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$213+ Cheap flights from Seattle (SEA) to the United Kingdom

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LHR
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
1 adult, Economy
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Cheap flight deals from Seattle to United Kingdom

Cheapest flights from Seattle to United Kingdom
Explore the most affordable flight options available from Seattle to United Kingdom. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 27, 2026.

This CrystalTravel deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/17:00 pm
SEA
-
GLA
1 stop10h 25m
Icelandair
Sun 4/52:20 pm
GLA
-
SEA
1 stop11h 35m
Icelandair
Deal found 1/26$494
This Mytrip deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/223:40 pm
SEA
-
MAN
2 stops25h 15m
Multiple Airlines
Mon 4/278:00 am
MAN
-
SEA
2 stops20h 40m
Multiple Airlines
Deal found 1/26$494
This oojo deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/307:00 pm
SEA
-
GLA
1 stop10h 25m
Icelandair
Sun 4/52:20 pm
GLA
-
SEA
1 stop11h 35m
Icelandair
Deal found 1/26$509
This oojo deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/237:00 pm
SEA
-
MAN
1 stop32h 40m
Icelandair
Tue 4/281:05 pm
MAN
-
SEA
1 stop12h 50m
Icelandair
Deal found 1/26$516
This oojo deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/237:00 pm
SEA
-
GLA
1 stop10h 25m
Icelandair
Thu 5/142:20 pm
GLA
-
SEA
1 stop11h 35m
Icelandair
Deal found 1/27$517
This oojo deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/37:00 pm
SEA
-
GLA
1 stop10h 25m
Icelandair
Wed 5/132:20 pm
GLA
-
SEA
1 stop11h 35m
Icelandair
Deal found 1/27$525
This oojo deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/303:40 pm
SEA
-
EDI
1 stop13h 40m
Icelandair
Fri 4/102:15 pm
EDI
-
SEA
1 stop14h 25m
Icelandair
Deal found 1/26$528
This oojo deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:00 pm
SEA
-
MAN
1 stop32h 40m
Icelandair
Thu 10/151:05 pm
MAN
-
SEA
1 stop15h 35m
Icelandair
Deal found 1/26$528
This oojo deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:00 pm
SEA
-
LGW
1 stop11h 40m
Icelandair
Mon 10/53:40 pm
LGW
-
SEA
1 stop13h 00m
Icelandair
Deal found 1/27$542
This oojo deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/153:40 pm
SEA
-
LHR
1 stop12h 15m
Icelandair
Fri 4/241:05 pm
LHR
-
SEA
1 stop12h 50m
Icelandair
Deal found 1/27$542
This FlightHub deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/103:35 pm
SEA
-
LGW
1 stop12h 20m
Icelandair
Mon 4/133:40 pm
LGW
-
SEA
1 stop13h 00m
Icelandair
Deal found 1/26$543
This Trip.com deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/163:35 pm
SEA
-
LHR
2 stops22h 45m
Multiple Airlines
Sun 3/296:40 am
LHR
-
SEA
2 stops43h 15m
Multiple Airlines
Deal found 1/26$543

Find flight deals from Seattle to United Kingdom

Keep the following information in mind while searching for Seattle to United Kingdom flight deals. Data was last updated January 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$494
(CrystalTravel)

One-way from

$213
(oojo)

Popular in

June

Cheapest in

October

Average price

$650

Good round-trip deal

$618 or less

Good one-way deal

$370 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-London (LON) flights.
Search Deals
From Seattle/Tacoma Intl to United Kingdom
Search Deals
One-way flight from Seattle/Tacoma Intl to United Kingdom
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($137 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a round-trip flight from Seattle/Tacoma Intl to United Kingdom.
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to United Kingdom.
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated January 27, 2026.
Use the filters below to find and compare flights from Seattle to the United Kingdom that are best for you.

Fly from

Seattle

Fly to

United Kingdom

Route

Depart

Return

Price

SeattleManchester

SEA - MAN

SEAMAN

Seattle/Tacoma Intl

Thu 4/23

7:00 pm-11:40 am

1 stop32h 40m

Manchester

Wed 4/29

1:05 pm-8:40 pm

1 stop15h 35m

$516

SeattleGlasgow

SEA - GLA

SEAGLA

Seattle/Tacoma Intl

Wed 4/1

7:00 pm-1:25 pm

1 stop10h 25m

Glasgow Intl

Sun 4/5

2:20 pm-5:55 pm

1 stop11h 35m

$525

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Thu 4/23

3:40 pm-2:40 pm

1 stop15h 00m

London Gatwick

Sun 5/10

3:40 pm-8:40 pm

1 stop13h 00m

$549

SeattleManchester

SEA - MAN

SEAMAN

Seattle/Tacoma Intl

Thu 4/23

3:40 pm-8:15 pm

2 stops20h 35m

Manchester

Wed 4/29

8:40 am-8:40 pm

2 stops20h 00m

$570

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 3/25

3:35 pm-10:55 am

1 stop12h 20m

London Gatwick

Tue 3/31

3:40 pm-8:40 pm

1 stop13h 00m

$588

SeattleManchester

SEA - MAN

SEAMAN

Seattle/Tacoma Intl

Tue 4/21

2:10 pm-6:30 pm

2 stops20h 20m

Manchester

Mon 4/27

12:55 pm-12:20 pm

2 stops31h 25m

$596

SeattleGlasgow

SEA - GLA

SEAGLA

Seattle/Tacoma Intl

Wed 4/1

7:00 pm-1:25 pm

1 stop10h 25m

Glasgow Intl

Tue 4/7

8:20 am-7:25 pm

2 stops19h 05m

$604

SeattleGlasgow

SEA - GLA

SEAGLA

Seattle/Tacoma Intl

Fri 3/6

6:50 pm-6:00 pm

1 stop15h 10m

Glasgow Intl

Fri 3/13

10:40 am-5:55 pm

1 stop14h 15m

$607

SeattleGlasgow

SEA - GLA

SEAGLA

Seattle/Tacoma Intl

Wed 4/1

7:00 pm-1:25 pm

1 stop10h 25m

Glasgow Intl

Mon 4/6

9:45 pm-7:25 pm

2 stops29h 40m

$610

SeattleManchester

SEA - MAN

SEAMAN

Seattle/Tacoma Intl

Wed 4/22

2:24 pm-11:15 pm

2 stops24h 51m

Manchester

Wed 4/29

7:00 am-4:59 pm

1 stop17h 59m

$617

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 60 results
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Best time to book a flight from Seattle to United Kingdom

