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Flights from London to Seattle

Airlines operating flights from London to Seattle

Choose from 13 airlines flying from London to Seattle, including Alaska Airlines, Icelandair and Virgin Atlantic. British Airways currently offers the cheapest ticket on this route.
Alaska Airlines logo Alaska Airlines
Icelandair logo Icelandair
Virgin Atlantic logo Virgin Atlantic
British Airways logo British Airways
Aer Lingus logo Aer Lingus
Condor Airlines logo Condor Airlines
Lufthansa logo Lufthansa
Wizz Air Malta logo Wizz Air Malta
Scandinavian Airlines logo Scandinavian Airlines
KLM logo KLM
WestJet logo WestJet
Delta Air Lines logo Delta Air Lines
Jet2.com logo Jet2.com
Airlines are determined based on actual purchased flight tickets from London to Seattle according to previous 12 months data from Trip.com.

Find the cheapest direct flight options from London to Seattle over the next three months. Book one-way tickets from £401 and round-trip tickets from £430.

      • Cheapest nonstop
        LHR 17:40
        10h 19m
        Direct
        SEA 19:59
        London - Seattle | Tue, Apr 21 | Delta Air Lines
        SEA 21:45
        9h 50m
        Direct
        LHR 15:35
        Seattle - London | Mon, Apr 27 | Delta Air Lines
        £430 £587
        27% off
        27% off
        £587 £430
      • LHR 11:40
        10h 20m
        Direct
        SEA 14:00
        London - Seattle | Tue, Apr 21 | Virgin Atlantic
        SEA 18:20
        9h 50m
        Direct
        LHR 12:10
        Seattle - London | Mon, Apr 27 | Virgin Atlantic
        £431 £587
        27% off
        27% off
        £587 £431
      • LGW 15:40
        13h
        1 stop
        SEA 20:40
        London - Seattle | Tue, Apr 21 | Icelandair
        SEA 15:40
        12h 5m
        1 stop
        LGW 11:45
        Seattle - London | Mon, Apr 27 | Icelandair
        £356 £587
        39% off
        39% off
        £587 £356
      • LHR 06:30
        13h 50m
        1 stop
        SEA 12:20
        London - Seattle | Tue, Apr 21 | Lufthansa
        SEA 07:00
        15h 45m
        1 stop
        LHR 06:45
        Seattle - London | Mon, Apr 27 | Austrian Airlines
        £415
        28% off
        £587 £415
      • LHR 20:55
        22h 50m
        1 stop
        SEA 11:45
        London - Seattle | Tue, Apr 21 | Virgin Atlantic
        SEA 18:20
        9h 50m
        Direct
        LHR 12:10
        Seattle - London | Mon, Apr 27 | Delta Air Lines
        £417
        28% off
        £587 £417
      • LHR 20:55
        22h 50m
        1 stop
        SEA 11:45
        London - Seattle | Tue, Apr 21 | Delta Air Lines
        SEA 11:59
        14h 21m
        1 stop
        LHR 10:20
        Seattle - London | Mon, Apr 27 | Delta Air Lines
        £419
        28% off
        £587 £419
      • LHR 15:05
        12h 13m
        1 stop
        SEA 19:18
        London - Seattle | Tue, Apr 21 | Air Canada
        SEA 15:40
        13h 40m
        1 stop
        LHR 13:20
        Seattle - London | Mon, Apr 27 | Air Canada
        £421
        28% off
        £587 £421
      • LHR 12:00
        13h 10m
        1 stop
        SEA 17:10
        London - Seattle | Tue, Apr 21 | British Airways
        SEA 13:29
        13h 1m
        1 stop
        LHR 10:30
        Seattle - London | Mon, Apr 27 | British Airways
        £429
        27% off
        £587 £429
      • LHR 06:30
        13h 15m
        1 stop
        SEA 11:45
        London - Seattle | Tue, Apr 21 | KLM
        SEA 21:45
        9h 50m
        Direct
        LHR 15:35
        Seattle - London | Mon, Apr 27 | Air France
        £430
        27% off
        £587 £430
      • LHR 15:05
        12h 13m
        1 stop
        SEA 19:18
        London - Seattle | Tue, Apr 21 | United Airlines
        SEA 15:40
        13h 40m
        1 stop
        LHR 13:20
        Seattle - London | Mon, Apr 27 | United Airlines
        £431
        27% off
        £587 £431
      • LGW 15:40
        13h
        1 stop
        SEA 20:40
        London - Seattle | Fri, Apr 24 | Icelandair
        SEA 19:00
        11h 40m
        1 stop
        LGW 14:40
        Seattle - London | Fri, May 1 | Icelandair
        £433
        26% off
        £587 £433
      • LHR 15:15
        16h 24m
        1 stop
        SEA 23:39
        London - Seattle | Tue, Apr 21 | Finnair
        SEA 10:14
        15h 51m
        1 stop
        LHR 10:05
        Seattle - London | Mon, Apr 27 | American Airlines
        £434
        26% off
        £587 £434
      • LON 13:00
        17h 25m
        1 stop
        SEA Invalid Date
        London - Seattle | Sun, Apr 19 | Normal Airline
        SEA 15:00
        6h
        Direct
        LON 16:00
        Seattle - London | Tue, Apr 21 | Normal Airline
        Find more flights
        Find more flights
      • Cheapest nonstop
        LHR 09:50
        9h 45m
        Direct
        SEA 11:35
        London - Seattle | Tue, May 12 | British Airways
        £401 £546
        27% off
        27% off
        £546 £401
      • LHR 16:30
        9h 55m
        Direct
        SEA 18:25
        London - Seattle | Mon, Apr 27 | Finnair
        £404 £546
        26% off
        26% off
        £546 £404
      • LGW 13:05
        29h 24m
        1 stop
        SEA 10:29
        London - Seattle | Sun, Apr 19 | Norse Atlantic Airways
        £280 £546
        49% off
        49% off
        £546 £280
      • LHR 14:10
        32h 9m
        1 stop
        SEA 14:19
        London - Seattle | Wed, Apr 22 | WestJet
        £329
        40% off
        £546 £329
      • LGW 13:00
        12h 55m
        1 stop
        SEA 17:55
        London - Seattle | Tue, May 12 | Icelandair
        £339
        38% off
        £546 £339
      • LHR 13:55
        32h 24m
        1 stop
        SEA 14:19
        London - Seattle | Mon, Apr 20 | WestJet
        £344
        37% off
        £546 £344
      • LHR 21:25
        31h 15m
        1 stop
        SEA 20:40
        London - Seattle | Sun, Apr 19 | Icelandair
        £350
        36% off
        £546 £350
      • LGW 15:40
        13h
        1 stop
        SEA 20:40
        London - Seattle | Wed, May 6 | Icelandair
        £352
        36% off
        £546 £352
      • LGW 15:40
        13h
        1 stop
        SEA 20:40
        London - Seattle | Sat, May 9 | Icelandair
        £367
        33% off
        £546 £367
      • LHR 18:10
        29h 50m
        1 stop
        SEA 16:00
        London - Seattle | Mon, Apr 27 | British Airways
        £371
        32% off
        £546 £371
      • LGW 13:05
        29h 19m
        1 stop
        SEA 10:24
        London - Seattle | Tue, Jun 9 | Norse Atlantic Airways
        £374
        32% off
        £546 £374
      • LGW 15:40
        13h
        1 stop
        SEA 20:40
        London - Seattle | Thu, May 7 | Icelandair
        £375
        31% off
        £546 £375
      • LON 13:00
        17h 25m
        1 stop
        SEA Invalid Date
        London - Seattle | Sun, Apr 19 | Normal Airline
        Find more flights
        Find more flights

