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Cheap flights from London Heathrow Airport to Seattle from £296

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/6. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
LHR — SEA
27 May — 3 Jun1
1 adult
Mon 27/5
Mon 3/6

The best prices from London Heathrow to Seattle/Tacoma Intl are usually found in November or February, booked 48 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Heathrow to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 22 May 2024.

Popular in

July

Cheapest in

November

Round-trip from

£453

One-way from

£307
High demand for flights, 23% potential price rise
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Best time to find cheap flights, 16% potential price drop
Search Deals
From London Heathrow to Seattle/Tacoma Intl
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One-way flight from London Heathrow to Seattle/Tacoma Intl
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What is the cheapest day to fly round-trip from London Heathrow Airport to Seattle?

Users have found that flying from London Heathrow Airport to Seattle on a Saturday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

How far in advance should I book a flight from London Heathrow Airport to Seattle?

Find a great deal and save up to 35% by booking at least 44 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from London Heathrow Airport to Seattle within the next two weeks, with the cheapest ticket starting at £530.

What is the cheapest month to fly from London Heathrow Airport to Seattle?

Due to multiple factors, expect to potentially pay more when booking in July. For low rates, November can be a great choice for travel to Seattle. Flights to Seattle from London Heathrow Airport in November are about £546 on average during November, but can be found for as low as £302.

When is the cheapest time to fly from London Heathrow Airport to Seattle (LHR - SEA)?

It’s typically best to fly out from London Heathrow Airport to Seattle in the evening. Doing so could potentially save you 6% on the flight price compared to flying in the afternoon, which is usually more expensive.

Cheap Icelandair flights from Heathrow to Seattle

Explore cheap flight options specifically provided by Icelandair for the route between Heathrow and Seattle. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 863,249 searches. Data last updated 22 May 2024.
Take a peek at the cheapest Icelandair flights we've detected travelling from London to Seattle. Make sure to check back often as deals are often changing.
Wed 4/913:05LHR - SEA
1 stop12h 35mIcelandair
Thu 12/918:55SEA - LHR
1 stop17h 25mIcelandair
Deal found 21/5£409
Tue 10/913:05LHR - SEA
1 stop12h 50mIcelandair
Mon 23/918:55SEA - LHR
1 stop17h 25mIcelandair
Deal found 22/5£410
Fri 15/1120:25LHR - SEA
1 stop28h 35mIcelandair
Sun 24/1114:35SEA - LHR
1 stop12h 20mIcelandair
Deal found 22/5£411
Sat 7/913:05LHR - SEA
1 stop30h 15mIcelandair
Sun 22/918:55SEA - LHR
1 stop33h 00mIcelandair
Deal found 21/5£412
Mon 2/921:25LHR - SEA
1 stop21h 55mIcelandair
Thu 12/918:55SEA - LHR
1 stop17h 25mIcelandair
Deal found 21/5£413
Sat 5/1013:05LHR - SEA
1 stop12h 50mIcelandair
Sat 19/1015:50SEA - LHR
1 stop12h 05mIcelandair
Deal found 22/5£416
Sat 19/1021:25LHR - SEA
1 stop28h 30mIcelandair
Fri 25/1015:50SEA - LHR
1 stop12h 05mIcelandair
Deal found 21/5£420
Fri 4/1013:05LHR - SEA
1 stop15h 30mIcelandair
Mon 7/1015:50SEA - LHR
1 stop12h 05mIcelandair
Deal found 22/5£421
Thu 7/1120:25LHR - SEA
1 stop28h 35mIcelandair
Sun 1/1214:35SEA - LHR
1 stop20h 45mIcelandair
Deal found 21/5£422

  • Icelandair is one of the most popular airlines used for those travelling from London Heathrow Airport to Seattle. Flights from Icelandair travelling this route typically cost £672.54 RT. This price is typically 61% more expensive than other airlines that offer London Heathrow Airport to Seattle flights. When booking this route, the cheapest RT price found was £323. The most popular departure airport in London Heathrow Airport when flying to Seattle is London Heathrow Airport. The most popular airport to fly into when visiting Seattle is Seattle/Tacoma Intl Airport. When flying from London Heathrow Airport to Seattle, Icelandair flights are 7% more popular than any other airline flying that same route.

