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Cheap flights from the United Kingdom to Seattle from £234

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 15/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
27 Apr — 4 May1
1 adult

Cheap 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 22 April 2025.

Round-trip from

£452

One-way from

£234

Popular in

August

Cheapest in

January

Average price

£530

Good round-trip deal

£546 or less

Good one-way deal

£623 or less
Air Canada
  • Air Canada
  • 8/5-11/5
  • 4 total stops
  • 35h 57m total
  • United Kingdom to Seattle
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15/5
  • 15/5
  • 2 total stops
  • 56h 17m total
  • United Kingdom to Seattle
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£83 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£14 potential savings vs. average return price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from United Kingdom to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from United Kingdom to Seattle/Tacoma Intl.
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Find flight deals from United Kingdom to Seattle

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 22 April 2025.

Thu 8/506:30LHR - SEA
1 stop13h 55mLufthansa
Sun 11/523:59SEA - LHR
1 stop23h 41mLufthansa
Deal found 22/4£452
Wed 30/409:15LHR - SEA
2 stops21h 34mFinnair
Wed 7/522:59SEA - LHR
2 stops26h 46mFinnair
Deal found 22/4£453
Tue 4/1111:55LGW - SEA
1 stop13h 05mIcelandair
Tue 11/1114:35SEA - LGW
1 stop12h 20mIcelandair
Deal found 22/4£454
Mon 28/406:30LHR - SEA
2 stops19h 58mMultiple Airlines
Tue 13/507:20SEA - LHR
1 stop15h 10mMultiple Airlines
Deal found 21/4£454
Mon 8/907:40LHR - SEA
1 stop17h 19mBritish Airways
Tue 23/913:30SEA - LHR
Nonstop9h 20mBritish Airways
Deal found 21/4£454
Mon 28/421:25LHR - SEA
1 stop31h 15mIcelandair
Tue 13/515:45SEA - LHR
1 stop20h 35mIcelandair
Deal found 21/4£455
Wed 10/908:40LHR - SEA
2 stops18h 51mAir Canada
Thu 18/910:00SEA - LHR
2 stops15h 35mAir Canada
Deal found 22/4£457
Mon 5/513:25LHR - SEA
Nonstop10h 20mVirgin Atlantic
Tue 20/517:35SEA - LHR
Nonstop9h 45mVirgin Atlantic
Deal found 21/4£457
Mon 12/520:05LHR - SEA
2 stops30h 28mSWISS
Mon 19/514:40SEA - LHR
2 stops20h 40mSWISS
Deal found 21/4£464
Wed 7/507:25LHR - SEA
1 stop17h 34mUnited Airlines
Fri 23/505:10SEA - LHR
1 stop21h 15mUnited Airlines
Deal found 22/4£465
Sun 4/520:55LHR - SEA
1 stop22h 45mKLM
Wed 14/517:35SEA - LHR
Nonstop9h 45mKLM
Deal found 21/4£467
Mon 28/415:05LGW - SEA
2 stops27h 53mMultiple Airlines
Tue 13/522:40SEA - LGW
1 stop25h 30mMultiple Airlines
Deal found 21/4£477

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 22 April 2025.
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

