Direct flights to Seattle | Cheapflights

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Best

Last-minute

One-way

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 6 July 2026.

Fri 18/911:40

LHR

-

SEA

Nonstop10h 20m

Virgin Atlantic

Tue 13/1021:50

SEA

-

LHR

Nonstop9h 45m

Virgin Atlantic

Deal found 2/7£510

Sun 4/1011:40

LHR

-

SEA

Nonstop10h 20m

Air France

Sun 11/1021:50

SEA

-

LHR

Nonstop9h 45m

Air France

Deal found 2/7£519

Tue 15/917:45

LHR

-

SEA

Nonstop10h 25m

KLM

Thu 15/1021:50

SEA

-

LHR

Nonstop9h 45m

KLM

Deal found 2/7£520

Wed 7/1011:40

LHR

-

SEA

Nonstop10h 20m

Virgin Atlantic

Sat 7/1116:48

SEA

-

LHR

Nonstop9h 42m

Virgin Atlantic

Deal found 1/7£522

Sat 26/911:40

LHR

-

SEA

Nonstop10h 20m

Air France

Thu 22/1020:10

SEA

-

LHR

Nonstop9h 50m

Air France

Deal found 1/7£525

Wed 23/911:40

LHR

-

SEA

Nonstop10h 20m

KLM

Wed 7/1018:20

SEA

-

LHR

Nonstop9h 50m

KLM

Deal found 3/7£525

Sat 26/911:40

LHR

-

SEA

Nonstop10h 20m

Virgin Atlantic

Sun 4/1021:50

SEA

-

LHR

Nonstop9h 45m

Virgin Atlantic

Deal found 1/7£526

Sat 19/911:40

LHR

-

SEA

Nonstop10h 20m

Virgin Atlantic

Sat 26/921:50

SEA

-

LHR

Nonstop9h 45m

Virgin Atlantic

Deal found 1/7£527

Fri 23/1009:50

LHR

-

SEA

Nonstop9h 45m

British Airways

Sat 31/1019:50

SEA

-

LHR

Nonstop9h 30m

British Airways

Deal found 3/7£528

Sat 5/917:45

LHR

-

SEA

Nonstop10h 25m

Virgin Atlantic

Fri 18/918:20

SEA

-

LHR

Nonstop9h 50m

Virgin Atlantic

Deal found 1/7£528

Thu 3/917:45

LHR

-

SEA

Nonstop10h 25m

Virgin Atlantic

Tue 8/918:20

SEA

-

LHR

Nonstop9h 50m

Virgin Atlantic

Deal found 1/7£529

Fri 4/917:45

LHR

-

SEA

Nonstop10h 25m

Virgin Atlantic

Thu 10/921:50

SEA

-

LHR

Nonstop9h 45m

Virgin Atlantic

Deal found 1/7£530

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

Thu 3/9

17:00-19:00

Nonstop10h 00m

Seattle/Tacoma Intl

Thu 17/9

21:40-15:05

Nonstop9h 25m

£565

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 1/9

17:00-19:00

Nonstop10h 00m

Seattle/Tacoma Intl

Thu 17/9

21:40-15:05

Nonstop9h 25m

£579

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 20/8

09:50-11:35

Nonstop9h 45m

Seattle/Tacoma Intl

Sat 5/9

20:20-13:45

Nonstop9h 25m

£582

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 20/8

17:45-20:03

Nonstop10h 18m

Seattle/Tacoma Intl

Sat 5/9

21:50-15:35

Nonstop9h 45m

£585

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 20/8

17:45-20:03

Nonstop10h 18m

Seattle/Tacoma Intl

Sat 5/9

21:50-15:35

Nonstop9h 45m

£585

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 20/8

16:30-18:25

Nonstop9h 55m

Seattle/Tacoma Intl

Sat 5/9

20:20-13:45

Nonstop9h 25m

£593

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 16/12

12:20-14:45

Nonstop10h 25m

Seattle/Tacoma Intl

Wed 30/12

16:48-10:30

Nonstop9h 42m

£595

Fastest return journey

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 25/8

09:50-11:35

Nonstop9h 45m

Seattle/Tacoma Intl

Mon 7/9

13:30-06:45

Nonstop9h 15m

£597

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sun 16/8

09:50-11:35

Nonstop9h 45m

Seattle/Tacoma Intl

Sun 23/8

20:20-13:45

Nonstop9h 25m

£602

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 13/8

17:45-20:03

Nonstop10h 18m

Seattle/Tacoma Intl

Tue 25/8

21:45-15:35

Nonstop9h 50m

£613

Flights are sorted by cheapest return flights first.

Deals found on 1/7

Showing 1-10 of 22 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 £1,911. If you're looking for a direct return flight to Seattle, you can expect to pay around £1,736.
Which airlines fly direct to Seattle?
At the moment, Virgin Atlantic, British Airways, Alaska Airlines, KLM, 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 £1,806.

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