Cheap Finnair flights from Heathrow to Seattle

Explore cheap flight options specifically provided by Finnair for the route between Heathrow and Seattle. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 863,249 searches. Data last updated 22 May 2024.
To aid your search, here are some of the cheapest Finnair flights we've found from London to Seattle. Deals frequently update to provide users with more options.
Mon 21/1009:50LHR - SEA
Nonstop9h 45mFinnair
Mon 28/1019:45SEA - LHR
Nonstop9h 20mFinnair
Deal found 21/5£475
Mon 21/1009:50LHR - SEA
Nonstop9h 45mFinnair
Mon 28/1013:50SEA - LHR
1 stop15h 00mFinnair
Deal found 21/5£479
Thu 31/1014:50LHR - SEA
Nonstop9h 55mFinnair
Mon 4/1118:45SEA - LHR
Nonstop9h 20mFinnair
Deal found 21/5£484
Thu 10/1016:00LHR - SEA
Nonstop9h 45mFinnair
Thu 24/1013:30SEA - LHR
Nonstop9h 20mFinnair
Deal found 22/5£490
Tue 22/1016:00LHR - SEA
Nonstop9h 45mFinnair
Sat 2/1114:45SEA - LHR
Nonstop9h 25mFinnair
Deal found 21/5£495
Thu 7/1114:50LHR - SEA
Nonstop9h 55mFinnair
Sun 1/1218:29SEA - LHR
1 stop33h 41mFinnair
Deal found 21/5£499
Fri 11/1016:00LHR - SEA
Nonstop9h 45mFinnair
Mon 14/1013:45SEA - LHR
1 stop14h 25mFinnair
Deal found 22/5£501
Tue 22/1016:00LHR - SEA
Nonstop9h 45mFinnair
Sat 2/1117:27SEA - LHR
1 stop15h 33mFinnair
Deal found 21/5£501
Wed 4/909:50LHR - SEA
Nonstop9h 45mFinnair
Sat 14/913:58SEA - LHR
1 stop14h 47mFinnair
Deal found 21/5£530

  • If you’re travelling from London Heathrow Airport to Seattle, one of the more common airlines travelling that route is Finnair. Flights from Finnair travelling this route typically cost £781.86 RT. This price is typically 61% more expensive than other airlines that offer London Heathrow Airport to Seattle flights. When booking this route, the cheapest RT price found was £560. London Heathrow Airport is the most common London Heathrow Airport airport to take off from when flying to Seattle. Seattle/Tacoma Intl Airport is the most popular arrival airport in Seattle. When flying from London Heathrow Airport to Seattle, Finnair flights are 4% more popular than any other airline flying that same route.

Cheap Heathrow to Seattle flights in May & June 2024

Find cheap flight options from Heathrow to Seattle specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 863,249 searches. Prices were last updated on 22 May 2024.
Scroll through some of the best deals on flights from London to Seattle in 2024. Check back soon for alternative fares.
Tue 18/621:25LHR - SEA
1 stop21h 55mIcelandair
Mon 1/723:00SEA - LHR
1 stop13h 20mIcelandair
Deal found 22/5£487
Tue 11/621:25LHR - SEA
1 stop21h 55mIcelandair
Tue 25/623:00SEA - LHR
1 stop13h 20mIcelandair
Deal found 21/5£488
Tue 18/621:25LHR - SEA
1 stop21h 55mIcelandair
Tue 25/623:00SEA - LHR
1 stop13h 20mIcelandair
Deal found 22/5£489
Tue 18/621:25LHR - SEA
1 stop21h 55mIcelandair
Tue 25/623:00SEA - LHR
1 stop13h 20mIcelandair
Deal found 21/5£492
Mon 3/621:25LHR - SEA
1 stop31h 10mIcelandair
Mon 10/623:00SEA - LHR
1 stop28h 55mIcelandair
Deal found 20/5£496
Tue 4/621:25LHR - SEA
1 stop21h 55mIcelandair
Tue 11/623:00SEA - LHR
1 stop13h 20mIcelandair
Deal found 21/5£501
Mon 17/621:25LHR - SEA
1 stop21h 55mIcelandair
Mon 24/623:00SEA - LHR
1 stop28h 55mIcelandair
Deal found 21/5£504
Tue 25/621:25LHR - SEA
1 stop21h 55mIcelandair
Mon 1/723:00SEA - LHR
1 stop13h 20mIcelandair
Deal found 20/5£507
Thu 20/613:10LHR - SEA
1 stop12h 30mIcelandair
Mon 1/723:00SEA - LHR
1 stop13h 20mIcelandair
Deal found 22/5£508

