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£377+ Cheap flights to Seattle

— SEA
10 Oct — 17 Oct1
1 adult
1 adult, Economy, 0 bags

Flights to Seattle in 2026

Enter your travel dates to find the best prices.

Cheapest flights to Seattle

Thu 17/908:30 -
2 stops18h 44m
Sat 3/1005:50 -
2 stops16h 40m
Deal found 9/9£442
Mon 26/1016:15 -
2 stops39h 21m
Sat 31/1014:26 -
1 stop34h 49m
Deal found 9/9£444
Fri 2/1008:25 -
1 stop16h 10m
Mon 5/1017:45 -
1 stop14h 55m
Deal found 9/9£445
Sat 17/1010:15 -
2 stops31h 50m
Sun 1/1110:10 -
2 stops15h 10m
Deal found 9/9£445
Sat 3/1011:25 -
2 stops20h 02m
Thu 8/1009:05 -
1 stop14h 20m
Deal found 9/9£446
Mon 23/1107:45 -
2 stops23h 15m
Wed 2/1214:35 -
1 stop18h 00m
Deal found 9/9£449
Thu 17/911:25 -
1 stop14h 17m
Sat 3/1022:48 -
1 stop14h 32m
Deal found 9/9£449
Thu 17/1208:40 -
2 stops21h 20m
Sat 9/106:05 -
2 stops23h 10m
Deal found 8/9£450
Mon 2/1112:35 -
1 stop15h 45m
Sat 7/1112:47 -
1 stop34h 03m
Deal found 9/9£450
Wed 23/910:25 -
1 stop15h 23m
Sun 27/913:30 -
1 stop11h 55m
Deal found 9/9£451
Fri 23/1009:30 -
2 stops17h 02m
Fri 30/1012:45 -
2 stops15h 35m
Deal found 8/9£451
Fri 6/1111:55 -
1 stop13h 05m
Tue 17/1114:35 -
1 stop12h 20m
Deal found 8/9£452

Find flight deals to Seattle

Return from

£442

One-way from

£377

Popular in

August

Cheapest in

February

Average price

£542

Good round-trip deal

£531 or less

Good one-way deal

£438 or less
Air Canada
  • Air Canada
  • 21/9-29/9
  • 4 total stops
  • 36h 01m total
  • London to Seattle
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1/10-31/12
  • 1/10-31/12
  • 3 total stops
  • 47h 30m total
  • London to Seattle
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Highest demand for flights based on searches. 6% potential increase in price (£36 potential increase over avg. return price).
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Cheapest flight prices on average. 1% potential price decrease (£8 potential savings vs. average return price).
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Average for return flights in September 2026
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Price to beat on a round-trip flight from London to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from London to Seattle/Tacoma Intl.
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Cheapflights Fare Finder

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

Fly from

Route

Depart

Return

Price

Cheapest return flight

LondonSeattle

LHR London Heathrow - SEA Seattle/Tacoma Intl

LHRSEA

London Heathrow

Sun 8/11

10:10-21:59

2 stops43h 49m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£382

LondonSeattle

LGW London Gatwick - SEA Seattle/Tacoma Intl

LGWSEA

London Gatwick

Tue 3/11

10:00-23:04

2 stops21h 04m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£382

LondonSeattle

LGW London Gatwick - SEA Seattle/Tacoma Intl

LGWSEA

London Gatwick

Mon 9/11

10:00-23:00

2 stops21h 00m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£382

LondonSeattle

LCY London City - SEA Seattle/Tacoma Intl

LCYSEA

London City

Mon 9/11

17:50-11:47

1 stop25h 57m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£383

LondonSeattle

LCY London City - SEA Seattle/Tacoma Intl

LCYSEA

London City

Tue 3/11

19:05-23:07

2 stops36h 02m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£384

LondonSeattle

LHR London Heathrow - SEA Seattle/Tacoma Intl

LHRSEA

London Heathrow

Mon 2/11

14:45-16:50

Nonstop10h 05m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£387

LondonSeattle

LHR London Heathrow - SEA Seattle/Tacoma Intl

LHRSEA

London Heathrow

Sun 1/11

12:20-14:50

Nonstop10h 30m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£387
Fastest return journey

LondonSeattle

LHR London Heathrow - SEA Seattle/Tacoma Intl

LHRSEA

London Heathrow

Tue 3/11

14:55-16:50

Nonstop9h 55m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£387

LondonSeattle

LHR London Heathrow - SEA Seattle/Tacoma Intl

LHRSEA

London Heathrow

Tue 15/12

12:20-14:50

Nonstop10h 30m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£387

LondonSeattle

LHR London Heathrow - SEA Seattle/Tacoma Intl

LHRSEA

London Heathrow

Fri 6/11

12:20-14:50

Nonstop10h 30m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£387

Flights are sorted by cheapest return flights first.

Deals found on 6/9

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight to Seattle

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

Cheapflights Insights

Everything you need to know about your flight to Seattle

How long is the flight to Seattle?

On average, a flight from London to Seattle takes 14 hours 15 minutes. Flights to Seattle from other popular cities in United Kingdom will vary in length. Below are a few examples of popular routes and their flight times.

Weekly flight availability to Seattle

The most flights from London to Seattle are scheduled on a Monday (24 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (18 on average).

What are the most popular airlines that fly to Seattle?

The most popular airlines flying from London to Seattle are Virgin Atlantic, British Airways and Alaska Airlines.

