United Kingdom

$216+ 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 7/30. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LHR
jun. 17 — jun. 241
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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 junio 12, 2025.

Round-trip from

$565
(oojo)

One-way from

$216
(Mytrip)

Popular in

June

Cheapest in

January

Average price

$1,028

Good round-trip deal

$665 or less

Good one-way deal

$445 or less
From Seattle/Tacoma Intl to United Kingdom
One-way flight from Seattle/Tacoma Intl to United Kingdom
Highest demand for flights based on searches. 15% potential increase in price ($147 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
Average for round-trip flights in June 2025
Price to beat on a round-trip flight from Seattle/Tacoma Intl to United Kingdom.
Price to beat on a one-way flight from Seattle/Tacoma Intl to United Kingdom.

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 junio 12, 2025.

This oojo deal was found by Cheapflights users on 6/11. 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.
mar. 10/73:45 pmSEA - MAN
1 stop11h 55mIcelandair
mié. 11/511:55 amMAN - SEA
1 stop13h 05mIcelandair
Deal found 6/11$565
This American Airlines deal was found by Cheapflights users on 6/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/207:55 amSEA - INV
2 stops17h 35mMultiple Airlines
mar. 9/23:45 pmINV - SEA
1 stop27h 50mMultiple Airlines
Deal found 6/12$609
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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.
mié. 8/204:00 pmSEA - EDI
1 stop13h 05mScandinavian Airlines
sáb. 9/67:55 pmEDI - SEA
2 stops25h 55mScandinavian Airlines
Deal found 6/11$613
This American Airlines deal was found by Cheapflights users on 6/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/201:30 pmSEA - INV
1 stop17h 05mAmerican Airlines
mar. 9/23:45 pmINV - SEA
1 stop34h 35mAmerican Airlines
Deal found 6/12$614
This Kiwi.com deal was found by Cheapflights users on 6/11. 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.
mié. 8/277:35 pmSEA - MAN
1 stop18h 45mMultiple Airlines
mié. 9/1011:30 amMAN - SEA
1 stop14h 20mMultiple Airlines
Deal found 6/11$614
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
mar. 7/227:35 pmSEA - EDI
1 stop19h 25mMultiple Airlines
mar. 8/57:40 amEDI - SEA
1 stop18h 10mMultiple Airlines
Deal found 6/10$618
This Cheapflightsfares deal was found by Cheapflights users on 6/10. 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.
dom. 8/244:00 pmSEA - MAN
2 stops19h 45mScandinavian Airlines
dom. 8/318:10 pmMAN - SEA
2 stops25h 40mScandinavian Airlines
Deal found 6/10$623
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/73:13 pmSEA - MAN
2 stops16h 02mAmerican Airlines
mié. 11/56:10 amMAN - SEA
1 stop18h 45mAmerican Airlines
Deal found 6/11$628
This Lucky2Go deal was found by Cheapflights users on 6/10. 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 Lucky2Go is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/47:35 pmSEA - EDI
1 stop16h 15mAer Lingus
mié. 8/2011:55 amEDI - SEA
1 stop13h 55mAer Lingus
Deal found 6/10$633
This Gurufare deal was found by Cheapflights users on 6/11. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/113:09 pmSEA - INV
2 stops34h 21mBritish Airways
mié. 8/203:40 pmINV - SEA
1 stop27h 55mBritish Airways
Deal found 6/11$634
This Mytrip deal was found by Cheapflights users on 6/10. 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.
lun. 8/47:20 amSEA - EDI
1 stop17h 45mAir Canada
mié. 8/209:00 amEDI - SEA
2 stops32h 21mAir Canada
Deal found 6/10$637
This Orbitz deal was found by Cheapflights users on 6/10. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/21:30 pmSEA - MAN
1 stop15h 40mBritish Airways
lun. 9/87:45 pmMAN - SEA
1 stop23h 25mBritish Airways
Deal found 6/10$637

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 junio 12, 2025.
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

mar. 10/7

3:45 pm-11:40 am

1 stop11h 55m

Manchester

mié. 11/5

11:55 am-5:00 pm

1 stop13h 05m

$565

SeattleInverness

SEA - INV

SEAINV

Seattle/Tacoma Intl

mié. 8/20

7:55 am-9:30 am

2 stops17h 35m

Inverness

mar. 9/2

3:45 pm-11:35 am

1 stop27h 50m

$609

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

mié. 8/20

4:00 pm-1:05 pm

1 stop13h 05m

Edinburgh Turnhouse

sáb. 9/6

7:55 pm-1:50 pm

2 stops25h 55m

$613

SeattleInverness

SEA - INV

SEAINV

Seattle/Tacoma Intl

mié. 8/20

1:30 pm-2:35 pm

1 stop17h 05m

Inverness

mar. 9/2

3:45 pm-6:20 pm

1 stop34h 35m

$614

SeattleManchester

SEA - MAN

SEAMAN

Seattle/Tacoma Intl

mié. 8/27

7:35 pm-10:20 pm

1 stop18h 45m

Manchester

mié. 9/10

11:30 am-5:50 pm

1 stop14h 20m

$614

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

mar. 7/22

7:35 pm-11:00 pm

1 stop19h 25m

Edinburgh Turnhouse

mar. 8/5

7:40 am-5:50 pm

1 stop18h 10m

$618

SeattleManchester

SEA - MAN

SEAMAN

Seattle/Tacoma Intl

dom. 8/24

4:00 pm-7:45 pm

2 stops19h 45m

Manchester

dom. 8/31

8:10 pm-1:50 pm

2 stops25h 40m

$623

SeattleManchester

SEA - MAN

SEAMAN

Seattle/Tacoma Intl

mar. 10/7

3:13 pm-3:15 pm

2 stops16h 02m

Manchester

mié. 11/5

6:10 am-4:55 pm

1 stop18h 45m

$628

SeattleEdinburgh

SEA - EDI

SEAEDI

Seattle/Tacoma Intl

lun. 8/4

7:35 pm-7:50 pm

1 stop16h 15m

Edinburgh Turnhouse

mié. 8/20

11:55 am-5:50 pm

1 stop13h 55m

$633

SeattleInverness

SEA - INV

SEAINV

Seattle/Tacoma Intl

lun. 8/11

3:09 pm-9:30 am

2 stops34h 21m

Inverness

mié. 8/20

3:40 pm-11:35 am

1 stop27h 55m

$634

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

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, 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 $1,108). 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 junio 12, 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 junio 12, 2025.

The most flights from SEA to GB0 are scheduled on a Monday (22 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 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 junio 12, 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.
8.0
Very good

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good
8.0
Very good

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 Icelandair ($216), WestJet ($284), and JetBlue ($369).

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

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

    Consider Aeromexico (92%), KLM (87%) or Air France (87%) 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 $2,939 for a flight from Seattle to United Kingdom. The cheapest flight overall is $380 while the most popular route, (Seattle/Tacoma Intl - London Heathrow) is currently priced at $435.

  • 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 $1,108). 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

Browse thousands of different options on Cheapflights for your next trip

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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.

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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$378Average$895FlexibilityNo cancel feeOn-time76%
IcelandairCheapest$500Average$703FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$532Average$741FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$550Average$910FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$568Average$834FlexibilityNo cancel feeOn-time71%
IberiaCheapest$579Average$734FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$583Average$938FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$584Average$1,036FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$585Average$885FlexibilityNo cancel feeOn-time70%
Virgin AtlanticCheapest$595Average$948FlexibilityNo cancel feeOn-time72%

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