Displayed flight fares from London to Seattle are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Flight details for London to Seattle

The distance between London and Seattle is 7,713.31km. It takes around 10 hours 4 minutes on average to fly from London to Seattle. Based on Trip.com's data, travel demand peaks in July. The off-season for travel is September.

Cheapest one-way flight price£280
Cheapest return ticket price£356
Off-season travel monthSeptember
Peak season for travelJuly
Flight distance7,713.31km
Average flight time10 hours 4 minutes
Popular airlineAlaska Airlines
Flight statistics for the London–Seattle route are based on aggregated booking data from Trip.com over the past 12 months.

Trip.com price insights on flights from London to Seattle

What is the cheapest month for one-way flights from London to Seattle?

The average one way ticket price paid by Trip.com users from London to Seattle in each month over the past 12 months.

Based on Trip.com data, the cheapest month to fly from London to Seattle is April, with an average price of £546. The most expensive month is usually September, with average prices reaching £1,063.

£1,063
£805
£546
£288
  • £546
    Apr
  • £668
    May
  • £595
    Jun
  • £749
    Jul
  • £711
    Aug
  • £1,063
    Sep
  • £714
    Oct
  • £757
    Nov
  • £592
    Dec
  • £755
    Jan
  • £649
    Feb
  • £631
    Mar

What is the cheapest month for return flights from London to Seattle?

Average price of return flights from London to Seattle purchased by Trip.com users by month over the past 12 months

Based on Trip.com's historical data, January is often the cheapest month for fly from London to Seattle, with an average price of £423. July is usually the most expensive period, with prices averaging as high as £802.

£802
£613
£423
£234
    Cheapest
  • £558
    Apr
  • £589
    May
  • £609
    Jun
  • £802
    Jul
  • £681
    Aug
  • £576
    Sep
  • £640
    Oct
  • £570
    Nov
  • £747
    Dec
  • £423
    Jan
  • £558
    Feb
  • £577
    Mar

During the Early May bank holiday, which day is cheapest to fly from London to Seattle?

Data is based on the lowest one-way price from London to Seattle during Early May bank holiday in the Trip.com database over the past three days.

Early May bank holiday is scheduled for May 4. The lowest flight fares from London to Seattle are available on May 3, starting from £416.

£722
£569
£416
£263
    Cheapest
  • £519
    30
    Apr
  • £722
    1
    May
  • £621
    2
  • £416
    3
  • £416
    4
  • £529
    5
  • £530
    6

Flight FAQs

  • Which airlines offer the cheapest flights from London (LON) to Seattle (SEA)?

