How long is the flight from United Kingdom to Seattle?

A quick flight from United Kingdom to Seattle can take about 13h 05m. United Airlines provides one of the quickest options available for as low as £454. 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 Aer Lingus. According to our data, you can fly for as low as £384. Users have also found prices from £385 and £400 on British Airways and WestJet, respectively.

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.

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).

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 cheapest flights from United Kingdom to Seattle?

Looking for the cheapest flight from United Kingdom to Seattle? While on average our users pay £1,561, our data indicates the cheapest price to be £436. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around £376.

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 Scandinavian Airlines (95%), KLM (93%) and Air France (93%).

What are the most popular airlines that fly from United Kingdom to Seattle?

American Airlines, Air Canada and Air France are the most popular airlines when flying from United Kingdom to Seattle.

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.

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.

£271+ Flights from the United Kingdom to Seattle

Cheap flight deals from United Kingdom to Seattle

Round-trip from	£442
One-way from	£271
Popular in	July
Cheapest in	January
Average price	£496
Good round-trip deal	£511 or less
Good one-way deal	£575 or less

Icelandair
28/10-2/11
2 total stops
25h 25m total
United Kingdom to Seattle

Search Deals

10/12
2 total stops
33h 33m total
United Kingdom to Seattle

Search Deals

Highest demand for flights based on searches. 13% potential increase in price (£60 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 September 2025

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

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 16 September 2025.

Tue 28/1011:55LGW - SEA

1 stop13h 05mIcelandair

Sun 2/1114:35SEA - LGW

1 stop12h 20mIcelandair

Deal found 15/9£442

Mon 22/919:45LHR - SEA

1 stop23h 30mVirgin Atlantic

Mon 6/1017:35SEA - LHR

Nonstop9h 45mVirgin Atlantic

Deal found 14/9£442

Wed 8/1006:30LHR - SEA

2 stops15h 46mMultiple Airlines

Tue 14/1010:00SEA - LHR

2 stops15h 35mMultiple Airlines

Deal found 14/9£444

Wed 5/1112:15LHR - SEA

1 stop12h 45mIcelandair

Sun 15/315:35SEA - LHR

1 stop12h 15mIcelandair

Deal found 15/9£444

Wed 1/1008:20LHR - SEA

1 stop16h 33mFinnair

Sun 16/1100:59SEA - LHR

1 stop23h 16mFinnair

Deal found 14/9£445

Sun 16/1106:00LHR - SEA

2 stops25h 15mSWISS

Sat 29/1110:05SEA - LHR

2 stops16h 05mSWISS

Deal found 15/9£446

Sun 28/906:00LHR - SEA

2 stops23h 15mSWISS

Tue 14/1015:28SEA - LHR

2 stops18h 22mSWISS

Deal found 16/9£447

Mon 3/1117:20LGW - SEA

2 stops49h 15mMultiple Airlines

Sun 16/1121:34SEA - LGW

1 stop24h 26mMultiple Airlines

Deal found 15/9£447

Mon 29/913:25LHR - SEA

Nonstop10h 05mVirgin Atlantic

Mon 13/1005:25SEA - LHR

1 stop20h 25mVirgin Atlantic

Deal found 16/9£447

Fri 26/910:50LHR - SEA

1 stop14h 09mLufthansa

Mon 13/1013:12SEA - LHR

1 stop13h 28mLufthansa

Deal found 16/9£448

Thu 25/915:40LGW - SEA

1 stop13h 00mIcelandair

Sat 29/1114:35SEA - LGW

1 stop12h 20mIcelandair

Deal found 16/9£449

Mon 13/1006:30LHR - SEA

1 stop13h 25mMultiple Airlines

Mon 20/1014:55SEA - LHR

1 stop14h 25mMultiple Airlines

Deal found 15/9£449

Best flights from United Kingdom to Seattle
Discover carefully curated flight deals from United Kingdom to Seattle that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 16 September 2025.

