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Cheap flights from Heathrow (LHR) to Seattle (SEA) from $354

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 5/19. 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
May 19 — May 261
From?
To?
Sun 5/19
Sun 5/26
1 adult, Economy
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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 May 14, 2024.

Popular in

July

Cheapest in

November

Average price

$718

Round-trip from

$247
High demand for flights, 23% potential price rise
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Best time to find cheap flights, 16% potential price drop
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Average for round-trip flights in May 2024
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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?

Flying to your destination on a Saturday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to Seattle. Check prices with Cheapflights to find a great deal 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 $674.

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

November can be a great time to fly to Seattle from London Heathrow Airport with a flight ticket averaging about $694. Cheapflights users have found deals in the month of November for as cheap as $382. The most expensive prices can be found in the month of July.

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

One of the essential ways to save on airfare from London Heathrow Airport to Seattle is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight at noon could potentially save you up to 21% on airfare.

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 2,632,958 searches. Data last updated May 14, 2024.
Check out some of the cheapest Finnair flights we've come across from London to Seattle. Deals update often to give you more flight options matching your criteria
Mon 5/209:50 amLHR - SEA
Nonstop9h 45mFinnair
Mon 5/277:40 pmSEA - LHR
Nonstop9h 20mFinnair
Deal found 5/13$656
Mon 5/208:40 amLHR - SEA
1 stop18h 41mFinnair
Mon 5/277:40 pmSEA - LHR
Nonstop9h 20mFinnair
Deal found 5/13$666
Tue 6/252:45 pmLHR - SEA
1 stop34h 27mFinnair
Tue 7/161:29 pmSEA - LHR
1 stop14h 46mFinnair
Deal found 5/14$680
Mon 6/1011:15 amLHR - SEA
1 stop18h 31mFinnair
Thu 6/201:25 pmSEA - LHR
1 stop12h 55mFinnair
Deal found 5/13$683
Tue 6/119:50 amLHR - SEA
Nonstop9h 45mFinnair
Tue 6/187:12 pmSEA - LHR
1 stop29h 48mFinnair
Deal found 5/13$688
Tue 6/119:50 amLHR - SEA
Nonstop9h 45mFinnair
Mon 6/245:51 pmSEA - LHR
1 stop14h 14mFinnair
Deal found 5/13$694
Thu 5/234:55 pmLHR - SEA
1 stop26h 57mFinnair
Mon 6/37:40 pmSEA - LHR
Nonstop9h 20mFinnair
Deal found 5/13$716
Fri 5/2411:15 amLHR - SEA
1 stop17h 35mFinnair
Mon 5/2711:59 pmSEA - LHR
1 stop23h 51mFinnair
Deal found 5/14$718
Fri 5/243:35 pmLHR - SEA
1 stop15h 30mFinnair
Wed 5/298:40 amSEA - LHR
1 stop20h 10mFinnair
Deal found 5/13$719

  • If you’re traveling from London Heathrow Airport to Seattle, one of the more common airlines traveling that route is Finnair. London Heathrow Airport to Seattle flights are typically 87% cheaper than other airlines traveling the same route. Flights from Finnair typically cost $758.90 RT. The cheapest Finnair flight found for this route was $568. 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 10% more popular than any other airline flying that same route.