Have a flexible travel schedule? Discover the best time to fly to United Kingdom from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to the United Kingdom

What is the cheapest month to book a flight from Seattle to United Kingdom?

Currently, January is the cheapest month in which you can book a flight from Seattle to United Kingdom (average of $446). Flying from Seattle to United Kingdom in June is currently the most expensive (average of $651). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to GB?

Find hourly flight availability from Seattle to United Kingdom. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 27, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to United Kingdom as you normally would.

Weekly flight availability from Seattle to United Kingdom

Explore weekly flight availability from Seattle to United Kingdom. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated January 27, 2026.

The most flights from SEA to GB0 are scheduled on a Tuesday (21 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (7 on average).

How often are flights from Seattle to the United Kingdom delayed?

About 16% of weekly flights between Seattle and United Kingdom have experienced delays in the past year, with the average delay time being 124 minutes.

What is the most punctual flight time for Seattle to the United Kingdom flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Seattle to the United Kingdom flights?

Over the last year, Virgin Atlantic have had the lowest number of delays on this route, with just 6% of flights being delayed.

Reviews of airlines servicing United Kingdom

Get insights into the airlines that provide service to United Kingdom. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to United Kingdom. Reviews last updated January 27, 2026.
Read reviews from past customers who have flown Delta, Virgin Atlantic, and Aer Lingus from Seattle to the United Kingdom. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,124 reviews

Comfort

7.9

Overall

7.9

Entertainment

7.8

Boarding

8.1

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,124 reviews
Delta
7.9
Good
8,124 reviews

Comfort

7.9

Overall

7.9

Entertainment

7.8

Boarding

8.1

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Virgin Atlantic
7.5
Good
678 reviews
Delta
7.9
Good
8,124 reviews

Comfort

7.9

Overall

7.9

Entertainment

7.8

Boarding

8.1

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Aer Lingus
7.2
Good
1,442 reviews
Delta
7.9
Good
8,124 reviews

Comfort

7.9

Overall

7.9

Entertainment

7.8

Boarding

8.1

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Icelandair
7.1
Good
603 reviews
Delta
7.9
Good
8,124 reviews

Comfort

7.9

Overall

7.9

Entertainment

7.8

Boarding

8.1

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
British Airways
6.7
Okay
7,704 reviews
Delta
7.9
Good
8,124 reviews

Comfort

7.9

Overall

7.9

Entertainment

7.8

Boarding

8.1

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Seattle to United Kingdom. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to United Kingdom?

    Located just 11.4 mi from the city center, Seattle/Tacoma Intl (SEA) is the airport most travelers will use when flying to United Kingdom from Seattle.

  • How long is the flight from Seattle to United Kingdom?

    A quick flight from Seattle to United Kingdom can take about 9h 50m. Icelandair provides one of the quickest options available for as low as $617. Seattle and United Kingdom are separated by a distance of 4783 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Seattle to United Kingdom one-way?

    The cheapest airlines for a one-way flight from Seattle to United Kingdom are Icelandair ($162), JetBlue ($181), and WestJet ($225).

  • What are the most popular routes from Seattle to United Kingdom?

    While some choose either Seattle/Tacoma Intl - London Gatwick or Seattle/Tacoma Intl - London Stansted, Seattle/Tacoma Intl - London Heathrow is the most popular route from Seattle to United Kingdom.

  • What are the most reliable airlines from Seattle to United Kingdom?

    Consider KLM (81%), Delta (81%) or Virgin Atlantic (81%) when booking your flight. These represent the most reliable airlines when flying from Seattle to United Kingdom.

  • What are the cheapest flights from Seattle to United Kingdom?

    On average you can expect to pay $2,238 for a flight from Seattle to United Kingdom. The cheapest flight overall is $266 while the most popular route, (Seattle/Tacoma Intl - London Heathrow) is currently priced at $510.

  • Can I find deals for flights from Seattle to United Kingdom that include hotel bookings?

    Yes. In addition to deals on Seattle to United Kingdom flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to United Kingdom?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to United Kingdom.

  • Can I find deals for business class flights from Seattle to United Kingdom?

    Yes. Cheapflights offers flight deals from Seattle to United Kingdom by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to United Kingdom?

    Currently, January is the cheapest month in which you can book a flight from Seattle to United Kingdom (average of $446). Flying from Seattle to United Kingdom in June is currently the most expensive (average of $651). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Seattle to United Kingdom

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Top 10 airlines flying from Seattle to United Kingdom

Discover the top 10 airlines that operate flights from Seattle to United Kingdom. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$213Average$946FlexibilityNo cancel feeOn-time62%
Scandinavian AirlinesCheapest$465Average$718FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$483Average$672FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$500Average$882FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$517Average$838FlexibilityNo cancel feeOn-time71%
Air FranceCheapest$532Average$842FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$535Average$899FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$547Average$813FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$553Average$980FlexibilityNo cancel feeOn-time75%
FinnairCheapest$556Average$694FlexibilityNo cancel feeOn-time76%

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