Thu 6/1107:30LHR - SEA

2 stops18h 40mUnited Airlines

Thu 13/1119:13SEA - LHR

2 stops18h 07mUnited Airlines

Deal found 14/9£448

Mon 3/1111:55LGW - SEA

1 stop13h 05mIcelandair

Wed 1/419:00SEA - LGW

1 stop11h 40mIcelandair

Deal found 15/9£454

Mon 13/1006:30LHR - SEA

1 stop13h 25mLufthansa

Mon 20/1013:57SEA - LHR

1 stop13h 48mLufthansa

Deal found 15/9£455

Tue 18/1106:30LHR - SEA

1 stop13h 15mDelta

Tue 2/1216:50SEA - LHR

Nonstop9h 40mDelta

Deal found 16/9£459

Mon 29/906:30LHR - SEA

1 stop13h 15mMultiple Airlines

Mon 13/1020:25SEA - LHR

Nonstop9h 50mMultiple Airlines

Deal found 16/9£459

Mon 24/1115:45LHR - SEA

1 stop15h 54mBritish Airways

Tue 2/1211:34SEA - LHR

1 stop14h 26mBritish Airways

Deal found 16/9£460

Tue 2/1218:55LCY - SEA

1 stop24h 55mVirgin Atlantic

Wed 18/206:05SEA - LCY

2 stops18h 45mVirgin Atlantic

Deal found 14/9£492

Wed 15/1009:25LCY - SEA

2 stops17h 11mSWISS

Wed 29/1015:37SEA - LCY

2 stops18h 28mSWISS

Deal found 15/9£493

Tue 7/1013:20EDI - SEA

2 stops32h 40mScandinavian Airlines

Fri 10/1016:20SEA - EDI

2 stops34h 35mScandinavian Airlines

Deal found 15/9£517

Thu 5/310:20EDI - SEA

1 stop14h 35mAmerican Airlines

Mon 9/313:48SEA - EDI

2 stops20h 12mAmerican Airlines

Deal found 13/9£542

Sun 2/1111:55LGW - SEA

1 stop13h 05mIcelandair

Thu 2/419:00SEA - LGW

1 stop11h 40mIcelandair

Deal found 15/9£454

Sat 18/1006:30LHR - SEA

1 stop13h 25mUnited Airlines

Wed 22/1008:30SEA - LHR

2 stops18h 55mUnited Airlines

Deal found 14/9£455

Wed 8/1006:30LHR - SEA

1 stop17h 35mDelta

Tue 14/1017:35SEA - LHR

Nonstop9h 45mDelta

Deal found 14/9£459

Thu 30/1005:55STN - SEA

2 stops19h 05mMultiple Airlines

Thu 13/1114:35SEA - STN

2 stops21h 10mMultiple Airlines

Deal found 14/9£461

Thu 13/1118:15LCY - SEA

1 stop25h 55mLufthansa

Mon 17/1114:00SEA - LCY

1 stop18h 40mLufthansa

Deal found 14/9£471

Wed 8/1010:00LCY - SEA

1 stop14h 05mVirgin Atlantic

Wed 22/1007:50SEA - LCY

2 stops17h 00mVirgin Atlantic

Deal found 16/9£493

Sat 1/1111:55LGW - SEA

1 stop13h 05mIcelandair

Wed 11/315:35SEA - LGW

1 stop12h 20mIcelandair

Deal found 15/9£455

Wed 24/1206:30LHR - SEA

2 stops22h 37mUnited Airlines

Thu 22/112:35SEA - LHR

2 stops35h 20mUnited Airlines

Deal found 15/9£460

Mon 29/906:30LHR - SEA

2 stops16h 23mDelta

Tue 2/1211:35SEA - LHR

1 stop14h 40mDelta

Deal found 16/9£463

Tue 25/1111:55MAN - SEA

1 stop13h 00mBritish Airways

Tue 2/1214:46SEA - MAN

2 stops15h 14mBritish Airways

Deal found 14/9£518

Mon 19/113:00LGW - SEA

1 stop33h 49mMultiple Airlines

Sat 24/122:50SEA - LGW

1 stop23h 10mMultiple Airlines

