$527 Cheap Flights from London (LHR) to Seattle (SEA)

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Flight deals we found

These prices are lower than our typical predictions for similar flights.
65% less than typical
$1,095
Roundtrip per traveler
Tue, Aug 13 - Wed, Aug 28
British AirwaysBritish Airways
9h 45m
4:00pm
5:45pm
LHR
Nonstop
SEA
Found 6 hours ago
35% less than typical
$760
Roundtrip per traveler
Fri, Jun 7 - Sun, Jun 9
British AirwaysBritish Airways
9h 45m
9:50am
11:35am
LHR
Nonstop
SEA
Found 22 hours ago
70% less than typical
$745
Roundtrip per traveler
Mon, Jun 10 - Fri, Jul 5
FinnairFinnair
29h 50m
6:10pm
4:00pm
+1
LHR
1 stop • 17h 40m in HEL
SEA
Found 6 hours ago
70% less than typical
$777
Roundtrip per traveler
Sun, Jun 9 - Fri, Jul 5
Multiple airlinesMultiple airlines
23h 45m
6:35pm
10:20am
+1
LHR
1 stop • 12h 10m in AMS
SEA
Found 6 hours ago
70% less than typical
$730
Roundtrip per traveler
Sun, Jun 9 - Mon, Jul 1
Air FranceAir France
25h 45m
5:35pm
11:20am
+1
LHR
1 stop • 14h 15m in CDG
SEA
Found 6 hours ago
70% less than typical
$642
Roundtrip per traveler
Wed, Oct 9 - Wed, Oct 23
IcelandairIcelandair
12h 50m
1:05pm
5:55pm
LHR
1 stop • 1h 50m in KEF
SEA
Found 5 hours ago
65% less than typical
$770
Roundtrip per traveler
Sat, Jul 6 - Wed, Jul 17
DeltaDelta
13h 45m
10:55am
4:40pm
LHR
1 stop • 55m in SLC
SEA
Found 16 hours ago
65% less than typical
$743
Roundtrip per traveler
Wed, May 22 - Sat, Jun 1
Multiple airlinesMultiple airlines
12h 55m
11:45am
4:40pm
LHR
1 stop • 1h 10m in AMS
SEA
Found 2 hours ago
60% less than typical
$931
Roundtrip per traveler
Wed, Jul 17 - Wed, Jul 31
American AirlinesAmerican Airlines
15h 33m
2:25pm
9:58pm
LHR
1 stop • 2h 5m in ORD
SEA
Found 4 hours ago
55% less than typical
$1,135
Roundtrip per traveler
Sat, Jul 27 - Mon, Aug 5
American AirlinesAmerican Airlines
19h 38m
8:10am
7:48pm
LHR
1 stop • 6h 30m in ORD
SEA
Found 16 hours ago
60% less than typical
$935
Roundtrip per traveler
Mon, Jul 15 - Mon, Sep 16
American AirlinesAmerican Airlines
15h 33m
2:25pm
9:58pm
LHR
1 stop • 2h 5m in ORD
SEA
Found 4 hours ago
50% less than typical
$1,091
Roundtrip per traveler
Thu, Aug 15 - Thu, Aug 29
IcelandairIcelandair
21h 55m
9:25pm
11:20am
+1
LHR
1 stop • 10h 50m in KEF
SEA
Found 4 hours ago
40% less than typical
$718
Roundtrip per traveler
Fri, Jun 7 - Sun, Jun 9
IcelandairIcelandair
21h 55m
9:25pm
11:20am
+1
LHR
1 stop • 10h 50m in KEF
SEA
Found 22 hours ago

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Cheap Flights from London to Seattle (LHR-SEA)

