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Cheap flights from Seattle to the United Kingdom from $260

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to the United Kingdom departing on 10/25. 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 round-trip flights

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Icelandair Logo
2:35 pm - 10:45 amSEA-MAN
12h 10m1 stop
Icelandair Logo
11:55 am - 5:00 pmMAN-SEA
13h 05m1 stop
$501Icelandair
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Wed, Nov 5 - Tue, Nov 11
Multiple Airlines Logo
8:05 pm - 10:15 pmSEA-EDI
18h 10m1 stop
Multiple Airlines Logo
7:25 am - 6:20 pmEDI-SEA
18h 55m1 stop
$503Multiple Airlines
Find Deal
Wed, Dec 3 - Wed, Dec 10
Aer Lingus Logo
8:05 pm - 7:15 pmSEA-MAN
15h 10m1 stop
Aer Lingus Logo
1:55 pm - 6:20 pmMAN-SEA
12h 25m1 stop
$606Aer Lingus
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Wed, Nov 19 - Wed, Nov 26
Aer Lingus Logo
9:05 pm - 3:35 pmSEA-LHR
11h 30m1 stop
Aer Lingus Logo
12:10 pm - 6:20 pmLHR-SEA
14h 10m1 stop
$606Aer Lingus
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Fri, Oct 31 - Fri, Nov 7
Delta Logo
5:00 am - 6:05 amSEA-LHR
17h 05m1 stop
Delta Logo
6:30 am - 11:45 amLHR-SEA
13h 15m1 stop
$609Delta
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Sun, Nov 2 - Tue, Nov 18
Delta Logo
7:20 am - 10:10 amSEA-MAN
18h 50m2 stops
Delta Logo
5:50 am - 11:45 amMAN-SEA
13h 55m1 stop
$620Delta
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Wed, Nov 19 - Wed, Nov 26
British Airways Logo
6:50 pm - 4:00 pmSEA-NCL
13h 10m1 stop
British Airways Logo
6:45 am - 4:55 pmNCL-SEA
18h 10m1 stop
$648British Airways
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Fri, Dec 5 - Mon, Dec 15
British Airways Logo
6:50 pm - 5:10 pmSEA-GLA
14h 20m1 stop
British Airways Logo
6:35 am - 4:55 pmGLA-SEA
18h 20m1 stop
$650British Airways
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Sat, Feb 7 - Sat, Feb 14
Virgin Atlantic Logo
3:10 pm - 5:20 pmSEA-LCY
18h 10m1 stop
Virgin Atlantic Logo
5:50 pm - 11:40 amLCY-SEA
25h 50m1 stop
$651Virgin Atlantic
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Mon, Jan 26 - Wed, Feb 4
Virgin Atlantic Logo
3:05 pm - 7:35 pmSEA-LCY
20h 30m1 stop
Virgin Atlantic Logo
8:05 pm - 5:00 pmLCY-SEA
28h 55m2 stops
$653Virgin Atlantic
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Mon, Dec 8 - Wed, Jan 14

Scandinavian Airlines flights from Seattle to United Kingdom

Our best Scandinavian Airlines deals on Seattle to United Kingdom flight tickets
Scandinavian Airlines
Oct 16
SEA2:10 pmSeattle/Tacoma Intl
20h 20m
2 stops
LHR6:30 pmLondon Heathrow
Oct 22
LHR6:40 amLondon Heathrow
15h 20m
1 stop
SEA2:00 pmSeattle/Tacoma Intl
$564
Find similar
Scandinavian Airlines
Oct 18
SEA12:45 pmSeattle/Tacoma Intl
21h 45m
2 stops
LHR6:30 pmLondon Heathrow
Oct 21
LHR7:30 pmLondon Heathrow
26h 30m
1 stop
SEA2:00 pmSeattle/Tacoma Intl
$570
Find similar
Scandinavian Airlines
Oct 15
SEA12:45 pmSeattle/Tacoma Intl
24h 55m
2 stops
LHR9:40 pmLondon Heathrow
Oct 22
LHR6:40 amLondon Heathrow
15h 20m
1 stop
SEA2:00 pmSeattle/Tacoma Intl
$584
Find similar

Lufthansa flights from Seattle to United Kingdom

Our best Lufthansa deals on Seattle to United Kingdom flight tickets
Lufthansa
Nov 2
SEA3:40 pmSeattle/Tacoma Intl
12h 10m
1 stop
LHR11:50 amLondon Heathrow
Nov 18
LHR6:30 amLondon Heathrow
13h 40m
1 stop
SEA12:10 pmSeattle/Tacoma Intl
$576
Find similar
Lufthansa
Nov 2
SEA3:40 pmSeattle/Tacoma Intl
12h 10m
1 stop
LHR11:50 amLondon Heathrow
Nov 18
LHR6:30 amLondon Heathrow
13h 40m
1 stop
SEA12:10 pmSeattle/Tacoma Intl
$578
Find similar
Lufthansa
Nov 12
SEA10:05 amSeattle/Tacoma Intl
16h 05m
2 stops
LHR10:10 amLondon Heathrow
Nov 19
LHR7:40 amLondon Heathrow
13h 40m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$598
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momondo Fare Finder

 
Customize your flight search to find flights from Seattle 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 832,500 searches. Data last updated October 5, 2025.
Use the filters below to find and compare flights from Seattle to the United Kingdom that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleManchester