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 8/5

08:40-19:37

2 stops18h 57m

Seattle/Tacoma Intl

Sun 11/5

05:30-06:30

2 stops17h 00m

£452

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 11/9

06:30-11:55

1 stop13h 25m

Seattle/Tacoma Intl

Thu 25/9

19:15-06:30

2 stops27h 15m

£453

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 21/8

13:05-20:40

1 stop15h 35m

Seattle/Tacoma Intl

Thu 11/9

23:30-20:20

1 stop12h 50m

£454

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 8/9

07:40-16:59

1 stop17h 19m

Seattle/Tacoma Intl

Tue 23/9

13:30-06:50

Nonstop9h 20m

£454

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 8/9

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Mon 22/9

19:00-14:35

1 stop11h 35m

£454

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 1/9

12:15-00:28

2 stops20h 13m

Seattle/Tacoma Intl

Sun 21/9

23:55-06:15

2 stops22h 20m

£456

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 5/5

13:25-15:45

Nonstop10h 20m

Seattle/Tacoma Intl

Tue 20/5

17:35-11:20

Nonstop9h 45m

£457

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 10/9

07:25-16:59

1 stop17h 34m

Seattle/Tacoma Intl

Tue 23/9

10:00-11:50

2 stops17h 50m

£462

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 12/5

20:05-18:33

2 stops30h 28m

Seattle/Tacoma Intl

Mon 19/5

14:40-19:20

2 stops20h 40m

£464

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 7/5

10:50-16:59

1 stop14h 09m

Seattle/Tacoma Intl

Mon 19/5

07:00-07:25

1 stop16h 25m

£465

Flights are sorted by cheapest return flights first.

Deals found on 21/4

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, January is the cheapest month in which you can book a flight from United Kingdom to Seattle (average of £622). Flying from United Kingdom to Seattle in July is currently the most expensive (average of £946). 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 22 April 2025.

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 22 April 2025.

The most flights from GB0 to SEA are scheduled on a Tuesday (22 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (11 on average).

Rainfall in Seattle by month

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

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Temperature in Seattle by month

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

If weather is an important factor for your trip to Seattle, 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 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

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 22 April 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Finnair from United Kingdom to Seattle to help guide your decision. 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
7,920 reviews
Check prices

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very Good
7,920 reviews
Delta
8.0
Very Good
7,920 reviews
Check prices

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,331 reviews
Delta
8.0
Very Good
7,920 reviews
Check prices

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Finnair
7.6
Good
1,272 reviews
Delta
8.0
Very Good
7,920 reviews
Check prices

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Austrian Airlines
7.6
Good
780 reviews
Delta
8.0
Very Good
7,920 reviews
Check prices

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
SWISS
7.5
Good
1,582 reviews
Delta
8.0
Very Good
7,920 reviews
Check prices

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

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

    For one-way options, check prices for Aer Lingus. According to our data, you can fly for as low as £400. Users have also found prices from £400 and £451 on WestJet and Icelandair, 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 City - 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 Singapore Airlines (94%), Aeromexico (92%) and KLM (91%).

  • 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 £1,361, our data indicates the cheapest price to be £467. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around £359.

  • 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 £622). Flying from United Kingdom to Seattle in July is currently the most expensive (average of £946). 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 the United Kingdom?

Book flights to the United Kingdom if you plan to visit one of these locations
Tacoma
Leavenworth
Bothell

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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.
Heathrow to Seattle flights
Gatwick to Seattle flights
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London City to Portland flights
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Manchester to Portland flights
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Stansted to Portland flights
Luton to Portland flights
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Glasgow Intl to Portland flights
Heathrow to Bellingham flights
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London City to Spokane flights
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Birmingham to Spokane flights
Heathrow to Pasco flights
Birmingham to Portland flights
Manchester to Spokane flights
Southend to Seattle flights
Frankfurt to Seattle flights
Amsterdam to Seattle flights
Leeds to Portland flights
Madrid to Seattle flights
Oslo Gardermoen to Seattle flights
Newquay to Seattle flights
Munich to Seattle flights
Grimsby to Portland flights
Copenhagen to Seattle flights
Edinburgh to Pasco 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 22 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£8Average£806FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£326Average£560FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air FranceCheapest£387Average£612FlexibilityNo cancel feeOn-time77%
Search Air France flights
LufthansaCheapest£397Average£576FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£400Average£647FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
KLMCheapest£408Average£649FlexibilityNo cancel feeOn-time75%
Search KLM flights
FinnairCheapest£416Average£606FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest£432Average£682FlexibilityNo cancel feeOn-time70%
Search British Airways flights
DeltaCheapest£446Average£712FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Virgin AtlanticCheapest£452Average£617FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic 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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