    Based on Trip.com data, Norse Atlantic Airways offers one-way fares as low as £280 on Cheapest nonstop routes (e.g. LGW to SEA on Sun, Apr 19), while Icelandair offers Cheapest nonstop round-trips from £356 departing on Tue, Apr 21 and returning on Mon, Apr 27.
  • At the moment, you can catch a direct flight from London to Seattle with the following airlines, including: Alaska Airlines Virgin Atlantic British Airways Delta Air Lines WestJet Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • It takes about 10 hours 4 minutes to fly from London (LON) to Seattle (SEA).
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from London to Seattle is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • Based on Trip.com data in the past 4 weeks, there is 25 flight per week flying from London to Seattle. You can check the weekly schedule for popular airlines on this route below: Virgin Atlantic: S/M/T/W/T/F/S -- VS105 (12:13) British Airways: S/M/T/W/T/F/S -- BA049 (17:18) Aer Lingus: S/M/T/W/T/F/S -- EI8749 (17:18)
  • To find best deals on flights from London to Seattle, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Sun, Apr 19, with one-way flights priced at just £280.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is British Airways.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Seattle travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from London to Seattle is September, when demand for travel is lower.
  • After crunching the numbers on our April flight calendar, it's currently cheapest to fly from London to Seattle on April 28, 2026 with Icelandair, with prices starting at £315.
  • You can land at any one of the following hubs in Seattle, with Heathrow Airport to Seattle-Tacoma International Airport (LHR-SEA) is by far the most common option on this route: King County (Boeing Field) International Airport (BFI) Kenmore Air Harbor Seaplane Base (LKE) Seattle-Tacoma International Airport (SEA).
  • The time difference between Seattle and London is 8h.
  • Tickets can only be changed or cancelled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

Flight from London to Seattle

Whenever we start picking out places for trips, we either go for mountains, forests, or water bodies. But what if we could see all three in one place? It sounds impossible, we know, but there are, in fact several spots in the world where this is possible. Seattle is one of those places. Often called the tourist heaven, Seattle is surrounded by water, mountains, and forests. Although the main city is completely a metropolitan area, there are several touristy things one can do in and around Seattle. So, let’s talk more about that.

Tip: Whether for business or pleasure, Seattle is perfect for a weekend getaway or even a longer trip!

How to get to Seattle

Once you’re in Seattle, you might not want to leave the place. No, we are not kidding, that is exactly how vibrant and beautiful the city is! Getting to Seattle is extremely hassle-free as many airlines have routes till there. If you are looking for flights from London to Seattle, British Airways provides some good deals on cheap and direct flights to Seattle. While there are many other airlines, Virgin Atlantic Airlines are most preferred for connecting cheap flights from London. Seattle–Tacoma International Airport is the primary commercial airport for the city, and it is the eighth-busiest airport in the USA! London to Seattle flights are typically ten hours if you decide to opt for the direct ones.

Tip: If you have a layover at Seattle, you could book a hotel and simply cover almost every tourist spot in 24 hours!

What to do in Seattle

Seattle is no longer a quaint city; it is an extremely bustling, active, and beautiful place to live in as well as to travel to. Apart from the undeniable natural beauty, the place is a storehouse of art, culture, music and more! If you are planning to see a lot in the city, you might as well take a city pass and save on entries and rides. There are also several parks in the city where you could take a stroll and enjoy the beauty of it all. For instance, Kerry Park gives an incredible view of the city’s skyline. Whereas Gasworks Park is best for small picnics and kite flying!

When in Seattle, you have to try Starbucks. You must be thinking what is so special in that, right? But, Seattle is actually home to the original Starbucks! You can take a tour of the factory, too. So what are you coffee lovers waiting for then?

We need not tell you that Seattle is bustling with local cuisine served in small street sides as well as fancy restaurants. Try Fremont or Capitol Hill for some great dishes. For shopaholics, a visit to the Pike Place Market is a must. Even Downtown Seattle has some great shopping places that you could try.

Tip: If you love quirky art installations, the Fremont Troll in one thing you must see when you’re in Seattle.

Planning a vacation? Your next trip should definitely be to Seattle! To make it happen, go to Trip.com and make your London to Seattle flight bookings in an instant and at great discounts!

More Flight Itineraries

Note: Prices shown on this page are the estimated lowest prices and include all taxes and fees found in the last 24 hours.

Book with no extra fees

Prices displayed on this page are all-inclusive (including taxes, fuel surcharges, civil aviation development fund, etc.), with all fees confirmed before payment. Fees for luggage, meals, Wi-Fi, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page have been updated within the last 24 hours—sometimes even in real time. The more popular the route, the more accurate the data.

Change & Cancellation Policy

Trip.com shows the cancellation and change policies for each flight ticket during the booking process, including any fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To request a change or cancellation, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and flight segment, and submit your request. Please note that additional charges may apply according to the airline's ticket policy.
Cancellation/change due to a flight schedule change:
If the flight schedule has changed and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please visit the customer support pages.