Cheap United Airlines flights from Heathrow to Seattle

Explore cheap flight options specifically provided by United Airlines 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 2,632,958 searches. Data last updated May 14, 2024.
To aid your search, here are some of the cheapest United Airlines flights we've found from London to Seattle. Ensure the flight price, dates, time, and airline match your criteria before you book.
Wed 9/256:30 amLHR - SEA
2 stops19h 56mUnited Airlines
Tue 10/812:44 pmSEA - LHR
1 stop17h 26mUnited Airlines
Deal found 5/14$599
Tue 9/246:30 amLHR - SEA
1 stop13h 45mUnited Airlines
Mon 10/77:15 amSEA - LHR
1 stop20h 20mUnited Airlines
Deal found 5/14$609
Tue 9/109:30 amLHR - SEA
2 stops23h 53mUnited Airlines
Sun 9/2211:59 pmSEA - LHR
1 stop27h 46mUnited Airlines
Deal found 5/14$615
Wed 9/252:05 pmLHR - SEA
1 stop15h 10mUnited Airlines
Tue 10/812:30 pmSEA - LHR
1 stop13h 10mUnited Airlines
Deal found 5/14$617
Sat 6/112:20 pmLHR - SEA
1 stop30h 20mUnited Airlines
Sun 6/211:29 pmSEA - LHR
2 stops23h 01mUnited Airlines
Deal found 5/13$620
Mon 9/306:30 amLHR - SEA
2 stops16h 00mUnited Airlines
Wed 10/98:38 amSEA - LHR
1 stop19h 42mUnited Airlines
Deal found 5/14$640
Wed 6/56:30 amLHR - SEA
1 stop13h 55mUnited Airlines
Tue 6/182:22 pmSEA - LHR
1 stop13h 58mUnited Airlines
Deal found 5/13$691
Tue 10/86:30 amLHR - SEA
1 stop13h 45mUnited Airlines
Thu 10/177:00 amSEA - LHR
1 stop19h 25mUnited Airlines
Deal found 5/14$692
Mon 5/2011:05 amLHR - SEA
2 stops19h 48mUnited Airlines
Mon 6/312:45 pmSEA - LHR
1 stop13h 55mUnited Airlines
Deal found 5/13$705

  • If you’re traveling from London Heathrow Airport to Seattle, one of the more common airlines traveling that route is United Airlines. Flights from United Airlines traveling this route typically cost $751.06 RT. This price is typically 80% more expensive than other airlines that offer London Heathrow Airport to Seattle flights. When booking this route, the cheapest RT price found was $611. 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, United Airlines flights are 5% 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 2,632,958 searches. Prices were last updated on May 14, 2024.
Scroll through some of the best deals on flights from London to Seattle in 2024. Check back regularly for other flight deals.
Mon 6/109:50 amLHR - SEA
Nonstop9h 45mMultiple Airlines
Mon 6/177:06 amSEA - LHR
1 stop23h 19mMultiple Airlines
Deal found 5/14$582
Sat 6/159:25 pmLHR - SEA
1 stop21h 55mIcelandair
Mon 9/233:50 pmSEA - LHR
1 stop20h 30mIcelandair
Deal found 5/14$613
Mon 6/39:25 pmLHR - SEA
1 stop21h 55mIcelandair
Mon 6/106:55 pmSEA - LHR
1 stop33h 00mIcelandair
Deal found 5/13$618
Tue 6/49:25 pmLHR - SEA
1 stop28h 15mIcelandair
Mon 6/1711:00 pmSEA - LHR
1 stop13h 20mIcelandair
Deal found 5/13$619
Sat 6/14:15 pmLHR - SEA
1 stop30h 11mUnited Airlines
Sun 6/210:25 pmSEA - LHR
1 stop24h 20mUnited Airlines
Deal found 5/13$620
Tue 5/289:25 pmLHR - SEA
1 stop21h 55mIcelandair
Mon 6/33:50 pmSEA - LHR
1 stop20h 30mIcelandair
Deal found 5/12$621
Mon 6/109:25 pmLHR - SEA
1 stop31h 10mIcelandair
Mon 6/1711:00 pmSEA - LHR
1 stop28h 55mIcelandair
Deal found 5/14$622
Thu 6/69:25 pmLHR - SEA
1 stop28h 15mIcelandair
Thu 7/411:00 pmSEA - LHR
1 stop28h 55mIcelandair
Deal found 5/13$624
Tue 6/119:25 pmLHR - SEA
1 stop28h 15mIcelandair
Mon 6/2411:00 pmSEA - LHR
1 stop28h 55mIcelandair
Deal found 5/13$627

