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$269+ 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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LHR
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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Cheap 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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$556
(oojo)

One-way from

$269
(FlightHub)

Popular in

June

Cheapest in

January

Average price

$709

Good round-trip deal

$695 or less

Good one-way deal

$488 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-London (LON) flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-London (LON) flights.
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From Seattle/Tacoma Intl to United Kingdom
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One-way flight from Seattle/Tacoma Intl to United Kingdom
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Highest demand for flights based on searches. 22% potential increase in price ($232 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to United Kingdom.
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Price to beat on a one-way flight from Seattle/Tacoma Intl to United Kingdom.
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Find 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 February 20, 2025.

This oojo deal was found by Cheapflights users on 2/19. 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 5/17:00 pmSEA - MAN
1 stop32h 40mIcelandair
Wed 5/71:05 pmMAN - SEA
1 stop12h 45mIcelandair
Deal found 2/19$556
This Flightnetwork deal was found by Cheapflights users on 2/19. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/166:45 pmSEA - LHR
1 stop13h 10mAer Lingus
Wed 4/3012:00 pmLHR - SEA
1 stop12h 59mAer Lingus
Deal found 2/19$583
This Cheapflightsfares deal was found by Cheapflights users on 2/19. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/257:50 pmSEA - LHR
Nonstop9h 25mIberia
Wed 4/29:50 amLHR - SEA
Nonstop9h 45mIberia
Deal found 2/19$584
This oojo deal was found by Cheapflights users on 2/20. 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.
Sat 3/12:35 pmSEA - LHR
1 stop12h 15mIcelandair
Wed 3/512:15 pmLHR - SEA
1 stop12h 45mIcelandair
Deal found 2/20$586
This Ticket deal was found by Cheapflights users on 2/19. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/18:20 pmSEA - LHR
Nonstop9h 55mVirgin Atlantic
Thu 4/101:25 pmLHR - SEA
Nonstop10h 20mVirgin Atlantic
Deal found 2/19$592
This Mytrip deal was found by Cheapflights users on 2/19. 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.
Sun 3/303:45 pmSEA - LGW
1 stop12h 00mIcelandair
Thu 4/31:00 pmLGW - SEA
1 stop12h 50mIcelandair
Deal found 2/19$593
This Kiwi.com deal was found by Cheapflights users on 2/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/66:45 pmSEA - EDI
1 stop17h 05mAer Lingus
Tue 4/2211:55 amEDI - SEA
1 stop13h 04mAer Lingus
Deal found 2/18$599
This Finnair deal was found by Cheapflights users on 2/19. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/291:35 pmSEA - LHR
1 stop12h 55mFinnair
Wed 5/79:30 amLHR - SEA
1 stop14h 30mFinnair
Deal found 2/19$600
This lol.travel deal was found by Cheapflights users on 2/18. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/93:05 pmSEA - LHR
1 stop12h 05mAir Canada
Tue 3/258:55 amLHR - SEA
2 stops19h 35mAir Canada
Deal found 2/18$601
This Cheapflightsfares deal was found by Cheapflights users on 2/18. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/11:30 pmSEA - MAN
1 stop15h 40mBritish Airways
Wed 4/92:00 pmMAN - SEA
1 stop12h 20mBritish Airways
Deal found 2/18$602
This Delta deal was found by Cheapflights users on 2/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/197:15 amSEA - MAN
1 stop16h 45mDelta
Wed 3/2612:00 pmMAN - SEA
1 stop17h 22mDelta
Deal found 2/20$610
This Kiwi.com deal was found by Cheapflights users on 2/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/283:45 pmSEA - LHR
1 stop12h 10mMultiple Airlines
Wed 5/76:15 amLHR - SEA
2 stops22h 13mMultiple Airlines
Deal found 2/19$613

Find flights from Seattle to United Kingdom within your budget

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 February 20, 2025.