Heathrow to Seattle 2024 flight deals

Discover exclusive flight deals for travel between Heathrow and Seattle in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 863,249 searches. Data last updated 22 May 2024.
Scroll through some of the best deals on flights from London to Seattle in 2024. Check back soon for alternative fares.
Thu 24/1012:45LHR - SEA
Nonstop9h 55mMultiple Airlines
Sat 2/1119:05SEA - LHR
Nonstop9h 35mMultiple Airlines
Deal found 21/5£388
Wed 4/913:05LHR - SEA
1 stop12h 35mIcelandair
Thu 12/918:55SEA - LHR
1 stop17h 25mIcelandair
Deal found 21/5£409
Tue 10/913:05LHR - SEA
1 stop12h 50mIcelandair
Mon 23/918:55SEA - LHR
1 stop17h 25mIcelandair
Deal found 22/5£410
Fri 15/1120:25LHR - SEA
1 stop28h 35mIcelandair
Sun 24/1114:35SEA - LHR
1 stop12h 20mIcelandair
Deal found 22/5£411
Sat 7/913:05LHR - SEA
1 stop30h 15mIcelandair
Sun 22/918:55SEA - LHR
1 stop33h 00mIcelandair
Deal found 21/5£412
Mon 2/921:25LHR - SEA
1 stop21h 55mIcelandair
Thu 12/918:55SEA - LHR
1 stop17h 25mIcelandair
Deal found 21/5£413
Sat 5/1013:05LHR - SEA
1 stop12h 50mIcelandair
Sat 19/1015:50SEA - LHR
1 stop12h 05mIcelandair
Deal found 22/5£416
Sat 19/1021:25LHR - SEA
1 stop28h 30mIcelandair
Fri 25/1015:50SEA - LHR
1 stop12h 05mIcelandair
Deal found 21/5£420
Thu 7/1120:25LHR - SEA
1 stop28h 35mIcelandair
Sun 1/1214:35SEA - LHR
1 stop20h 45mIcelandair
Deal found 21/5£422

Direct flights to Seattle from Heathrow

Discover direct flight options from Heathrow to Seattle. Find direct flights with no stopovers, providing a convenient travel experience. Explore direct flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 863,249 searches. Data last updated 22 May 2024.
Consider booking one of these non-stop flights heading from London to Seattle. If you're looking for other options for flights from London to Seattle, make sure to update the search form at the top of page.
Thu 24/1012:45LHR - SEA
Nonstop9h 55mMultiple Airlines
Sat 2/1119:05SEA - LHR
Nonstop9h 35mMultiple Airlines
Deal found 21/5£388
Mon 21/1009:50LHR - SEA
Nonstop9h 45mFinnair
Mon 28/1019:45SEA - LHR
Nonstop9h 20mFinnair
Deal found 21/5£475
Thu 31/1014:50LHR - SEA
Nonstop9h 55mFinnair
Mon 4/1118:45SEA - LHR
Nonstop9h 20mFinnair
Deal found 21/5£484
Fri 11/1016:00LHR - SEA
Nonstop9h 45mBritish Airways
Mon 14/1019:40SEA - LHR
Nonstop9h 20mBritish Airways
Deal found 22/5£490
Thu 7/1116:35LHR - SEA
Nonstop10h 25mVirgin Atlantic
Sun 1/1215:20SEA - LHR
Nonstop9h 25mVirgin Atlantic
Deal found 21/5£494
Mon 9/916:50LHR - SEA
Nonstop10h 30mVirgin Atlantic
Mon 7/1021:10SEA - LHR
Nonstop9h 40mVirgin Atlantic
Deal found 21/5£494
Tue 22/1016:00LHR - SEA
Nonstop9h 45mFinnair
Sat 2/1114:45SEA - LHR
Nonstop9h 25mFinnair
Deal found 21/5£495
Tue 22/1009:50LHR - SEA
Nonstop9h 45mBritish Airways
Sat 2/1114:45SEA - LHR
Nonstop9h 25mBritish Airways
Deal found 22/5£501
Fri 15/1116:35LHR - SEA
Nonstop10h 25mVirgin Atlantic
Sun 24/1118:05SEA - LHR
Nonstop9h 35mVirgin Atlantic
Deal found 22/5£504

