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Cheap flights from the United Kingdom to Seattle from £251

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 25/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
28 Mar — 4 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from United Kingdom to Seattle

Enter your travel dates to find the best prices.

Cheapest flights from United Kingdom to Seattle
Explore the most affordable flight options available from United Kingdom to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 February 2026.

Wed 15/413:05
MAN
-
SEA
1 stop12h 50m
Icelandair
Wed 29/415:40
SEA
-
MAN
1 stop12h 00m
Icelandair
Deal found 26/2£356
Tue 14/413:05
MAN
-
SEA
1 stop15h 35m
Icelandair
Wed 29/415:40
SEA
-
MAN
1 stop12h 00m
Icelandair
Deal found 26/2£357
Fri 12/606:40
LHR
-
SEA
1 stop15h 05m
Scandinavian Airlines
Sat 5/915:55
SEA
-
LHR
1 stop16h 05m
Scandinavian Airlines
Deal found 24/2£371
Wed 15/413:05
MAN
-
SEA
1 stop12h 50m
Icelandair
Sun 26/415:40
SEA
-
MAN
1 stop12h 00m
Icelandair
Deal found 26/2£375
Tue 14/413:05
MAN
-
SEA
1 stop15h 35m
Icelandair
Sun 26/415:40
SEA
-
MAN
1 stop12h 00m
Icelandair
Deal found 26/2£376
Mon 18/513:05
LHR
-
SEA
1 stop15h 35m
Icelandair
Fri 22/523:25
SEA
-
LHR
1 stop12h 55m
Icelandair
Deal found 24/2£381
Wed 13/515:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Sun 24/519:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 24/2£384
Sat 7/313:45
LHR
-
SEA
1 stop28h 55m
United Airlines
Mon 9/307:00
SEA
-
LHR
1 stop15h 55m
United Airlines
Deal found 23/2£385
Thu 9/413:05
MAN
-
SEA
1 stop15h 35m
Icelandair
Mon 27/415:40
SEA
-
MAN
1 stop12h 00m
Icelandair
Deal found 26/2£388
Wed 15/413:05
MAN
-
SEA
1 stop12h 50m
Icelandair
Thu 23/415:40
SEA
-
MAN
1 stop12h 00m
Icelandair
Deal found 26/2£390
Tue 14/413:05
MAN
-
SEA
1 stop15h 35m
Icelandair
Thu 23/415:40
SEA
-
MAN
1 stop12h 00m
Icelandair
Deal found 26/2£390
Fri 12/606:40
LHR
-
SEA
1 stop15h 05m
Scandinavian Airlines
Fri 4/915:55
SEA
-
LHR
1 stop13h 40m
Scandinavian Airlines
Deal found 24/2£395

Find flight deals from United Kingdom to Seattle

Keep the following information in mind while searching for United Kingdom to Seattle flight deals. Data was last updated 26 February 2026.

Round-trip from

£356

One-way from

£251

Popular in

July

Cheapest in

February

Average price

£481

Good round-trip deal

£493 or less

Good one-way deal

£470 or less
Icelandair
  • Icelandair
  • 15/4-29/4
  • 2 total stops
  • 24h 50m total
  • United Kingdom to Seattle
Search Deals
25/5
  • 25/5
  • 2 total stops
  • 28h 30m total
  • United Kingdom to Seattle
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£55 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from United Kingdom to Seattle/Tacoma Intl.
Search Deals
Price to beat on a one-way flight from United Kingdom to Seattle/Tacoma Intl.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from United Kingdom to Seattle 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 858,174 searches. Data last updated 26 February 2026.
Use the filters below to find and compare flights from the United Kingdom to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Mon 13/4

08:15-20:40

2 stops20h 25m

Seattle/Tacoma Intl

Mon 27/4

15:40-15:45

2 stops16h 05m

£440

LondonSeattle

STN - SEA

STNSEA

London Stansted

Mon 13/4

06:30-20:40

2 stops22h 10m

Seattle/Tacoma Intl

Mon 20/4

15:40-23:20

2 stops23h 40m

£446

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Mon 13/4

08:15-20:40

2 stops20h 25m

Seattle/Tacoma Intl

Mon 20/4

15:40-22:50

2 stops23h 10m

£448

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 25/4

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Sat 2/5

15:40-14:40

1 stop15h 00m

£451

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Thu 5/3

11:55-17:00

1 stop13h 05m

Seattle/Tacoma Intl

Mon 9/3

15:35-10:55

1 stop12h 20m

£452

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 25/4

21:25-20:40

1 stop31h 15m

Seattle/Tacoma Intl

Sat 2/5

15:40-11:55

1 stop12h 15m

£473

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Thu 16/4

09:25-17:10

1 stop15h 45m

Seattle/Tacoma Intl

Thu 23/4

19:10-23:25

1 stop20h 15m

£475

EdinburghSeattle

EDI - SEA

EDISEA

Edinburgh Turnhouse

Fri 10/4

07:35-17:10

1 stop17h 35m

Seattle/Tacoma Intl

Fri 17/4

19:10-15:35

1 stop12h 25m

£500

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 18/3

11:55-18:00

1 stop13h 05m

Seattle/Tacoma Intl

Thu 16/4

19:00-14:40

1 stop11h 40m

£511

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

Mon 18/5

19:10-22:55

2 stops35h 45m

Seattle/Tacoma Intl

Sun 31/5

15:55-12:05

2 stops36h 10m

£549

Flights are sorted by cheapest return flights first.

