Find flights
Deals
Airlines
Travel Guide

£387+ Cheap flights to Seattle

— SEA
23 Oct — 30 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 24/1208:55 -
1 stop13h 00m
Fri 8/116:55 -
Nonstop9h 45m
Deal found 23/9£418
Wed 21/1008:40 -
2 stops17h 52m
Wed 28/1010:10 -
2 stops16h 10m
Deal found 23/9£418
Sat 17/1019:10 -
2 stops25h 10m
Sun 25/1015:15 -
1 stop13h 35m
Deal found 22/9£419
Tue 20/1015:40 -
1 stop13h 00m
Tue 27/1015:35 -
1 stop12h 20m
Deal found 22/9£420
Wed 30/910:15 -
2 stops16h 17m
Fri 16/1015:00 -
1 stop14h 20m
Deal found 22/9£420
Fri 25/1206:30 -
2 stops18h 58m
Thu 7/123:05 -
1 stop23h 45m
Deal found 23/9£421
Sun 22/1114:55 -
Nonstop9h 55m
Thu 3/1218:45 -
Nonstop9h 25m
Deal found 23/9£421
Mon 7/1208:55 -
1 stop14h 18m
Sat 16/116:55 -
Nonstop9h 45m
Deal found 21/9£422
Tue 27/1009:30 -
1 stop34h 30m
Sun 8/1105:05 -
1 stop20h 35m
Deal found 21/9£423
Mon 28/917:35 -
1 stop25h 40m
Tue 13/1013:30 -
1 stop16h 15m
Deal found 21/9£424
Thu 1/1017:00 -
1 stop26h 15m
Sat 17/1013:30 -
1 stop11h 50m
Deal found 23/9£425
Thu 26/1112:20 -
Nonstop10h 30m
Sat 5/1209:50 -
1 stop13h 55m
Deal found 22/9£425

Find flight deals to Seattle

Return from

£418

One-way from

£387

Popular in

August

Cheapest in

February

Average price

£550

Good round-trip deal

£436 or less

Good one-way deal

£493 or less
Air Canada
  • Air Canada
  • 21/10-28/10
  • 4 total stops
  • 34h 02m total
  • London to Seattle
Search Deals
Icelandair
  • Icelandair
  • 14/10-31/12
  • 1 total stop
  • 28h 30m total
  • London to Seattle
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£37 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£7 potential savings vs. average return price).
Search Deals
Average for return flights in September 2026
Search Deals
Price to beat on a round-trip flight from London to Seattle/Tacoma Intl.
Search Deals
Price to beat on a one-way flight from London to Seattle/Tacoma Intl.
Search Deals

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

LGW London Gatwick - SEA Seattle/Tacoma Intl

LGWSEA

London Gatwick

Tue 17/11

16:45-15:14

1 stop30h 29m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£389

LondonSeattle

LGW London Gatwick - SEA Seattle/Tacoma Intl

LGWSEA

London Gatwick

Tue 15/12

10:00-22:05

2 stops20h 05m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£389
Fastest return journey

LondonSeattle

LHR London Heathrow - SEA Seattle/Tacoma Intl

LHRSEA

London Heathrow

Wed 25/11

14:55-16:50

Nonstop9h 55m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£389

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

£389

LondonSeattle

LHR London Heathrow - SEA Seattle/Tacoma Intl

LHRSEA

London Heathrow

Thu 17/12

14:45-16:50

Nonstop10h 05m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£389

LondonSeattle

LGW London Gatwick - SEA Seattle/Tacoma Intl

LGWSEA

London Gatwick

Fri 4/12

10:00-22:05

2 stops20h 05m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£389

LondonSeattle

LHR London Heathrow - SEA Seattle/Tacoma Intl

LHRSEA

London Heathrow

Thu 26/11

19:30-22:31

2 stops35h 01m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£391

LondonSeattle

LHR London Heathrow - SEA Seattle/Tacoma Intl

LHRSEA

London Heathrow

Fri 19/3

06:30-22:26

2 stops22h 56m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£391

LondonSeattle

LHR London Heathrow - SEA Seattle/Tacoma Intl

LHRSEA

London Heathrow

Tue 12/1

06:50-21:56

3 stops23h 06m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£392

LondonSeattle

LGW London Gatwick - SEA Seattle/Tacoma Intl

LGWSEA

London Gatwick

Fri 12/2

10:00-22:02

2 stops20h 02m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£392

Flights are sorted by cheapest return flights first.

Deals found on 19/9

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

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 16 hours 36 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 (17 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 £400
British Airways
British Airways
From £364
Icelandair
Icelandair
From £315
Alaska Airlines
Alaska Airlines
From £423

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 73 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
12,960 reviews
Check prices

Crew

8.5

Boarding

8.1

Food

7.0

Overall

7.9

Comfort

7.8

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
12,960 reviews
Alaska Airlines
7.9
Good
12,960 reviews
Check prices

Crew

8.5

Boarding

8.1

Food

7.0

Overall

7.9

Comfort

7.8

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
1,575 reviews
Alaska Airlines
7.9
Good
12,960 reviews
Check prices

Crew

8.5

Boarding

8.1

Food

7.0

Overall

7.9

Comfort

7.8

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
12,960 reviews
Check prices

Crew

8.5

Boarding

8.1

Food

7.0

Overall

7.9

Comfort

7.8

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
749 reviews
Alaska Airlines
7.9
Good
12,960 reviews
Check prices

Crew

8.5

Boarding

8.1

Food

7.0

Overall

7.9

Comfort

7.8

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
8,226 reviews
Alaska Airlines
7.9
Good
12,960 reviews
Check prices

Crew

8.5

Boarding

8.1

Food

7.0

Overall

7.9

Comfort

7.8

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 22 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 £112, while return flights cost around £145.

  • How much is a return flight to Seattle?

    A return flight to Seattle will typically cost around £388, however they can be found for as little as £145.

  • 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 55 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

Browse thousands of different options on Cheapflights for your next trip

Fly with Cheapflights

How does Cheapflights help users find flights to Seattle?

Cheapflights makes it easy to find Seattle flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights to Seattle for you. Better yet — we are completely free to use.

Can Cheapflights find flights to Seattle with no change fees?

Yes! Cheapflights helps users easily find flights to Seattle with no change fees.

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

Yes, Cheapflights has a feature called Price Alerts, which notifies users when flight prices change. Track prices for your flight to Seattle today and book when you’re ready!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.