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 2,632,958 searches. Data last updated May 14, 2024.
Scroll through some of the best deals on flights from London to Seattle in 2024. Check back regularly for other flight deals.
Mon 6/109:50 amLHR - SEA
Nonstop9h 45mMultiple Airlines
Mon 6/177:06 amSEA - LHR
1 stop23h 19mMultiple Airlines
Deal found 5/14$582
Tue 11/57:40 amLHR - SEA
1 stop17h 25mLufthansa
Mon 11/112:07 pmSEA - LHR
1 stop13h 08mLufthansa
Deal found 5/13$583
Tue 11/57:40 amLHR - SEA
1 stop17h 25mLufthansa
Mon 11/116:31 amSEA - LHR
1 stop17h 24mLufthansa
Deal found 5/14$585
Fri 11/12:50 pmLHR - SEA
Nonstop9h 55mMultiple Airlines
Wed 11/276:45 pmSEA - LHR
Nonstop9h 20mMultiple Airlines
Deal found 5/14$587
Tue 11/52:50 pmLHR - SEA
Nonstop9h 55mBritish Airways
Mon 11/116:45 pmSEA - LHR
Nonstop9h 20mBritish Airways
Deal found 5/13$596
Wed 9/116:30 amLHR - SEA
2 stops16h 00mMultiple Airlines
Thu 9/268:05 amSEA - LHR
1 stop14h 40mMultiple Airlines
Deal found 5/13$598
Wed 9/256:30 amLHR - SEA
2 stops19h 56mUnited Airlines
Tue 10/812:44 pmSEA - LHR
1 stop17h 26mUnited Airlines
Deal found 5/14$599
Wed 11/612:15 pmLHR - SEA
1 stop12h 45mIcelandair
Thu 11/142:35 pmSEA - LHR
1 stop20h 45mIcelandair
Deal found 5/13$600
Tue 11/511:35 amLHR - SEA
Nonstop9h 55mVirgin Atlantic
Mon 11/113:20 pmSEA - LHR
Nonstop9h 25mVirgin Atlantic
Deal found 5/14$601

Non-stop flights to Seattle from Heathrow

Discover non-stop flight options from Heathrow to Seattle. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 2,632,958 searches. Data last updated May 14, 2024.
Consider booking one of these non-stop flights heading from London to Seattle. Those looking to potentially save on 1 or 2-stop flights from London to Seattle should utilize the search form at the the top of the page.
Fri 11/12:50 pmLHR - SEA
Nonstop9h 55mMultiple Airlines
Wed 11/276:45 pmSEA - LHR
Nonstop9h 20mMultiple Airlines
Deal found 5/14$587
Tue 11/52:50 pmLHR - SEA
Nonstop9h 55mBritish Airways
Mon 11/116:45 pmSEA - LHR
Nonstop9h 20mBritish Airways
Deal found 5/13$596
Tue 11/511:35 amLHR - SEA
Nonstop9h 55mVirgin Atlantic
Mon 11/113:20 pmSEA - LHR
Nonstop9h 25mVirgin Atlantic
Deal found 5/14$601
Tue 11/59:25 amLHR - SEA
Nonstop10h 00mMultiple Airlines
Mon 11/116:45 pmSEA - LHR
Nonstop9h 20mMultiple Airlines
Deal found 5/14$620
Wed 9/184:50 pmLHR - SEA
Nonstop10h 30mDelta
Tue 10/14:30 pmSEA - LHR
Nonstop9h 20mDelta
Deal found 5/14$634
Wed 11/62:50 pmLHR - SEA
Nonstop9h 55mIberia
Thu 11/146:45 pmSEA - LHR
Nonstop9h 20mIberia
Deal found 5/13$637
Thu 9/124:50 pmLHR - SEA
Nonstop10h 30mVirgin Atlantic
Thu 9/269:15 pmSEA - LHR
Nonstop9h 35mVirgin Atlantic
Deal found 5/13$638
Mon 9/912:45 pmLHR - SEA
Nonstop9h 55mDelta
Mon 9/234:30 pmSEA - LHR
Nonstop9h 20mDelta
Deal found 5/13$644
Tue 11/52:50 pmLHR - SEA
Nonstop9h 55mBritish Airways
Sun 11/106:45 pmSEA - LHR
Nonstop9h 20mBritish Airways
Deal found 5/13$660