Heathrow to Seattle flights leaving soon

Find last-minute flight options from Heathrow to Seattle for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 863,249 searches. Data last updated 22 May 2024.
Have a look at some of the flights available from London to Seattle departing last-minute. Users should examine the flight details to ensure there are no surprises.
Sat 1/621:25LHR - SEA
1 stop21h 55mIcelandair
Mon 10/623:00SEA - LHR
1 stop13h 20mIcelandair
Deal found 21/5£538
Sat 1/610:25LHR - SEA
1 stop36h 01mLufthansa
Sun 2/623:29SEA - LHR
1 stop27h 11mLufthansa
Deal found 21/5£554
Sat 1/621:25LHR - SEA
1 stop21h 55mIcelandair
Fri 7/623:00SEA - LHR
1 stop13h 20mIcelandair
Deal found 21/5£563
Tue 28/521:25LHR - SEA
1 stop21h 55mIcelandair
Sat 1/618:55SEA - LHR
1 stop33h 00mIcelandair
Deal found 21/5£567
Fri 31/521:25LHR - SEA
1 stop21h 55mIcelandair
Tue 11/623:00SEA - LHR
1 stop13h 20mIcelandair
Deal found 21/5£572
Sat 1/621:25LHR - SEA
1 stop21h 55mIcelandair
Mon 17/623:00SEA - LHR
1 stop13h 20mIcelandair
Deal found 22/5£585
Mon 27/521:25LHR - SEA
1 stop31h 10mIcelandair
Mon 3/618:55SEA - LHR
1 stop33h 00mIcelandair
Deal found 20/5£593
Wed 29/513:05LHR - SEA
1 stop15h 30mIcelandair
Mon 3/618:55SEA - LHR
1 stop17h 25mIcelandair
Deal found 21/5£596
Wed 29/513:05LHR - SEA
1 stop15h 30mIcelandair
Mon 3/618:55SEA - LHR
1 stop17h 25mIcelandair
Deal found 22/5£596

One-way flights to Seattle from Heathrow

Search for one-way flight options from Heathrow to Seattle. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 863,249 searches. Data last updated 22 May 2024.
If you're seeking multiple options on one-way flights from London to Seattle, be sure to check out these deals, which are updated often. Those needing a return flight from London to Seattle can use the search form above.
Wed 12/613:45LHR - SEA
3 stops41h 09mMultiple Airlines
Deal found 21/5£296
Sun 16/607:25LHR - SEA
2 stops44h 56mMultiple Airlines
Deal found 22/5£307
Thu 6/607:35LHR - SEA
3 stops56h 22mMultiple Airlines
Deal found 21/5£311
Tue 11/614:35LHR - SEA
3 stops34h 07mMultiple Airlines
Deal found 21/5£315
Sun 16/607:25LHR - SEA
2 stops37h 31mMultiple Airlines
Deal found 21/5£318
Mon 17/621:10LHR - SEA
2 stops31h 11mMultiple Airlines
Deal found 22/5£325
Mon 17/614:30LHR - SEA
3 stops37h 51mMultiple Airlines
Deal found 22/5£325
Tue 18/606:45LHR - SEA
2 stops21h 36mMultiple Airlines
Deal found 22/5£327
Fri 7/620:45LHR - SEA
2 stops46h 35mMultiple Airlines
Deal found 21/5£330

Find flights from Heathrow to Seattle within your budget

Customise your flight search to find flights from Heathrow to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 863,249 searches. Data last updated 22 May 2024.

Fly from

Any airport

Fly to

Any airport

Budget

£388 - £543

Route

Depart

Return

Price

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Thu 24/10

Nonstop9h 55m

Seattle/Tacoma Intl

Sat 2/11

Nonstop9h 35m

£388

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Wed 4/9

1 stop12h 35m

Seattle/Tacoma Intl

Thu 12/9

1 stop17h 25m

£409

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Mon 21/10

Nonstop9h 45m

Seattle/Tacoma Intl

Mon 28/10

Nonstop9h 20m

£475

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Fri 4/10

Nonstop10h 25m

Seattle/Tacoma Intl

Mon 7/10

Nonstop9h 40m

£483

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Thu 31/10

1 stop17h 33m

Seattle/Tacoma Intl

Mon 4/11

Nonstop9h 20m

£494

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Tue 1/10

Nonstop9h 45m

Seattle/Tacoma Intl

Sun 13/10

1 stop14h 25m

£509

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Tue 1/10

Nonstop9h 45m

Seattle/Tacoma Intl

Sun 13/10

Nonstop9h 20m

£511

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Mon 9/9

2 stops16h 00m

Seattle/Tacoma Intl

Wed 25/9

1 stop13h 32m

£514

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Mon 9/9

1 stop14h 20m

Seattle/Tacoma Intl

Wed 25/9

Nonstop9h 35m

£543

Flights are sorted by cheapest first

Deals found on 21/5

When is the best time to book a flight from London Heathrow Airport to Seattle?