Deal found 15/9£477

Thu 5/318:45MAN - SEA

2 stops34h 44mSWISS

Mon 9/314:47SEA - MAN

2 stops20h 08mSWISS

Deal found 13/9£540

Sun 2/1111:55LGW - SEA

1 stop13h 05mIcelandair

Mon 16/315:35SEA - LGW

1 stop12h 20mIcelandair

Deal found 15/9£455

Thu 5/306:35BHD - SEA

1 stop18h 20mAmerican Airlines

Mon 9/313:48SEA - BHD

2 stops17h 27mAmerican Airlines

Deal found 13/9£552

Mon 3/1120:05LCY - SEA

1 stop23h 40mVirgin Atlantic

Sat 14/316:00SEA - LCY

1 stop18h 20mVirgin Atlantic

Deal found 14/9£519

Mon 29/913:25LHR - SEA

Nonstop10h 05mDelta

Tue 14/1017:35SEA - LHR

Nonstop9h 45mDelta

Deal found 16/9£473

Sun 19/1006:30LHR - SEA

2 stops15h 46mUnited Airlines

Mon 27/1013:20SEA - LHR

2 stops17h 10mUnited Airlines

Deal found 14/9£478

Tue 24/213:00LGW - SEA

1 stop33h 49mMultiple Airlines

Tue 3/310:55SEA - LGW

1 stop35h 05mMultiple Airlines

Deal found 14/9£479

Fri 7/1106:05EDI - SEA

1 stop13h 25mBritish Airways

Wed 12/1118:50SEA - EDI

1 stop14h 45mBritish Airways

Deal found 16/9£542

Tue 4/1111:55LGW - SEA

1 stop13h 05mIcelandair

Tue 17/315:35SEA - LGW

1 stop12h 20mIcelandair

Deal found 15/9£455

Direct flights from United Kingdom to Seattle
Explore direct flight options from United Kingdom to Seattle based on user searches, and compare prices and availability for your desired travel dates. Data last updated 16 September 2025.

Tue 24/214:45LHR - SEA

Nonstop10h 05mVirgin Atlantic

Tue 3/319:20SEA - LHR

Nonstop9h 30mVirgin Atlantic

Deal found 14/9£443

Mon 6/1013:25LHR - SEA

Nonstop10h 05mVirgin Atlantic

Tue 21/1020:25SEA - LHR

Nonstop9h 50mVirgin Atlantic

Deal found 14/9£444

Mon 17/1112:20LHR - SEA

Nonstop10h 28mVirgin Atlantic

Wed 26/1116:48SEA - LHR

Nonstop9h 42mVirgin Atlantic

Deal found 16/9£444

Mon 29/913:25LHR - SEA

Nonstop10h 05mVirgin Atlantic

Mon 13/1017:35SEA - LHR

Nonstop9h 45mVirgin Atlantic

Deal found 15/9£448

Tue 10/309:25LHR - SEA

Nonstop10h 05mBritish Airways

Tue 17/314:25SEA - LHR

Nonstop9h 35mBritish Airways

Deal found 15/9£450

Wed 8/1017:25LHR - SEA

Nonstop10h 25mVirgin Atlantic

Tue 14/1017:35SEA - LHR

Nonstop9h 45mVirgin Atlantic

Deal found 14/9£453

Tue 2/1214:55LHR - SEA

Nonstop10h 00mBritish Airways

Wed 18/218:50SEA - LHR

Nonstop9h 30mBritish Airways

Deal found 14/9£459

Mon 6/1013:25LHR - SEA

Nonstop10h 05mVirgin Atlantic

Mon 20/1017:35SEA - LHR

Nonstop9h 45mVirgin Atlantic

Deal found 15/9£460

Last-minute flights from United Kingdom to Seattle
Discover last-minute flight deals from United Kingdom to Seattle. Data last updated 16 September 2025 and is based on user searches.

