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Cheap flights from the United Kingdom to Seattle from £261

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 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
27 Feb — 6 Mar1
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 28 January 2026.

Mon 2/220:35
LHR
-
SEA
1 stop28h 25m
Icelandair
Mon 9/214:35
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 26/1£351
Wed 13/515:40
LGW
-
SEA
1 stop34h 15m
Icelandair
Sun 24/519:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 27/1£352
Sat 7/212:15
LHR
-
SEA
1 stop12h 45m
Icelandair
Mon 9/214:35
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 26/1£352
Sat 16/515:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Sat 23/515:40
SEA
-
LGW
1 stop12h 05m
Icelandair
Deal found 26/1£353
Wed 25/212:15
LHR
-
SEA
1 stop12h 45m
Icelandair
Wed 11/315:35
SEA
-
LHR
1 stop20h 55m
Icelandair
Deal found 26/1£353
Mon 23/220:35
LHR
-
SEA
1 stop28h 25m
Icelandair
Tue 10/315:35
SEA
-
LHR
1 stop20h 55m
Icelandair
Deal found 26/1£354
Fri 10/415:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Mon 20/415:40
SEA
-
LGW
1 stop15h 00m
Icelandair
Deal found 26/1£357
Thu 26/211:55
LGW
-
SEA
1 stop13h 05m
Icelandair
Thu 5/314:35
SEA
-
LGW
1 stop12h 20m
Icelandair
Deal found 27/1£357
Mon 16/220:05
LHR
-
SEA
2 stops35h 25m
Multiple Airlines
Mon 2/320:00
SEA
-
LHR
2 stops30h 10m
Multiple Airlines
Deal found 27/1£357
Sun 1/320:35
LHR
-
SEA
1 stop28h 25m
Icelandair
Thu 5/314:35
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 26/1£358
Thu 9/415:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Wed 29/419:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 27/1£359
Mon 2/220:35
LHR
-
SEA
1 stop28h 25m
Icelandair
Sun 8/214:35
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 27/1£360

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 28 January 2026.

Round-trip from

£351

One-way from

£261

Popular in

July

Cheapest in

February

Average price

£469

Good round-trip deal

£439 or less

Good one-way deal

£461 or less
Icelandair
  • Icelandair
  • 24/2-8/3
  • 2 total stops
  • 41h 15m total
  • United Kingdom to Seattle
Search Deals
10/3
  • 10/3
  • 3 total stops
  • 53h 28m total
  • United Kingdom to Seattle
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£57 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 January 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 28 January 2026.
Use the filters below to find and compare flights from the United Kingdom to Seattle that are best for you.

Fly from

United Kingdom

Fly to

Seattle

Route

Depart

Return

Price

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

Tue 21/4

13:05-20:40

1 stop15h 35m

Seattle/Tacoma Intl

Tue 28/4

15:40-11:40

1 stop12h 00m

£315

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

Wed 22/4

13:05-17:55

1 stop12h 50m

Seattle/Tacoma Intl

Sat 25/4

15:40-11:40

1 stop12h 00m

£332

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

Wed 22/4

13:05-17:55

1 stop12h 50m

Seattle/Tacoma Intl

Sun 26/4

15:40-11:40

1 stop12h 00m

£332

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

Tue 21/4

13:05-20:40

1 stop15h 35m

Seattle/Tacoma Intl

Fri 24/4

15:40-11:40

1 stop12h 00m

£333

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

Fri 17/4

13:05-20:40

1 stop15h 35m

Seattle/Tacoma Intl

Tue 28/4

15:40-11:40

1 stop12h 00m

£339

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

Fri 17/4

13:05-20:40

1 stop15h 35m

Seattle/Tacoma Intl

Fri 24/4

15:40-11:40

1 stop12h 00m

£357

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 10/2

14:55-16:55

Nonstop10h 00m

Seattle/Tacoma Intl

Wed 25/2

18:50-12:20

Nonstop9h 30m

£365

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 13/3

06:35-14:20

1 stop14h 45m

Seattle/Tacoma Intl

Fri 20/3

12:25-09:10

1 stop13h 45m

£367

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 18/3

06:35-14:20

1 stop14h 45m

Seattle/Tacoma Intl

Sun 22/3

23:59-21:20

1 stop14h 21m

£368

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 11/2

06:35-13:20

1 stop14h 45m

Seattle/Tacoma Intl

Wed 18/2

23:35-21:20

1 stop13h 45m

£368

Flights are sorted by cheapest return flights first.

Deals found on 27/1

Showing 1-10 of 60 results
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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, March is the cheapest month in which you can book a flight from United Kingdom to Seattle (average of £296). Flying from United Kingdom to Seattle in August is currently the most expensive (average of £449). 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 28 January 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 28 January 2026.

The most flights from GB0 to SEA 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 (6 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 124 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 Wednesday 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 4% 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 28 January 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
1,443 reviews
Check prices

Boarding

7.8

Crew

8.4

Food

7.3

Comfort

7.6

Overall

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,443 reviews
KLM
7.7
Good
1,443 reviews
Check prices

Boarding

7.8

Crew

8.4

Food

7.3

Comfort

7.6

Overall

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Virgin Atlantic
7.5
Good
678 reviews
KLM
7.7
Good
1,443 reviews
Check prices

Boarding

7.8

Crew

8.4

Food

7.3

Comfort

7.6

Overall

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Air France
7.4
Good
1,528 reviews
KLM
7.7
Good
1,443 reviews
Check prices

Boarding

7.8

Crew

8.4

Food

7.3

Comfort

7.6

Overall

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Icelandair
7.1
Good
603 reviews
KLM
7.7
Good
1,443 reviews
Check prices

Boarding

7.8

Crew

8.4

Food

7.3

Comfort

7.6

Overall

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
British Airways
6.7
Okay
7,704 reviews
KLM
7.7
Good
1,443 reviews
Check prices

Boarding

7.8

Crew

8.4

Food

7.3

Comfort

7.6

Overall

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

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 10h. Icelandair provides one of the quickest options available for as low as £365. Airlines will cover a distance of 4783 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 WestJet. According to our data, you can fly for as low as £323. Users have also found prices from £336 and £338 on British Airways and Virgin Atlantic, 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 (89%), Air France (89%) and Delta (89%).

  • 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 £1,624, our data indicates the cheapest price to be £389. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around £328.

  • 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, March is the cheapest month in which you can book a flight from United Kingdom to Seattle (average of £296). Flying from United Kingdom to Seattle in August is currently the most expensive (average of £449). 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

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Alternative routes for United Kingdom to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Edinburgh to Pasco flights
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Grimsby to Portland flights
Heathrow to Bellingham flights
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Munich to Seattle flights
Madrid to Seattle flights
Arlanda to Seattle flights

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 28 January 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£328Average£555FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£335Average£530FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£354Average£565FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£408Average£751FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Air CanadaCheapest£411Average£487FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Virgin AtlanticCheapest£417Average£653FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
United AirlinesCheapest£421Average£615FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
KLMCheapest£424Average£595FlexibilityNo cancel feeOn-time75%
Search KLM flights
FinnairCheapest£427Average£583FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IberiaCheapest£429Average£609FlexibilityNo cancel feeOn-time77%
Search Iberia 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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