Virgin Atlantic
Virgin Atlantic
From £399
British Airways
British Airways
From £359
Icelandair
Icelandair
From £313
Alaska Airlines
Alaska Airlines
From £466

What are the cheapest airlines that fly to Seattle?

The cheapest airlines flying from London to Seattle are Lufthansa, Icelandair and United Airlines.

Rainfall in Seattle 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

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).

When is the best time to book a flight to Seattle?

The best time to book flights to Seattle is 80 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Seattle

Check out reviews from past customers who have flown Alaska Airlines,KLM, andVirgin Atlantic to the United States to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
12,904 reviews
Check prices

Overall

7.9

Comfort

7.8

Food

7.0

Crew

8.5

Boarding

8.1

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Alaska Airlines
7.9
Good
12,904 reviews
Alaska Airlines
7.9
Good
12,904 reviews
Check prices

Overall

7.9

Comfort

7.8

Food

7.0

Crew

8.5

Boarding

8.1

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
KLM
7.8
Good
1,576 reviews
Alaska Airlines
7.9
Good
12,904 reviews
Check prices

Overall

7.9

Comfort

7.8

Food

7.0

Crew

8.5

Boarding

8.1

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Virgin Atlantic
7.4
Good
694 reviews
Alaska Airlines
7.9
Good
12,904 reviews
Check prices

Overall

7.9

Comfort

7.8

Food

7.0

Crew

8.5

Boarding

8.1

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Icelandair
6.9
Okay
741 reviews
Alaska Airlines
7.9
Good
12,904 reviews
Check prices

Overall

7.9

Comfort

7.8

Food

7.0

Crew

8.5

Boarding

8.1

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
British Airways
6.7
Okay
8,209 reviews
Alaska Airlines
7.9
Good
12,904 reviews
Check prices

Overall

7.9

Comfort

7.8

Food

7.0

Crew

8.5

Boarding

8.1

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.

FAQs about flying to Seattle

Getting around Seattle

The Metro Transit system of buses, including electric and hybrid buses, is useful and tourist-friendly, though drivers do not carry change. Express routes are offered by some buses. Other options include the streetcar and the monorail, connecting with major attractions. The Washington State Ferries are a tourist attraction in their own right.

Seattle is generally safe, though common sense should be applied at all times and it can be best to avoid parks at night.

Getting downtown:

Flights to Seattle will take you to Seattle-Tacoma International Airport (SEA), also known as Sea-Tac, it is the city’s major airport. It is 10 miles (16 km) from the city centre. There are several options for getting into the city. The Link Light Rail is a convenient choice, taking just over 30 minutes to reach the centre. Shuttle buses are useful for those with a lot of luggage. There are also taxis and rental cars.

Seattle airport overview

Seattle-Tacoma International Airport, also affectionately known as Sea-Tac Airport, is located in the southern King County of Washington, 19km (12 miles) south of Seattle. Serving more than 31.5 million passengers in 2010, it is the United States’ 18th busiest airport.

Sea-Tac Airport has a Main (central) Terminal and ticketing arena surrounded by concourses A-D, as well as a two satellite terminals called the North and South Satellites. An automatic people-mover transports passengers between the satellite terminals and the Main Terminal. Running alongside the ticketing concourse is the airport garage, which houses five parking areas and a ground transportation centre. All gates may be accessed once past security.

With an extensive selection of art on display throughout the airport, in addition to a host of shops, restaurants, bars, bistros and fast-food outlets, Sea-Tac is both attractive and inviting. Moreover, its combination of efficient facilities and helpful staff make pesky tasks such as checking-in a breeze.

Flights to Seattle-Tacoma International Airport comes from a number of cities worldwide, including Toronto, Paris, Atlanta, Los Angeles, Chicago, Seoul, London, Frankfurt, Amsterdam, Tokyo, New York, Honolulu and Beijing.

  • What airport do you fly into for flights to Seattle?

    For a flight 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. Booking flights from London to Seattle/Tacoma Intl should be relatively easy as there are 23 daily flights from 12 different airlines.

  • Can I find cheaper flights to Seattle if I am willing to have stopovers?

    Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to Seattle on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to Seattle?

    Based on reviews from Cheapflights users, Lufthansa is rated the highest out of the airlines that fly to Seattle.

  • What is the cheapest airport to fly to in Seattle?

    Seattle/Tacoma Intl is currently the cheapest airport to fly to in Seattle. One-way flights to Seattle/Tacoma Intl typically cost £39, while return flights cost around £143.

  • How much is a return flight to Seattle?

    A return flight to Seattle will typically cost around £382, however they can be found for as little as £143.

  • Where does the fastest flight to Seattle depart from?

    For those looking to save time traveling to Seattle, London offers the quickest one-way flight (9 hours 45 minutes).

  • Does Seattle/Tacoma Intl have car hire?

    Yes. Those touching down at Seattle/Tacoma Intl can take advantage of the car hire services offered upon their arrival.

  • Are there hotels close to Seattle/Tacoma Intl?

    Yes. Seattle/Tacoma Intl has hotels nearby for those requiring accommodations. Serene 3-bedroom house perfect for relaxing stays in SeaTac, Burien, Seattle is the closest property to Seattle/Tacoma Intl (0.0 mi away from Seattle/Tacoma Intl).

See more FAQs

Travelling to a place near Seattle?

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

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