pmLCY-SEA
14h 45m1 stop
Virgin Atlantic Logo
2:10 pm - 4:40 pmSEA-LCY
18h 30m1 stop
$708Virgin Atlantic
Find Deal
Mon, Sep 22 - Mon, Oct 6
British Airways Logo
7:00 am - 11:35 amEDI-SEA
12h 35m1 stop
British Airways Logo
8:20 pm - 4:40 pmSEA-EDI
12h 20m1 stop
$718British Airways
Find Deal
Mon, Sep 22 - Mon, Oct 6
Virgin Atlantic Logo
9:20 am - 10:25 pmLCY-SEA
21h 05m2 stops
Virgin Atlantic Logo
7:50 am - 8:50 amSEA-LCY
17h 00m2 stops
$719Virgin Atlantic
Find Deal
Mon, Sep 8 - Wed, Sep 24
British Airways Logo
5:55 am - 11:35 amEDI-SEA
13h 40m1 stop
British Airways Logo
8:20 pm - 7:35 pmSEA-EDI
15h 15m1 stop
$724British Airways
Find Deal
Wed, Sep 24 - Wed, Oct 22
Delta Logo
6:15 am - 6:55 pmGLA-SEA
20h 40m2 stops
Delta Logo
12:15 pm - 4:10 pmSEA-GLA
19h 55m2 stops
$794Delta
Find Deal
Wed, Aug 27 - Mon, Sep 8
Delta Logo
6:00 am - 11:45 amGLA-SEA
13h 45m1 stop
Delta Logo
1:30 pm - 4:10 pmSEA-GLA
18h 40m2 stops
$803Delta
Find Deal
Tue, Sep 23 - Tue, Oct 7

Air Canada flights from United Kingdom to Seattle

Our best Air Canada deals on United Kingdom to Seattle flight tickets
Air Canada
Sep 22
EDI9:00 amEdinburgh Turnhouse
17h 36m
2 stops
SEA6:36 pmSeattle/Tacoma Intl
Oct 6
SEA5:30 amSeattle/Tacoma Intl
17h 50m
2 stops
EDI7:20 amEdinburgh Turnhouse
$712
Find similar
Air Canada
Sep 24
EDI9:00 amEdinburgh Turnhouse
17h 36m
2 stops
SEA6:36 pmSeattle/Tacoma Intl
Oct 22
SEA7:30 amSeattle/Tacoma Intl
15h 50m
1 stop
EDI7:20 amEdinburgh Turnhouse
$716
Find similar
Air Canada
Aug 12
LHR2:05 pmLondon Heathrow
27h 16m
2 stops
SEA9:21 amSeattle/Tacoma Intl
Aug 20
SEA7:20 amSeattle/Tacoma Intl
15h 10m
1 stop
LHR6:30 amLondon Heathrow
$752
Find similar

British Airways flights from United Kingdom to Seattle

Our best British Airways deals on United Kingdom to Seattle flight tickets
British Airways
Aug 13
LHR10:20 amLondon Heathrow
13h 40m
1 stop
SEA4:00 pmSeattle/Tacoma Intl
Aug 25
SEA1:55 pmSeattle/Tacoma Intl
16h 30m
1 stop
LHR2:25 pmLondon Heathrow
$686
Find similar
British Airways
Sep 22
EDI7:00 amEdinburgh Turnhouse
12h 35m
1 stop
SEA11:35 amSeattle/Tacoma Intl
Oct 6
SEA8:20 pmSeattle/Tacoma Intl
12h 20m
1 stop
EDI4:40 pmEdinburgh Turnhouse
$718
Find similar
British Airways
Aug 4
LHR6:15 amLondon Heathrow
23h 28m
2 stops
SEA9:43 pmSeattle/Tacoma Intl
Aug 11
SEA1:30 pmSeattle/Tacoma Intl
9h 20m
LHR6:50 amLondon Heathrow
$721
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated July 31, 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 9/12