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 2,632,958 searches. Data last updated May 14, 2024.
Book one of these great deals on flights from London to Seattle. Users should examine the flight details to ensure there are no surprises.
Mon 5/209:50 amLHR - SEA
Nonstop9h 45mFinnair
Mon 5/277:40 pmSEA - LHR
Nonstop9h 20mFinnair
Deal found 5/13$656
Mon 5/208:40 amLHR - SEA
1 stop18h 41mFinnair
Mon 5/277:40 pmSEA - LHR
Nonstop9h 20mFinnair
Deal found 5/13$666
Wed 5/222:05 pmLHR - SEA
1 stop15h 11mAir Canada
Tue 5/281:10 pmSEA - LHR
1 stop16h 10mAir Canada
Deal found 5/14$690
Wed 5/229:30 amLHR - SEA
1 stop19h 46mAir Canada
Thu 5/3010:40 amSEA - LHR
2 stops15h 20mAir Canada
Deal found 5/14$700
Tue 5/2111:45 amLHR - SEA
1 stop12h 55mDelta
Wed 5/291:30 pmSEA - LHR
1 stop12h 30mDelta
Deal found 5/14$704
Mon 5/2011:05 amLHR - SEA
2 stops19h 48mUnited Airlines
Mon 6/312:45 pmSEA - LHR
1 stop13h 55mUnited Airlines
Deal found 5/13$705
Tue 5/218:30 amLHR - SEA
1 stop15h 09mUnited Airlines
Mon 5/2712:45 pmSEA - LHR
1 stop12h 55mUnited Airlines
Deal found 5/14$706
Mon 5/2012:15 pmLHR - SEA
1 stop17h 41mAmerican Airlines
Mon 5/2712:09 pmSEA - LHR
1 stop16h 01mAmerican Airlines
Deal found 5/13$708
Mon 5/206:30 amLHR - SEA
2 stops16h 49mDelta
Sun 6/212:40 amSEA - LHR
1 stop22h 35mDelta
Deal found 5/13$709

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 2,632,958 searches. Data last updated May 14, 2024.
Some of the best available deals we've found on one-way flights from London to Seattle. Those seeking round-trip flights from London to Seattle should utilize the search form at the the top of the page.
Sun 5/197:25 amLHR - SEA
2 stops37h 31mMultiple Airlines
Deal found 5/13$354
Sun 5/197:25 amLHR - SEA
2 stops37h 31mMultiple Airlines
Deal found 5/13$357
Wed 6/269:25 pmLHR - SEA
2 stops23h 31mMultiple Airlines
Deal found 5/13$388
Wed 6/56:45 amLHR - SEA
2 stops21h 35mMultiple Airlines
Deal found 5/14$394
Sun 5/197:25 amLHR - SEA
2 stops37h 31mMultiple Airlines
Deal found 5/14$396
Fri 6/79:25 pmLHR - SEA
2 stops30h 55mMultiple Airlines
Deal found 5/13$397
Wed 6/59:25 pmLHR - SEA
2 stops30h 55mMultiple Airlines
Deal found 5/13$399
Sun 5/195:35 pmLHR - SEA
3 stops27h 21mMultiple Airlines
Deal found 5/13$400
Wed 6/126:45 amLHR - SEA
2 stops21h 35mMultiple Airlines
Deal found 5/14$401

Find flights from Heathrow to Seattle within your budget

Customize 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 2,632,958 searches. Data last updated May 14, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$582 - $627