Fly from

Seattle

Fly to

United Kingdom

Route

Depart

Return

Price

SeattleManchester

SEA - MAN

SEAMAN

Seattle/Tacoma Intl

Thu 5/1

7:00 pm-11:40 am

1 stop32h 40m

Manchester

Wed 5/7

1:05 pm-5:50 pm

1 stop12h 45m

$556

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 4/16

6:45 pm-3:55 pm

1 stop13h 10m

London Heathrow

Wed 4/30

12:00 pm-4:59 pm

1 stop12h 59m

$583

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 3/25

7:50 pm-12:15 pm

Nonstop9h 25m

London Heathrow

Wed 4/2

9:50 am-11:35 am

Nonstop9h 45m

$584

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 4/1

3:45 pm-11:55 am

1 stop12h 10m

London Heathrow

Tue 4/15

9:25 pm-8:40 pm

1 stop31h 15m

$588

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 4/1

8:20 pm-2:15 pm

Nonstop9h 55m

London Heathrow

Thu 4/10

1:25 pm-3:45 pm

Nonstop10h 20m

$592

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 3/30

3:45 pm-11:45 am

1 stop12h 00m

London Gatwick

Thu 4/3

1:00 pm-5:50 pm

1 stop12h 50m

$593

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

Sun 4/6

6:45 pm-7:50 pm

1 stop17h 05m

Edinburgh Turnhouse

Tue 4/22

11:55 am-4:59 pm

1 stop13h 04m

$599

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 4/29

1:35 pm-10:30 am

1 stop12h 55m

London Heathrow

Wed 5/7

9:30 am-4:00 pm

1 stop14h 30m

$600

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 3/9

3:05 pm-10:10 am

1 stop12h 05m

London Heathrow

Tue 3/25

8:55 am-9:30 pm

2 stops19h 35m

$601

SeattleManchester

SEA - MAN

SEAMAN

Seattle/Tacoma Intl

Tue 4/1

1:30 pm-1:10 pm

1 stop15h 40m

Manchester

Wed 4/9

2:00 pm-6:20 pm

1 stop12h 20m

$602

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

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.

Travel insights for flights from Seattle to United Kingdom

Get recent, data-driven insights about flights from Seattle to United Kingdom including ideal travel times, pricing trends, and more.

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

Currently, November is the cheapest month in which you can book a flight from Seattle to United Kingdom (average of $661). Flying from Seattle to United Kingdom in June is currently the most expensive (average of $1,136). 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 February 20, 2025.

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 February 20, 2025.

The most flights from SEA to GB0 are scheduled on a Wednesday (16 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (12 on average).

Rainfall in United Kingdom by month

Plan your trip to United Kingdom by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in United Kingdom ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit United Kingdom when rainfall is around 1.6 in.

Temperature in United Kingdom by month

Plan your trip to United Kingdom by taking into account the average temperature totals by month.

If weather is an important factor for your trip to United Kingdom, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

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 February 20, 2025.
See what other customers who have flown with Delta, KLM and Finnair from Seattle to United Kingdom have to say. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,227 reviews

Overall

8.0

Comfort

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
8,227 reviews
Delta
8.0
Very good
8,227 reviews

Overall

8.0

Comfort

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
8,227 reviews

Overall

8.0

Comfort

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair
7.6
Good
1,274 reviews
Delta
8.0
Very good
8,227 reviews

Overall

8.0

Comfort

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

SWISS
7.5
Good
1,572 reviews
Delta
8.0
Very good
8,227 reviews

Overall

8.0

Comfort

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Virgin Atlantic
7.5
Good
654 reviews
Delta
8.0
Very good
8,227 reviews

Overall

8.0

Comfort

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • 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 WestJet ($269), Icelandair ($277), and Air Canada ($394).

  • 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 City, 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 Aeromexico (82%), Singapore Airlines (81%) or American Airlines (72%) 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 $1,685 for a flight from Seattle to United Kingdom. The cheapest flight overall is $404 while the most popular route, (Seattle/Tacoma Intl - London Heathrow) is currently priced at $541.

  • 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, November is the cheapest month in which you can book a flight from Seattle to United Kingdom (average of $661). Flying from Seattle to United Kingdom in June is currently the most expensive (average of $1,136). 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.

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Alternative routes for Seattle to United Kingdom

See prices for flight routes from nearby airports that may be better suited for you.
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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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$500Average$756FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$519Average$899FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$568Average$878FlexibilityNo cancel feeOn-time71%
Aer LingusCheapest$579Average$969FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$583Average$752FlexibilityNo cancel feeOn-time77%
DeltaCheapest$584Average$1,029FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$586Average$946FlexibilityNo cancel feeOn-time70%
FinnairCheapest$586Average$762FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$588Average$1,053FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$595Average$1,006FlexibilityNo cancel feeOn-time69%
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