Mon 22/919:45LHR - SEA

1 stop23h 30mVirgin Atlantic

Mon 6/1017:35SEA - LHR

Nonstop9h 45mVirgin Atlantic

Deal found 14/9£442

Mon 22/906:00LHR - SEA

2 stops22h 42mAustrian Airlines

Mon 6/1008:00SEA - LHR

1 stop14h 55mAustrian Airlines

Deal found 15/9£446

Thu 25/915:40LGW - SEA

1 stop13h 00mIcelandair

Sat 29/1114:35SEA - LGW

1 stop12h 20mIcelandair

Deal found 16/9£449

Fri 26/910:50LHR - SEA

1 stop14h 09mLufthansa

Sun 12/1013:57SEA - LHR

1 stop13h 48mLufthansa

Deal found 16/9£448

Sun 28/906:00LHR - SEA

2 stops23h 15mSWISS

Fri 5/1213:05SEA - LHR

2 stops20h 45mSWISS

Deal found 16/9£447

Mon 29/914:50LHR - SEA

1 stop16h 39mUnited Airlines

Mon 13/1008:00SEA - LHR

1 stop14h 55mUnited Airlines

Deal found 15/9£444

Mon 29/913:25LHR - SEA

Nonstop10h 05mVirgin Atlantic

Mon 13/1005:25SEA - LHR

1 stop20h 25mVirgin Atlantic

Deal found 16/9£447

Wed 1/1008:20LHR - SEA

1 stop16h 33mFinnair

Sun 16/1100:59SEA - LHR

1 stop23h 16mFinnair

Deal found 14/9£445

Wed 8/1006:30LHR - SEA

2 stops15h 46mMultiple Airlines

Tue 14/1010:00SEA - LHR

2 stops15h 35mMultiple Airlines

Deal found 14/9£444

Mon 13/1006:30LHR - SEA

1 stop13h 25mMultiple Airlines

Mon 20/1014:55SEA - LHR

1 stop14h 25mMultiple Airlines

Deal found 15/9£449

Wed 15/1008:40LHR - SEA

2 stops17h 56mAir Canada

Wed 22/1014:55SEA - LHR

1 stop14h 25mAir Canada

Deal found 15/9£449

Tue 28/1011:55LGW - SEA

1 stop13h 05mIcelandair

Sun 2/1114:35SEA - LGW

1 stop12h 20mIcelandair

Deal found 15/9£442

One-way flights from United Kingdom to Seattle
Search for one-way flight options from United Kingdom to Seattle. Find affordable one-way fares based on user searches. Data last updated 16 September 2025.