Prices were available within the past 7 days and start at $527 for one-way flights and $587 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air France
Thu, Oct 24 - Thu, Nov 7
LHR
London
SEA
Seattle
$587 Roundtrip, found 5 days ago
$587
Roundtrip
found 5 days ago
Select Air France flight, departing Thu, Oct 24 from London to Seattle, returning Thu, Nov 7, priced at $587 found 5 days ago
Air France
Thu, Oct 24 - Thu, Nov 7
LHR
London
SEA
Seattle
$610 Roundtrip, found 5 days ago
$610
Roundtrip
found 5 days ago
Select Air France flight, departing Thu, Oct 24 from London to Seattle, returning Thu, Nov 7, priced at $610 found 5 days ago
Virgin Atlantic
Tue, Nov 5 - Mon, Nov 18
LHR
London
SEA
Seattle
$615 Roundtrip, found 4 days ago
$615
Roundtrip
found 4 days ago
Select Virgin Atlantic flight, departing Tue, Nov 5 from London to Seattle, returning Mon, Nov 18, priced at $615 found 4 days ago
Delta
Tue, Nov 5 - Mon, Nov 18
LHR
London
SEA
Seattle
$615 Roundtrip, found 4 days ago
$615
Roundtrip
found 4 days ago
Select Delta flight, departing Tue, Nov 5 from London to Seattle, returning Mon, Nov 18, priced at $615 found 4 days ago
British Airways
Mon, May 6 - Mon, May 20
LHR
London
SEA
Seattle
$621 Roundtrip, found 2 hours ago
$621
Roundtrip
found 2 hours ago
Select British Airways flight, departing Mon, May 6 from London to Seattle, returning Mon, May 20, priced at $621 found 2 hours ago
Lufthansa
Tue, Jan 7 - Tue, Jan 21
LHR
London
SEA
Seattle
$626 Roundtrip, found 1 day ago
$626
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Tue, Jan 7 from London to Seattle, returning Tue, Jan 21, priced at $626 found 1 day ago
United
Wed, Feb 12 - Mon, Feb 17
LHR
London
SEA
Seattle
$628 Roundtrip, found 2 days ago
$628
Roundtrip
found 2 days ago
Select United flight, departing Wed, Feb 12 from London to Seattle, returning Mon, Feb 17, priced at $628 found 2 days ago
American Airlines
Tue, May 14 - Thu, Nov 7
LHR
London
SEA
Seattle
$630 Roundtrip, found 4 days ago
$630
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, May 14 from London to Seattle, returning Thu, Nov 7, priced at $630 found 4 days ago
Icelandair
Mon, Nov 11 - Wed, Nov 27
LHR
London
SEA
Seattle
$635 Roundtrip, found 5 days ago
$635
Roundtrip
found 5 days ago
Select Icelandair flight, departing Mon, Nov 11 from London to Seattle, returning Wed, Nov 27, priced at $635 found 5 days ago
Iberia
Mon, May 6 - Mon, May 20
LHR
London
SEA
Seattle
$636 Roundtrip, found 2 hours ago
$636
Roundtrip
found 2 hours ago
Select Iberia flight, departing Mon, May 6 from London to Seattle, returning Mon, May 20, priced at $636 found 2 hours ago
Flights from London (LHR) to Seattle (SEA)
Origin airport
Heathrow
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, Swiss International Air Lines, Turkish Airlines, United, Virgin Atlantic, WestJet
Roundtrip price
$586
Distance
4786 mi
Average flight time
1 hour 56 mins

London to Seattle Flights

Whether you’re looking for a grand adventure or just want to get away for a last-minute break, flights from London to Seattle offer the perfect respite. Not only does exploring Seattle provide the chance to make some magical memories, dip into delectable dishes, and tour the local landmarks, but the cheap airfare means you won’t bust your budget. So no matter whether your ideal itinerary involves flying one way, non-stop, or round trip, you’re bound to find flights that match your schedule on Expedia, and at prices that won’t shock your wallet.

Bagging a cheap flight from London to Seattle may mean more dollars to spend on for one-of-a-kind souvenirs when you arrive, but it doesn’t mean you have to skimp on your travel experience, as Expedia offers a sizzling selection of cheap airlines that’ll put you in your happy place on their planes, whether that’s getting lost in a hair-raising airport thriller, dreaming on the passing landscape over a glass of bubbly, or jotting down your vacation bucket list at 38,000 feet. There’s also bound to be plenty of opportunities to snap a few photos of the high life that will make your friends green with envy. After all, enjoying the journey is part of the fun.

With so many affordable flights and so many wonderful adventures awaiting you, there’s no reason to put off booking a fantastic flight from LHR to SEA today. So don’t leave it to the last minute to make your dream trip a reality: pack your bags with your go-to travel accessories, put together your list of must-see attractions and can’t-miss activities, and get ready to broaden your horizons – with Expedia, the wonders of Seattle are only a plane trip away. Book your travel arrangements with us today!

If you would like to book flights to Seattle more flexibly many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to Seattle is $527 now!