SEA - MAN

SEAMAN

Seattle/Tacoma Intl

Wed 11/5

2:35 pm-10:45 am

1 stop12h 10m

Manchester

Tue 11/11

11:55 am-5:00 pm

1 stop13h 05m

$501

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Wed 12/3

8:05 pm-10:15 pm

1 stop18h 10m

Edinburgh Turnhouse

Wed 12/10

7:25 am-6:20 pm

1 stop18h 55m

$503

SeattleManchester

SEA - MAN

SEAMAN

Seattle/Tacoma Intl

Wed 11/19

8:05 pm-7:15 pm

1 stop15h 10m

Manchester

Wed 11/26

1:55 pm-6:20 pm

1 stop12h 25m

$606

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Fri 10/31

9:05 pm-3:35 pm

1 stop11h 30m

London Heathrow

Fri 11/7

12:10 pm-6:20 pm

1 stop14h 10m

$606

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 11/2

5:00 am-6:05 am

1 stop17h 05m

London Heathrow

Tue 11/18

6:30 am-11:45 am

1 stop13h 15m

$609

SeattleManchester

SEA - MAN

SEAMAN

Seattle/Tacoma Intl

Wed 11/19

7:20 am-10:10 am

2 stops18h 50m

Manchester

Wed 11/26

5:50 am-11:45 am

1 stop13h 55m

$620

SeattleNewcastle upon Tyne

SEA - NCL

SEANCL

Seattle/Tacoma Intl

Fri 12/5

6:50 pm-4:00 pm

1 stop13h 10m

Newcastle upon Tyne

Mon 12/15

6:45 am-4:55 pm

1 stop18h 10m

$648

SeattleGlasgow

SEA - GLA

SEAGLA

Seattle/Tacoma Intl

Sat 2/7

6:50 pm-5:10 pm

1 stop14h 20m

Glasgow Intl

Sat 2/14

6:35 am-4:55 pm

1 stop18h 20m

$650

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 1/26

3:10 pm-5:20 pm

1 stop18h 10m

London City

Wed 2/4

5:50 pm-11:40 am

1 stop25h 50m

$651

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 12/8

3:05 pm-7:35 pm

1 stop20h 30m

London City

Wed 1/14

8:05 pm-5:00 pm

2 stops28h 55m

$653

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 the United Kingdom from

How to get the cheapest flight ticket from Seattle 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?

In general, October is the cheapest month to fly from Seattle to United Kingdom. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $661. If you aren’t able to travel to United Kingdom during the month of October, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $678.

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

The cheapest day to depart from Seattle to United Kingdom is on a Tuesday when prices can be found for as low as $814. The most expensive day to fly to United Kingdom is Friday, with ticket prices averaging around $911.

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

According to our data, the cheapest time of day to fly to United Kingdom is in the evening. momondo users have found flights departing from Seattle to United Kingdom in the evening for as low as $841. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to United Kingdom are more costly in the morning, with an average ticket price of $980. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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

Fly from Seattle/Tacoma Intl to London Heathrow for the best Seattle/Tacoma Intl - 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 Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to United Kingdom for around $802 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United Kingdom from Seattle for as low as $705 on momondo.

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

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

You could potentially save up to 15% on your flight if you consider stops on a Seattle to United Kingdom flight.

Cheap Seattle to United Kingdom flight deals and tips

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

Best Price Found

$409

Fastest flight time

9h 20m

Direct flights

Every day

Airports in United Kingdom

1 airport
The best one-way flight to United Kingdom from Seattle in the past 72 hours is $409. The best round-trip flight deal from Seattle to United Kingdom found on momondo in the last 72 hours is $664.
The fastest flight from Seattle to United Kingdom takes 9h 20m
Direct flights go from Seattle to United Kingdom every day.
There is 1 airport near United Kingdom: London Heathrow (LHR)
Search flight deals

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

    Prices for flights from Seattle/Tacoma Intl Airport to United Kingdom refresh daily.

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

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

    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 Seattle/Tacoma Intl Airport 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 Seattle to United Kingdom?

Best airlines flying from Seattle to United Kingdom

Compare and see reviews for airlines that fly from Seattle to United Kingdom with momondo
Airline
Rating
Free Cancellation
Price
JetBluePriceFrom $213Free CancellationRating
7.2
2,907 reviews
Search JetBlue flights
LufthansaPriceFrom $378Free CancellationRating
6.8
7,453 reviews
Search Lufthansa flights
IcelandairPriceFrom $483Free CancellationRating
7.0
549 reviews
Search Icelandair flights
Aer LingusPriceFrom $500Free CancellationRating
7.2
1,313 reviews
Search Aer Lingus flights
Air FrancePriceFrom $517Free CancellationRating
7.4
1,467 reviews
Search Air France flights
American AirlinesPriceFrom $520Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Scandinavian AirlinesPriceFrom $532Free CancellationRating
7.4
1,525 reviews
Search Scandinavian Airlines flights
United AirlinesPriceFrom $547Free CancellationRating
7.4
8,953 reviews
Search United Airlines flights
British AirwaysPriceFrom $547Free CancellationRating
6.7
7,423 reviews
Search British Airways flights
FinnairPriceFrom $556Free CancellationRating
7.6
1,332 reviews
Search Finnair flights

Why use momondo?

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

It is quick and easy to find Seattle 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 Seattle to United Kingdom with flexible booking policies on momondo?

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

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

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 Seattle to United Kingdom.

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

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

An easier way to manage your United Kingdom trip

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Find better results for your trip to the United Kingdom

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo
Flights to Londonfrom $307
Flights to Manchesterfrom $318
Flights to Edinburghfrom $318
Flights to Glasgowfrom $325
Flights to Birminghamfrom $403
Flights to Newcastle upon Tynefrom $440
Flights to Belfastfrom $539
Flights to Bristolfrom $435
Flights to Invernessfrom $420
Flights to Liverpoolfrom $472
Flights to Aberdeenfrom $487
Flights to Leedsfrom $431