7:25 am-4:59 pm

1 stop17h 34m

Seattle/Tacoma Intl

Sun 9/21

2:20 pm-4:40 pm

1 stop18h 20m

$456

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 9/8

10:25 am-7:36 pm

1 stop17h 11m

Seattle/Tacoma Intl

Sat 9/20

9:39 pm-10:55 am

1 stop29h 16m

$508

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 9/13

9:25 pm-11:25 am

1 stop22h 00m

Seattle/Tacoma Intl

Sat 9/20

3:45 pm-11:55 am

1 stop12h 10m

$535

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 9/27

3:40 pm-8:40 pm

1 stop13h 00m

Seattle/Tacoma Intl

Sun 10/5

3:45 pm-2:40 pm

1 stop14h 55m

$543

LondonSeattle

LCY - SEA

LCYSEA

London City

Mon 9/22

9:20 am-4:05 pm

1 stop14h 45m

Seattle/Tacoma Intl

Mon 10/6

2:10 pm-4:40 pm

1 stop18h 30m

$708

EdinburghSeattle

EDI - SEA

EDISEA

Edinburgh Turnhouse

Mon 9/22

7:00 am-11:35 am

1 stop12h 35m

Seattle/Tacoma Intl

Mon 10/6

8:20 pm-4:40 pm

1 stop12h 20m

$718

LondonSeattle

LCY - SEA

LCYSEA

London City

Mon 9/8

9:20 am-10:25 pm

2 stops21h 05m

Seattle/Tacoma Intl

Wed 9/24

7:50 am-8:50 am

2 stops17h 00m

$719

EdinburghSeattle

EDI - SEA

EDISEA

Edinburgh Turnhouse

Wed 9/24

5:55 am-11:35 am

1 stop13h 40m

Seattle/Tacoma Intl

Wed 10/22

8:20 pm-7:35 pm

1 stop15h 15m

$724

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Wed 8/27

6:15 am-6:55 pm

2 stops20h 40m

Seattle/Tacoma Intl

Mon 9/8

12:15 pm-4:10 pm

2 stops19h 55m

$794

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Tue 9/23

6:00 am-11:45 am

1 stop13h 45m

Seattle/Tacoma Intl

Tue 10/7

1:30 pm-4:10 pm

2 stops18h 40m

$803

Flights are sorted by cheapest round-trip 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?

In general, January is the cheapest month to fly from United Kingdom to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $634. If you don’t want to visit Seattle in January, then you should wait until March to fly from United Kingdom, when ticket prices are also cheap, with an average price of $657.

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

On average, the least expensive day to fly to Seattle from United Kingdom is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $791. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Friday is the most expensive day to depart from United Kingdom because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,145.

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

Flying to Seattle from United Kingdom at noon is the least expensive time of day to depart. momondo users have found prices as low as $845 when looking at flights departing at noon. Flights to Seattle are more costly in the morning, with an average ticket price of $894. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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 $778 when searching weeks out. 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 $704 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

$302

Fastest flight time

11h 30m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from United Kingdom in the past 72 hours is $302. The best round-trip flight deal from United Kingdom to Seattle found on momondo in the last 72 hours is $456.
The fastest flight from United Kingdom to Seattle takes 11h 30m
Direct flights go from United Kingdom to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)
Search flight deals

  • 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 were last updated today.

  • 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 required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable 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
IcelandairPriceFrom $402Free CancellationRating
7.0
520 reviews
Search Icelandair flights
British AirwaysPriceFrom $421Free CancellationRating
6.6
7,222 reviews
Search British Airways flights
IberiaPriceFrom $575Free CancellationRating
7.0
2,859 reviews
Search Iberia flights
Virgin AtlanticPriceFrom $594Free CancellationRating
7.4
655 reviews
Search Virgin Atlantic flights
American AirlinesPriceFrom $620Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $632Free CancellationRating
8.0
7,981 reviews
Search Delta flights

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
Tacoma
SeaTac
Ocean Shores
Olympia
Renton
Kent
Federal Way
Puyallup
Lynnwood
Marysville
Tukwila
Kirkland
Lakewood
Fife
Centralia
Cle Elum
Shoreline
Westport
Redmond

Why use momondo?

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

It is quick and easy to find United Kingdom to Seattle 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 Seattle that suits you.

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 offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from United Kingdom to Seattle.

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

Yes momondo offers price alerts on flights to Seattle from United Kingdom. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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