Use this chart to determine the optimal time to book a return flight from Heathrow to Seattle. Price data was last updated on 10 May 2024.
The best time to book flights from London Heathrow Airport to Seattle is 48 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.
Search Deals

When is the cheapest time to fly from London Heathrow Airport to Seattle?

Use this chart to determine the cheapest time to fly return from Heathrow to Seattle. Price data was last updated on 19 May 2024.
Morning
Midday
Afternoon
Evening
All times are departure.
Travellers seeking maximum savings on their London Heathrow Airport to Seattle flight should consider departing on Monday evenings when fares are most often at their lowest. Sunday at midday flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Best time to book a flight from Heathrow to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Heathrow with our price prediction graph.
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.

Temperature and rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average temperature and rainfall totals by month.

SEA

Temperature

5 - 19 °C

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated 22 May 2024.
Get a feel of what it's like to fly with Icelandair, Finnair and British Airways from London to Seattle by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.9
Good
1,555 reviews
Check prices

Entertainment

7.2

Boarding

7.8

Food

7.3

Comfort

7.7

Overall

7.9

Crew

8.4

Reviews

1 / 10

Departure was late. Plane much too small for an 11 hour flight. One bathroom was out of order in a completely full flight.

KLM
7.9
Good
1,555 reviews
KLM
7.9
Good
1,555 reviews
Check prices

Entertainment

7.2

Boarding

7.8

Food

7.3

Comfort

7.7

Overall

7.9

Crew

8.4

Reviews

1 / 10

Departure was late. Plane much too small for an 11 hour flight. One bathroom was out of order in a completely full flight.

Finnair
7.8
Good
1,370 reviews
KLM
7.9
Good
1,555 reviews
Check prices

Entertainment

7.2

Boarding

7.8

Food

7.3

Comfort

7.7

Overall

7.9

Crew

8.4

Reviews

1 / 10

Departure was late. Plane much too small for an 11 hour flight. One bathroom was out of order in a completely full flight.

Virgin Atlantic
7.7
Good
730 reviews
KLM
7.9
Good
1,555 reviews
Check prices

Entertainment

7.2

Boarding

7.8

Food

7.3

Comfort

7.7

Overall

7.9

Crew

8.4

Reviews

1 / 10

Departure was late. Plane much too small for an 11 hour flight. One bathroom was out of order in a completely full flight.

Air France
7.6
Good
1,755 reviews
KLM
7.9
Good
1,555 reviews
Check prices

Entertainment

7.2

Boarding

7.8

Food

7.3

Comfort

7.7

Overall

7.9

Crew

8.4

Reviews

1 / 10

Departure was late. Plane much too small for an 11 hour flight. One bathroom was out of order in a completely full flight.

WestJet
7.5
Good
2,898 reviews
KLM
7.9
Good
1,555 reviews
Check prices

Entertainment

7.2

Boarding

7.8

Food

7.3

Comfort

7.7

Overall

7.9

Crew

8.4

Reviews

1 / 10

Departure was late. Plane much too small for an 11 hour flight. One bathroom was out of order in a completely full flight.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from London Heathrow?

    If you book a flight to Seattle from London Heathrow, you will be flying to Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle. There are 21 flights from London Heathrow to Seattle/Tacoma Intl per day from 14 different airlines.

  • Can I find flights from London Heathrow Airport to Seattle for under £400 on Cheapflights?

    Yes, there are multiple flights from London Heathrow Airport to Seattle for under £400. The cheapest flight booked recently is on Multiple Airlines for just £388, but on average you can expect to pay £429.

  • Are there nonstop flights from London Heathrow Airport to Seattle for under £400 on Cheapflights?

    Cheapflights has at least 20 direct flights from London Heathrow Airport to Seattle under £400. A good price for a nonstop flight from London Heathrow Airport to Seattle is less than £512.

  • Are there last-minute flights available from London Heathrow Airport to Seattle for under £600?

    There are currently 20+ open flights from London Heathrow Airport to Seattle within the next 7 days for less than £600.

  • What are the cheapest airlines flying from London Heathrow Airport to Seattle round-trip?

