Which airline has the best punctuality record on $[0,article:'genitive ']$[0,place:'genitive'] $[1, preposition:'to ']$[1, article:'to ']$[1, place:'to'] flights?

According to our data, La Costena have had the least number of delays on this route over the last 12 months; with no flights being classified as delayed.

What is the cheapest airline that flies from Seattle/Tacoma Intl to United Kingdom?

Icelandair, British Airways, and American Airlines are the most popular carriers operating from Seattle/Tacoma Intl to United Kingdom

How often are flights $[0, preposition:'from ']$[0, article:'from ']$[0, place:'from'] $[1, preposition:'to ']$[1, article:'to ']$[1, place:'to'] delayed?

Historically, on average around 15% of flights between $[0, place:'genitive'] and $[1, place:'genitive'] have experienced a delay on any given week. The average delay length over the past 12 months has been 126 minutes.

How many flights depart from Seattle to United Kingdom on average per day?

The number of flights available between Seattle and United Kingdom is 14 per day as of November 2025. The most frequent departure time is 4:00PM, with 54% of daily flights leaving in the afternoon.

What is the most punctual flight time for $[0,article:'genitive ']$[0,place:'genitive'] $[1, preposition:'to ']$[1, article:'to ']$[1, place:'to'] flights?

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

How many flights depart from Seattle to United Kingdom on average per week?

As of November 2025, there are 104 flights per week flying from Seattle to United Kingdom. The most common day of the week flights depart is Fri, with 17% of flights taking off on this day.

What airlines fly to United Kingdom?

British Airways, Delta and Icelandair are the top three most popular airlines that fly to United Kingdom from Seattle according to our data. British Airways is the first choice among our users, with 42% of people opting to fly with this airline when traveling to United Kingdom. Keep in mind that there are 16 different airlines that fly to United Kingdom on a routine basis, so you have a few additional options to choose from.

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?

The number of operators available for flights from Seattle/Tacoma Intl Airport to United Kingdom is 16 as of November 2025.

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.

$271 Cheap Flights from Seattle to the United Kingdom in 2025/26

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Cheap round-trip flights

Enter your travel dates to find the best prices.