Frequently asked questions

How much is a one-way flight from London Heathrow to Seattle - Tacoma Intl. Airport (SEA)?
Prepare to snap up a bargain, because one-way London flights to Seattle start from only $482. This info is based on the cheapest fare found on Expedia for this route with a departure date during the next three months. This airfare is for an WestJet flight, departing Heathrow Airport (LHR) on May 6 2024 and landing at Sea-Tac Airport. This price was last updated on April 28 2024 and has not changed since.
How long does it take to fly from Heathrow Airport to Seattle - Tacoma Intl. Airport (SEA)?
With British Airways, a direct flight takes around 9 hours and 45 minutes. Step on board the 9:50AM flight from LHR and arrive at SEA at 11:35AM. Grab an awesome deal on this and other routes when you book your ticket with Expedia.
Is it cheaper to buy a plane ticket from London Heathrow to Seattle - Tacoma Intl. Airport (SEA) last minute?
When it comes to booking your flights, it’s always better to be prepared. While you may be able to find a deal on a Heathrow Airport to Sea-Tac Airport flight at the last minute, prices usually don’t get cheaper as the departure date nears. Based on flight pricing and demand studies in 2022, we have found that the sweet spot to book a domestic flight is between 28 – 35 days in advance. For international journeys it’s between three and four months.
What is the cheapest airline flying from Heathrow Airport to Sea-Tac Airport in the next 90 days?
The cheapest carrier flying from London to Seattle found on Expedia is WestJet, which has fares starting from $482. This price is based on fares found on Expedia with a departure date within the next 90 days. The flight departs Heathrow Airport (LHR) on May 6 2024 and lands at Seattle - Tacoma Intl. Airport (SEA). The pricing information was updated on April 28 2024 and has not changed since.
What's the cheapest price for a flight from LHR to Sea-Tac Airport next month?
The best price for a one-way flight from London to Seattle over the next month is $482. If you want to travel soon, now’s the time to book. This ticket price was found after looking at all available flights on Expedia with a departure date within the next 30 days. This fare is for a one-way WestJet flight leaving Heathrow Airport on May 6 2024 and touching down at Sea-Tac Airport. Pricing info was updated on April 28 2024 and has not changed since.
What airline has the least delays from LHR to Sea-Tac Airport?
Recording an on-time performance of 93%, Delta Air Lines is the carrier that’s likelier to get you from London Heathrow to Sea-Tac Airport without any holdups. Flight delays can be an excuse to linger longer at the airport bar. However, they can also result in a missed connection that upends your entire journey. You can prepare for delays by looking up your flight status through the free Expedia App before heading to the airport. If you’re already there and the delay will significantly affect your plans, visit the customer service desk to find out your next steps.
Can I find cheap nonstop flights from Heathrow Airport (LHR) to Sea-Tac Airport in the next three months?
Get ready to save some money because we’ve come across a roundtrip nonstop flight with British Airways within the next 90 days for $615. The price was last updated on April 28 2024 and was found after looking at all available flights on Expedia with a departure date in the next three months. This flight from London to Seattle leaves Heathrow Airport (LHR) on May 8 2024 and arrives at Sea-Tac Airport. The flight’s return date is May 15 2024.It’s a cinch to find nonstop cheap flights from LHR to SEA by making use of our filters. Start by keying in the details of your journey, then press on “Nonstop” under “Filter by” on the left-hand side of the page. Your results will be listed with the lowest-priced fare first. If you don’t need to fly on a certain day, use our “Flexible dates” feature. This lets you compare ticket prices on surrounding days and score the best possible deal.
What airports do you fly into for Seattle from London?
From London, you can travel to Seattle via Seattle - Tacoma Intl. Airport (SEA), Renton Municipal Airport (RNT) and Boeing Field Airport (BFI). Research which hub is the best option for you before making your decision. If you decide to land at Seattle - Tacoma Intl. Airport (SEA), it’s roughly 12 mi south of downtown. Use the money you save when booking your fare with Expedia to explore the city’s well-known attractions, such as Space Needle and Pike Place Market.
What are the most popular departure times for flights from Heathrow Airport (LHR) to Sea-Tac Airport?
Between 12:00 PM - 1:00 PM is when you’ll find lots of Virgin Atlantic flights jetting from London Heathrow to Sea-Tac Airport. Our tip? Fly out early. With air traffic yet to build up around airports, your chances of catching a delay-free flight are higher.
Can I change the date of my flight from LHR to Sea-Tac Airport?
Life can throw a spanner in your plans, so Expedia is here to help make things easy. First, access your Heathrow Airport to Seattle - Tacoma Intl. Airport (SEA) itinerary through the Expedia Trips portal and check the fare conditions regarding changes. If you booked your airfare in the last 24 hours, some carriers will let you cancel at no cost and organize new flights. If you bought your ticket more than 24 hours ago, contact us through our Customer Service portal to find out what your options are.
Seattle nearby Airports

Seattle Paine Field Intl. Airport

London to Seattle Paine Field Intl. Airport
$3,206.98
London nearby Airports

London

Gatwick to Seattle
$612.20
London City to Seattle
$745.50
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