    According to our current data, Icelandair (£409), Finnair (£475), and Virgin Atlantic (£483) offers the cheapest pricing from London Heathrow Airport to Seattle. Icelandair is priced at 26% lower than the current average price of a flight leaving 3 months from now.

  • What are the most reliable airlines from London Heathrow Airport to Seattle?

    Consider KLM (75%), American Airlines (73%) or Aer Lingus (73%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to Seattle.

  • What are the cheapest flights from London Heathrow Airport to Seattle?

    The cheapest flight price from London Heathrow Airport to Seattle is £494. On average you can expect to pay £1,933. The most popular route, (London Heathrow - Seattle/Tacoma Intl), can usually be booked for £388.

  • What does LHR to SEA mean?

    This is defined as London Heathrow Airport (LHR) and Seattle/Tacoma Intl Airport (SEA). Codes like Seattle/Tacoma Intl Airport are often used to just call airports uniquely.

  • Can I find deals for flights from Heathrow to Seattle that include extra baggage allowance?

    The amount of baggage you can bring on your Heathrow to Seattle flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Heathrow to Seattle with specific airlines?

    Yes, Cheapflights allows you to browse and filter Heathrow to Seattle flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Heathrow to Seattle that include hotel bookings?

    Yes. In addition to deals on Heathrow to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Seattle.

  • Can I find deals for business class flights from Heathrow to Seattle?

    Yes. Cheapflights offers flight deals from Heathrow to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Heathrow to Seattle that allow pets onboard?

    Many airlines flying from Heathrow to Seattle offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Heathrow to Seattle?

    Yes, you can often find last-minute deals on Heathrow to Seattle flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the London Heathrow Airport to Seattle flight deals updated?

    The London Heathrow Airport to Seattle flight deals you see on this page were last updated on 22/5.

  • What are the most popular airlines that fly from London Heathrow Airport to Seattle?

    When booking a flight from London Heathrow Airport to Seattle, you may want to consider flying on American Airlines, Air Canada or Air France as they are the most popular for this route.

  • When is the best time to book a flight from London Heathrow Airport to Seattle?

    Currently, December is the cheapest month in which you can book a flight from London Heathrow Airport to Seattle (average of £576). Flying from London Heathrow Airport to Seattle in July is currently the most expensive (average of £805). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Fly from Heathrow to Seattle on these airlines
Choose from the following airlines for your flight from Heathrow to Seattle. Flights are based on user searches made on Cheapflights and were last updated on 22 May 2024.

Virgin Atlantic flights from London Heathrow to Seattle/Tacoma Intl
British Airways flights from London Heathrow to Seattle/Tacoma Intl
Finnair flights from London Heathrow to Seattle/Tacoma Intl

Top 10 airlines flying from Heathrow to Seattle

Discover the top 10 airlines that operate flights from Heathrow to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 863,249 searches. Data last updated 22 May 2024.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£254Average£529FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Virgin AtlanticCheapest£388Average£570FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£413Average£564FlexibilityNo cancel feeOn-time70%
Search British Airways flights
IcelandairCheapest£416Average£560FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air CanadaCheapest£427Average£504FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapest£429Average£577FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
LufthansaCheapest£434Average£571FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£437Average£510FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
KLMCheapest£440Average£614FlexibilityNo cancel feeOn-time75%
Search KLM flights
FinnairCheapest£442Average£591FlexibilityNo cancel feeOn-time76%
Search Finnair flights
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Search flights from Heathrow to Seattle by cabin class

Find flights from Heathrow to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Hourly flight availability from Heathrow to Seattle

Find hourly flight availability from Heathrow to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 22 May 2024.
1%of flight departuresEarly morningMidnight to 6 am
43%of flight departuresMorning6 am to noon
56%of flight departuresAfternoonNoon to 6 pm
0%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Midday
6 PM

Weekly flight availability from Heathrow to Seattle

Explore weekly flight availability from Heathrow to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 22 May 2024.
Monday20daily flights
Tuesday24daily flights
Wednesday20daily flights
Thursday20daily flights
Friday20daily flights
Saturday25daily flights
Sunday20daily flights

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Seattle?

Deals for Heathrow to Seattle flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights helps you find that perfect flight to Seattle from Heathrow by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Heathrow to Seattle with no change fees?

Need flexible booking options for your flight to Seattle from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Yes! Start tracking prices for Heathrow to Seattle flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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