2:35 pm - 8:20 pmSEA-GLA

21h 45m2 stops

8:25 am - 5:00 pmGLA-SEA

16h 35m2 stops

$475Multiple Airlines

Find Deal

Tue, Jan 6 - Tue, Jan 13

2:35 pm - 9:55 amSEA-GLA

11h 20m1 stop

12:35 pm - 5:00 pmGLA-SEA

12h 25m1 stop

$486Icelandair

Find Deal

Fri, Jan 9 - Fri, Jan 16

2:35 pm - 10:20 amSEA-EDI

11h 45m1 stop

11:20 am - 5:00 pmEDI-SEA

13h 40m1 stop

$486Icelandair

Find Deal

Sat, Jan 31 - Sun, Feb 15

11:55 pm - 7:05 amSEA-LHR

23h 10m1 stop

6:30 am - 11:50 amLHR-SEA

13h 20m1 stop

$581Delta

Find Deal

Mon, Dec 1 - Thu, Dec 11

6:50 pm - 5:10 pmSEA-GLA

14h 20m1 stop

6:35 am - 4:55 pmGLA-SEA

18h 20m1 stop

$583British Airways

Find Deal

Sat, Feb 7 - Sat, Feb 14

11:55 pm - 7:05 amSEA-LHR

23h 10m1 stop

12:20 pm - 2:58 pmLHR-SEA

10h 38mnonstop

$587Delta

Find Deal

Sun, Nov 30 - Tue, Dec 9

1:35 pm - 10:05 amSEA-EDI

12h 30m1 stop

6:05 am - 11:30 amEDI-SEA

13h 25m1 stop

$588British Airways

Find Deal

Fri, Jan 9 - Fri, Jan 16

6:50 pm - 12:20 pmSEA-LHR

9h 30mnonstop

2:55 pm - 4:55 pmLHR-SEA

10h 00mnonstop

$589American Airlines

Find Deal

Wed, Jan 21 - Wed, Feb 18

3:05 pm - 5:20 pmSEA-LCY

18h 15m1 stop

8:05 pm - 11:35 amLCY-SEA

23h 30m1 stop

$640Virgin Atlantic

Find Deal

Tue, Feb 10 - Tue, Mar 3

3:10 pm - 5:20 pmSEA-LCY

18h 10m1 stop

10:00 am - 8:41 amLCY-SEA

30h 41m2 stops

$643Virgin Atlantic

Find Deal

Wed, Jan 14 - Mon, Feb 2

Icelandair flights from Seattle to United Kingdom

Our best Icelandair deals on Seattle to United Kingdom flight tickets

Icelandair

Jan 31

SEA2:35 pmSeattle/Tacoma Intl

11h 45m

1 stop

EDI10:20 amEdinburgh Turnhouse

Feb 15

EDI11:20 amEdinburgh Turnhouse

13h 40m

1 stop

SEA5:00 pmSeattle/Tacoma Intl

$486

Find similar

Icelandair

Jan 31

SEA2:35 pmSeattle/Tacoma Intl

11h 20m

1 stop

GLA9:55 amGlasgow Intl

Feb 15

GLA12:35 pmGlasgow Intl

12h 25m

1 stop

SEA5:00 pmSeattle/Tacoma Intl

$487

Find similar

Icelandair

Mar 23

SEA3:35 pmSeattle/Tacoma Intl

11h 45m

1 stop

EDI10:20 amEdinburgh Turnhouse

Mar 29

EDI2:15 pmEdinburgh Turnhouse

14h 30m

1 stop

SEA8:45 pmSeattle/Tacoma Intl

$489

Find similar

Delta flights from Seattle to United Kingdom

Our best Delta deals on Seattle to United Kingdom flight tickets

Delta

Dec 1

SEA11:55 pmSeattle/Tacoma Intl

23h 10m

1 stop

LHR7:05 amLondon Heathrow

Dec 11

LHR6:30 amLondon Heathrow

13h 20m

1 stop

SEA11:50 amSeattle/Tacoma Intl

$581

Find similar

Delta

Nov 30

SEA11:55 pmSeattle/Tacoma Intl

23h 10m

1 stop

LHR7:05 amLondon Heathrow

Dec 11

LHR12:20 pmLondon Heathrow

10h 38m

SEA2:58 pmSeattle/Tacoma Intl

$587

Find similar

Delta

Dec 1

SEA7:20 pmSeattle/Tacoma Intl

9h 30m

LHR12:50 pmLondon Heathrow

Dec 8

LHR5:35 pmLondon Heathrow

25h 50m

1 stop

SEA11:25 amSeattle/Tacoma Intl

$588

Find similar

momondo Fare Finder

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

SeattleGlasgow

SEA - GLA

SEAGLA

Seattle/Tacoma Intl

Tue 1/6

2:35 pm-8:20 pm

2 stops21h 45m

Glasgow Intl

Tue 1/13

8:25 am-5:00 pm

2 stops16h 35m

$475

SeattleGlasgow

SEA - GLA

SEAGLA

Seattle/Tacoma Intl

Fri 1/9

2:35 pm-9:55 am

1 stop11h 20m

Glasgow Intl

Fri 1/16

12:35 pm-5:00 pm

1 stop12h 25m

$486

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Sat 1/31

2:35 pm-10:20 am

1 stop11h 45m

Edinburgh Turnhouse

Sun 2/15

11:20 am-5:00 pm

1 stop13h 40m

$486

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 12/1

11:55 pm-7:05 am

1 stop23h 10m

London Heathrow

Thu 12/11

6:30 am-11:50 am

1 stop13h 20m

$581

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

$583

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 11/30

11:55 pm-7:05 am

1 stop23h 10m

London Heathrow

Tue 12/9

12:20 pm-2:58 pm

Nonstop10h 38m

$587

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Fri 1/9

1:35 pm-10:05 am

1 stop12h 30m

Edinburgh Turnhouse

Fri 1/16

6:05 am-11:30 am

1 stop13h 25m

$588

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 1/21

6:50 pm-12:20 pm

Nonstop9h 30m

London Heathrow

Wed 2/18

2:55 pm-4:55 pm

Nonstop10h 00m

$589

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 2/10

3:05 pm-5:20 pm

1 stop18h 15m

London City

Tue 3/3

8:05 pm-11:35 am

1 stop23h 30m

$640

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 1/14

3:10 pm-5:20 pm

1 stop18h 10m

London City

Mon 2/2

10:00 am-8:41 am

2 stops30h 41m

$643

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Delays

Other information

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 $647. If you aren’t able to travel to United Kingdom during the month of October, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $661.

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 $807. The most expensive day to fly to United Kingdom is Friday, with ticket prices averaging around $907.

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 $836. 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 $801 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 $704 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 9% 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	$472
Fastest flight time	9h 15m
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 $472. The best round-trip flight deal from Seattle to United Kingdom found on momondo in the last 72 hours is $670.

