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Cheapest flights to Seattle
Explore the most affordable flight options available to Seattle. Find the lowest fares based on data from user searches, with prices last updated on 29 June 2026.

Thu 1/1009:50

LHR

-

SEA

Nonstop9h 45m

British Airways

Thu 8/1013:30

SEA

-

LHR

Nonstop9h 15m

British Airways

Deal found 25/6£470

Thu 1/1009:50

LHR

-

SEA

Nonstop9h 45m

Finnair

Thu 8/1013:30

SEA

-

LHR

Nonstop9h 15m

Finnair

Deal found 25/6£475

Fri 11/909:50

LHR

-

SEA

Nonstop9h 45m

British Airways

Sat 26/920:20

SEA

-

LHR

Nonstop9h 25m

British Airways

Deal found 25/6£476

Wed 30/909:50

LHR

-

SEA

Nonstop9h 45m

Finnair

Mon 9/1118:50

SEA

-

LHR

Nonstop9h 30m

Finnair

Deal found 24/6£478

Tue 27/1014:55

LHR

-

SEA

Nonstop10h 00m

British Airways

Sun 8/1118:50

SEA

-

LHR

Nonstop9h 30m

British Airways

Deal found 25/6£479

Sat 24/1009:50

LHR

-

SEA

Nonstop9h 45m

British Airways

Mon 2/1118:50

SEA

-

LHR

Nonstop9h 30m

British Airways

Deal found 24/6£480

Thu 10/1209:25

LHR

-

SEA

Nonstop10h 05m

Iberia

Mon 14/1218:50

SEA

-

LHR

Nonstop9h 30m

Iberia

Deal found 25/6£490

Mon 28/909:50

LHR

-

SEA

Nonstop9h 45m

British Airways

Sun 11/1013:30

SEA

-

LHR

Nonstop9h 15m

British Airways

Deal found 25/6£495

Thu 1/1009:50

LHR

-

SEA

Nonstop9h 45m

British Airways

Sun 11/1013:30

SEA

-

LHR

Nonstop9h 15m

British Airways

Deal found 25/6£496

Wed 2/916:30

LHR

-

SEA

Nonstop9h 55m

British Airways

Sat 12/920:20

SEA

-

LHR

Nonstop9h 25m

British Airways

Deal found 24/6£497

Fri 21/817:45

LHR

-

SEA

Nonstop10h 18m

Virgin Atlantic

Sat 29/821:45

SEA

-

LHR

Nonstop9h 50m

Virgin Atlantic

Deal found 25/6£502

Sun 16/811:40

LHR

-

SEA

Nonstop10h 20m

Air France

Sat 29/821:45

SEA

-

LHR

Nonstop9h 50m

Air France

Deal found 24/6£504

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.

LON-SEA

LHR-SEA

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.

Fly from

Route

Depart

Return

Price

Cheapest return flight

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 28/9

11:40-14:00

Nonstop10h 20m

Seattle/Tacoma Intl

Mon 12/10

21:50-15:35

Nonstop9h 45m

£529

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 4/9

11:40-14:00

Nonstop10h 20m

Seattle/Tacoma Intl

Mon 7/9

18:20-12:10

Nonstop9h 50m

£535

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 22/9

17:45-20:10

Nonstop10h 25m

Seattle/Tacoma Intl

Mon 28/9

18:20-12:10

Nonstop9h 50m

£537

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 23/9

11:40-14:00

Nonstop10h 20m

Seattle/Tacoma Intl

Wed 30/9

18:20-12:10

Nonstop9h 50m

£548

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 22/9

11:40-14:00

Nonstop10h 20m

Seattle/Tacoma Intl

Tue 6/10

21:50-15:35

Nonstop9h 45m

£549

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 26/9

11:40-14:00

Nonstop10h 20m

Seattle/Tacoma Intl

Thu 1/10

20:10-14:00

Nonstop9h 50m

£558

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 17/10

11:40-14:00

Nonstop10h 20m

Seattle/Tacoma Intl

Fri 23/10

21:50-15:35

Nonstop9h 45m

£563

Fastest return journey

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 5/9

17:00-19:00

Nonstop10h 00m

Seattle/Tacoma Intl

Sat 12/9

21:40-15:05

Nonstop9h 25m

£565

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 26/10

14:45-17:50

Nonstop10h 05m

Seattle/Tacoma Intl

Sun 1/11

18:55-12:20

Nonstop9h 25m

£567

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 12/8

17:45-20:03

Nonstop10h 18m

Seattle/Tacoma Intl

Sun 23/8

21:45-15:35

Nonstop9h 50m

£569

Flights are sorted by cheapest return flights first.

Deals found on 29/6

Showing 1-10 of 23 resultsSorted by cheapest first

1

2

3

Reviews of airlines flying non-stop to 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

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

Alaska Airlines

7.9

Good

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.

7.8

Good

Alaska Airlines

7.9

Good

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

7.5

Good

Alaska Airlines

7.9

Good

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.

7.0

Good

Alaska Airlines

7.9

Good

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

Alaska Airlines

7.9

Good

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.

FAQ about direct flights to Seattle

How much are direct flights to Seattle?
On average, a one-way direct flight to Seattle will cost users approximately £1,511. If you're looking for a direct return flight to Seattle, you can expect to pay around £2,164.
Which airlines fly direct to Seattle?
At the moment, Virgin Atlantic, British Airways, KLM, Alaska Airlines, Air France, Aer Lingus, American Airlines, Finnair, Delta offer direct flights to Seattle. Virgin Atlantic is currently the most popular airline that flies direct to Seattle.
How long is a direct flight to Seattle?
While the flight duration depends heavily on the origin, travellers can expect non-stop flights to Seattle to last approximately 9h 45m on average. The quickest direct flight to Seattle at this time departs from London Heathrow Airport (9h 45m), while the longest leaves from London Heathrow Airport (9h 45m).
What is the best time of year to fly direct to Seattle?
If you're seeking the lowest price on a direct flight to Seattle, January is worth consideration, as prices are usually at their lowest, on average. January may be most appealing to users looking for the quietest time to visit Seattle, when demand is typically at its lowest.
What is the most popular direct flight origin to Seattle?
Currently, the most popular direct flight origin to Seattle is London Heathrow Airport. A return direct flight from London Heathrow Airport to Seattle typically costs around £1,838.

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