Deals found on 23/2

Showing 1-10 of 60 resultsSorted by cheapest first
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6

Best time to book a flight from United Kingdom to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from United Kingdom with our price prediction graph.
Estimated return 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 the United Kingdom to Seattle

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

Currently, January is the cheapest month in which you can book a flight from United Kingdom to Seattle (average of £346). Flying from United Kingdom to Seattle in August is currently the most expensive (average of £463). 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 GB to SEA?

Find hourly flight availability from United Kingdom to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 26 February 2026.

When flying from United Kingdom to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from United Kingdom to Seattle

Explore weekly flight availability from United Kingdom to Seattle. 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 26 February 2026.

The most flights from GB0 to SEA are scheduled on a Monday (15 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (11 on average).

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

About 11% of weekly flights between United Kingdom and Seattle have experienced delays in the past year, with the average delay time being 125 minutes.

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

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

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

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

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

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

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated 26 February 2026.
Read reviews from past customers who have flown with KLM, Virgin Atlantic, andAir France from the United Kingdom to Seattle. 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.
KLM
7.7
Good
1,460 reviews
Check prices

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.6

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.7
Good
1,460 reviews
KLM
7.7
Good
1,460 reviews
Check prices

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.6

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Virgin Atlantic
7.5
Good
679 reviews
KLM
7.7
Good
1,460 reviews
Check prices

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.6

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Air France
7.4
Good
1,538 reviews
KLM
7.7
Good
1,460 reviews
Check prices

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.6

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Icelandair
7.1
Good
617 reviews
KLM
7.7
Good
1,460 reviews
Check prices

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.6

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
British Airways
6.7
Okay
7,770 reviews
KLM
7.7
Good
1,460 reviews
Check prices

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.6

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

Related info for your journey

Find useful and relevant information for your journey from United Kingdom to Seattle. 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 into for flights to Seattle from United Kingdom?

    For a flight from United Kingdom to Seattle, you will be flying into Seattle/Tacoma Intl. Seattle/Tacoma Intl (SEA) is just 11.4 mi from the center of the city.

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

    A quick flight from United Kingdom to Seattle can take about 13h. Scandinavian Airlines provides one of the quickest options available for as low as £451. Airlines will cover a distance of 4807 mi. Both multi-stop and direct flights can be found to your destination and back.

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

    For one-way options, check prices for Virgin Atlantic. According to our data, you can fly for as low as £343. Users have also found prices from £350 and £367 on Icelandair and British Airways, respectively.

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

    The most popular flight routes from United Kingdom to Seattle are London Heathrow - Seattle/Tacoma Intl, London Gatwick - Seattle/Tacoma Intl and London Stansted - Seattle/Tacoma Intl.

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

    The top 3 most reliable airlines when flying from United Kingdom to Seattle are KLM (90%), Air France (90%) and Delta (90%).

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

    Looking for the cheapest flight from United Kingdom to Seattle? While on average our users pay £1,768, our data indicates the cheapest price to be £396. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around £381.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from United Kingdom to Seattle 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 United Kingdom to Seattle?

    Currently, January is the cheapest month in which you can book a flight from United Kingdom to Seattle (average of £346). Flying from United Kingdom to Seattle in August is currently the most expensive (average of £463). 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

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Federal Way
SeaTac

Browse thousands of different options on Cheapflights for your next trip

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Top 10 airlines flying from United Kingdom to Seattle

Discover the top 10 airlines that operate flights from United Kingdom to Seattle. 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 858,174 searches. Data last updated 26 February 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£333Average£574FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£338Average£537FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£360Average£574FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£414Average£765FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
United AirlinesCheapest£419Average£626FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£427Average£671FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£438Average£605FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air FranceCheapest£447Average£731FlexibilityNo cancel feeOn-time77%
Search Air France flights
FinnairCheapest£454Average£598FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Scandinavian AirlinesCheapest£458Average£656FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from United Kingdom to Seattle?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from United Kingdom to Seattle. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from United Kingdom to Seattle?

Cheapflights helps you find that perfect flight to Seattle from United Kingdom by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from United Kingdom to Seattle with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from United Kingdom to Seattle, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from United Kingdom to Seattle become cheaper?

Yes! Start tracking prices for United Kingdom to Seattle flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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