The fastest flight from Seattle to United Kingdom takes 9h 15m

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?
The number of operators available for flights from Seattle/Tacoma Intl Airport to United Kingdom is 16 as of November 2025.
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?
momondo data reveals that the most frequently booked plane model on the route from Seattle to United Kingdom is Boeing 787-10 Dreamliner, representing 24.89% of all bookings. The subsequent popular models are Airbus A330-200 at 16.87%, Boeing 787-9 Dreamliner at 14.64%, and Airbus A330-900neo at 12.30%.

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
JetBlue	PriceFrom $213	Free Cancellation	Rating 7.2 2,902 reviews	Search JetBlue flights
Scandinavian Airlines	PriceFrom $465	Free Cancellation	Rating 7.4 1,584 reviews	Search Scandinavian Airlines flights
Icelandair	PriceFrom $482	Free Cancellation	Rating 7.0 581 reviews	Search Icelandair flights
Aer Lingus	PriceFrom $500	Free Cancellation	Rating 7.2 1,377 reviews	Search Aer Lingus flights
Air France	PriceFrom $517	Free Cancellation	Rating 7.4 1,493 reviews	Search Air France flights
American Airlines	PriceFrom $518	Free Cancellation	Rating 7.2 11,047 reviews	Search American Airlines flights
British Airways	PriceFrom $546	Free Cancellation	Rating 6.7 7,533 reviews	Search British Airways flights
United Airlines	PriceFrom $547	Free Cancellation	Rating 7.4 9,029 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $553	Free Cancellation	Rating 8.0 11,326 reviews	Search Alaska Airlines flights
Finnair	PriceFrom $556	Free Cancellation	Rating 7.6 1,334 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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

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Find better results for your trip to the United Kingdom

Popular cities in the United Kingdom

Flights to Londonfrom $328

Flights to Manchesterfrom $372

Flights to Edinburghfrom $385

Flights to Glasgowfrom $394

Flights to Birminghamfrom $390

Flights to Newcastle upon Tynefrom $424

Flights to Belfastfrom $510

Flights to Bristolfrom $427

Flights to Invernessfrom $425

Flights to Liverpoolfrom $416

Flights to Aberdeenfrom $516

Flights to Leedsfrom $425

Cheap flights from Seattle to the United Kingdom from $268

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 1/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Seattle to the United Kingdom

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Icelandair flights from Seattle to United Kingdom

Our best Icelandair deals on Seattle to United Kingdom flight tickets

Delta flights from Seattle to United Kingdom

Our best Delta deals on Seattle to United Kingdom flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Seattle to the United Kingdom that are best for you.

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?

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 $807. The most expensive day to fly to United Kingdom is Friday, with ticket prices averaging around $907.

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

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?

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 9% on your flight if you consider stops on a Seattle to United Kingdom flight.

What is the cheapest airline that flies from Seattle/Tacoma Intl to United Kingdom?

Icelandair, British Airways, and American Airlines are the most popular carriers operating from Seattle/Tacoma Intl to United Kingdom

What airlines fly to United Kingdom?

How often are flights $[0, preposition:'from ']$[0, article:'from ']$[0, place:'from'] $[1, preposition:'to ']$[1, article:'to ']$[1, place:'to'] delayed?

Historically, on average around 15% of flights between $[0, place:'genitive'] and $[1, place:'genitive'] have experienced a delay on any given week. The average delay length over the past 12 months has been 126 minutes.

What is the most punctual flight time for $[0,article:'genitive ']$[0,place:'genitive'] $[1, preposition:'to ']$[1, article:'to ']$[1, place:'to'] flights?

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

Which airline has the best punctuality record on $[0,article:'genitive ']$[0,place:'genitive'] $[1, preposition:'to ']$[1, article:'to ']$[1, place:'to'] flights?

According to our data, La Costena have had the least number of delays on this route over the last 12 months; with no flights being classified as delayed.

How many flights depart from Seattle to United Kingdom on average per day?

The number of flights available between Seattle and United Kingdom is 14 per day as of November 2025. The most frequent departure time is 4:00PM, with 54% of daily flights leaving in the afternoon.

How many flights depart from Seattle to United Kingdom on average per week?

As of November 2025, there are 104 flights per week flying from Seattle to United Kingdom. The most common day of the week flights depart is Fri, with 17% of flights taking off on this day.

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

Fastest flight time

Direct flights

Airports in United Kingdom

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

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?

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

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

Why use momondo?

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

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

How can momondo help me find flights 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?

An easier way to manage your United Kingdom trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

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