Wed 10/1208:55GLA - SEA

2 stops33h 33mMultiple Airlines

Deal found 14/9£271

Fri 3/1007:55GLA - SEA

3 stops42h 32mMultiple Airlines

Deal found 14/9£291

Sat 4/1023:50GLA - SEA

3 stops39h 50mMultiple Airlines

Deal found 14/9£301

Wed 29/1019:35MAN - SEA

3 stops53h 57mMultiple Airlines

Deal found 15/9£308

Wed 15/1020:10MAN - SEA

2 stops46h 39mMultiple Airlines

Deal found 15/9£309

Mon 13/1013:35MAN - SEA

3 stops53h 02mMultiple Airlines

Deal found 14/9£312

Sun 12/1016:55MAN - SEA

2 stops49h 34mMultiple Airlines

Deal found 14/9£328

Fri 9/108:50GLA - SEA

2 stops33h 29mMultiple Airlines

Deal found 14/9£338

Thu 30/1015:20MAN - SEA

3 stops48h 19mMultiple Airlines

Deal found 15/9£339

Tue 28/1015:50MAN - SEA

3 stops49h 30mMultiple Airlines

Deal found 15/9£341

Mon 16/212:30MAN - SEA

2 stops32h 53mMultiple Airlines

Deal found 15/9£342

Tue 14/1016:05MAN - SEA

3 stops35h 26mMultiple Airlines

Deal found 14/9£350

Cheapflights Fare Finder

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

LHR - SEA

LHRSEA

London Heathrow

Thu 6/11

07:30-18:10

2 stops18h 40m

Seattle/Tacoma Intl

Thu 13/11

19:13-21:20

2 stops18h 07m

£448

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 3/11

11:55-17:00

1 stop13h 05m

Seattle/Tacoma Intl

Wed 1/4

19:00-14:40

1 stop11h 40m

£454

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sun 2/11

11:55-17:00

1 stop13h 05m

Seattle/Tacoma Intl

Thu 2/4

19:00-14:40

1 stop11h 40m

£454

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 13/10

06:30-11:55

1 stop13h 25m

Seattle/Tacoma Intl

Mon 20/10

13:57-11:45

1 stop13h 48m

£455

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 18/10

06:30-11:55

1 stop13h 25m

Seattle/Tacoma Intl

Wed 22/10

08:30-11:25

2 stops18h 55m

£455

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 1/11

11:55-18:00

1 stop13h 05m

Seattle/Tacoma Intl

Wed 11/3

15:35-10:55

1 stop12h 20m

£455

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sun 2/11

11:55-17:00

1 stop13h 05m

Seattle/Tacoma Intl

Mon 16/3

15:35-10:55

1 stop12h 20m

£455

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Tue 4/11

11:55-17:00

1 stop13h 05m

Seattle/Tacoma Intl

Tue 17/3

15:35-10:55

1 stop12h 20m

£455

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 18/11

06:30-11:45

1 stop13h 15m

Seattle/Tacoma Intl

Tue 2/12

16:50-10:30

Nonstop9h 40m

£459

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 29/9

06:30-11:45

1 stop13h 15m

Seattle/Tacoma Intl

Mon 13/10

20:25-14:15

Nonstop9h 50m

£459

Flights are sorted by cheapest return flights first.

Deals found on 14/9

Showing 1-10 of 60 results

...

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?

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

The most flights from GB0 to SEA are scheduled on a Monday (21 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (10 on average).

Reviews of airlines servicing Seattle

Read reviews from past customers who have flown with KLM, Air France, andVirgin Atlantic 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

7.8

Good

1,386 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

KLM

7.8

Good

1,386 reviews

KLM

7.8

Good

1,386 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

Air France

7.4

Good

1,468 reviews

KLM

7.8

Good

1,386 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

Virgin Atlantic

7.4

Good

664 reviews

KLM

7.8

Good

1,386 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

Icelandair

7.0

Good

544 reviews

KLM

7.8

Good

1,386 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

British Airways

6.7

Okay

7,363 reviews

KLM

7.8

Good

1,386 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

Related info for your journey

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 05m. United Airlines provides one of the quickest options available for as low as £454. 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 Aer Lingus. According to our data, you can fly for as low as £384. Users have also found prices from £385 and £400 on British Airways and WestJet, 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 Scandinavian Airlines (95%), KLM (93%) and Air France (93%).
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 £1,561, our data indicates the cheapest price to be £436. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around £376.
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

Tacoma

Leavenworth

Bothell

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

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£320	Average£547	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Air France	Cheapest£379	Average£653	FlexibilityNo cancel fee	On-time77%	Search Air France flights
Lufthansa	Cheapest£389	Average£572	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Finnair	Cheapest£390	Average£577	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
KLM	Cheapest£398	Average£602	FlexibilityNo cancel fee	On-time75%	Search KLM flights
United Airlines	Cheapest£399	Average£622	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Aer Lingus	Cheapest£400	Average£764	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
British Airways	Cheapest£421	Average£607	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Virgin Atlantic	Cheapest£432	Average£593	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Scandinavian Airlines	Cheapest£434	Average£628	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights

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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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Cheap flights from the United Kingdom to Seattle from £271

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 10/12. Fares are subject to change and may not be available on all flights or dates of travel.

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 16 September 2025.

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One-way from

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Find flight deals from United Kingdom to Seattle

Cheapest flights from United Kingdom to SeattleExplore 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 16 September 2025.

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 16 September 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from the United Kingdom to Seattle that are best for you.

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.

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?

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 16 September 2025.

Weekly flight availability from United Kingdom to Seattle

Reviews of airlines servicing Seattle

Read reviews from past customers who have flown with KLM, Air France, andVirgin Atlantic 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.

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?

How long is the flight from United Kingdom to Seattle?

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

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

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

What are the cheapest flights from United Kingdom to Seattle?

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

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

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

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

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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.

Top 10 airlines flying from United Kingdom to Seattle

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

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

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

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

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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 16 September 2025.