Route

Depart

Return

Price

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Mon 6/10

Nonstop9h 45m

Seattle/Tacoma Intl

Mon 6/17

1 stop23h 19m

$582

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Tue 11/5

1 stop17h 25m

Seattle/Tacoma Intl

Mon 11/11

1 stop13h 08m

$583

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Tue 11/5

Nonstop9h 55m

Seattle/Tacoma Intl

Mon 11/11

Nonstop9h 20m

$596

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Wed 9/25

2 stops19h 56m

Seattle/Tacoma Intl

Tue 10/8

1 stop17h 26m

$599

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Wed 11/6

1 stop12h 45m

Seattle/Tacoma Intl

Thu 11/14

1 stop20h 45m

$600

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Tue 11/5

Nonstop9h 55m

Seattle/Tacoma Intl

Mon 11/11

Nonstop9h 25m

$601

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Wed 9/11

1 stop13h 05m

Seattle/Tacoma Intl

Mon 9/23

1 stop12h 25m

$621

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Tue 9/17

1 stop18h 22m

Seattle/Tacoma Intl

Thu 9/26

1 stop18h 35m

$623

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Wed 11/6

2 stops16h 56m

Seattle/Tacoma Intl

Sat 11/16

2 stops16h 15m

$627

Flights are sorted by cheapest first

Deals found on 5/14

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 round-trip flight from Heathrow to Seattle. Price data was last updated on May 10, 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 round-trip from Heathrow to Seattle. Price data was last updated on May 12, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their London Heathrow Airport to Seattle flight should consider departing on Thursday at noon when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
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Average price of flights to Seattle by month

Plan your trip from Heathrow to Seattle by taking into account the cheapest months to travel. The average price of a one-way flight from Heathrow to Seattle is currently $387 while a round-trip flight costs $604. Price data was last updated on May 12, 2024.

Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Seattle (average of $247). Flying from London Heathrow Airport to Seattle in July is currently the most expensive (average of $407). 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.

January

$247

February

$254

March

$288

April

$294

May

$318

June

$404

July

$407

August

$344

September

$278

October

$256

November

$258

December

$248

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

41 - 66.2 °F

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 May 14, 2024.
Read through reviews of airlines operating flights from London to Seattle, such as Finnair, United Airlines and Icelandair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
10,706 reviews
Check prices

Comfort

7.9

Crew

8.6

Boarding

8.2

Food

7.4

Entertainment

8.0

Overall

8.0

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Delta
8.0
Very good
10,706 reviews
Delta
8.0
Very good
10,706 reviews
Check prices

Comfort

7.9

Crew

8.6

Boarding

8.2

Food

7.4

Entertainment

8.0

Overall

8.0

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

KLM
7.9
Good
1,569 reviews
Delta
8.0
Very good
10,706 reviews
Check prices

Comfort

7.9

Crew

8.6

Boarding

8.2

Food

7.4

Entertainment

8.0

Overall

8.0

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

SWISS
7.8
Good
1,993 reviews
Delta
8.0
Very good
10,706 reviews
Check prices

Comfort

7.9

Crew

8.6

Boarding

8.2

Food

7.4

Entertainment

8.0

Overall

8.0

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Finnair
7.8
Good
1,377 reviews
Delta
8.0
Very good
10,706 reviews
Check prices

Comfort

7.9

Crew

8.6

Boarding

8.2

Food

7.4

Entertainment

8.0

Overall

8.0

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Austrian Airlines
7.7
Good
1,054 reviews
Delta
8.0
Very good
10,706 reviews
Check prices

Comfort

7.9

Crew

8.6

Boarding

8.2

Food

7.4

Entertainment

8.0

Overall

8.0

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

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?

    Located just 11.4 mi from the city center, Seattle/Tacoma Intl is the airport most travelers will use when flying to Seattle from London Heathrow. Booking flights from London Heathrow to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 21 daily inbound flights from London Heathrow from 9 different airlines.

  • Can I find flights from London Heathrow Airport to Seattle for under $600 on Cheapflights?

    Yes, there are multiple flights from London Heathrow Airport to Seattle for under $600. The cheapest flight booked recently is on Multiple Airlines for just $582, but on average you can expect to pay $602.

  • Are there nonstop flights from London Heathrow Airport to Seattle for under $600 on Cheapflights?

    Cheapflights has at least 20 direct flights from London Heathrow Airport to Seattle under $600. A good price for a nonstop flight from London Heathrow Airport to Seattle is less than $651.

  • Are there last-minute flights available from London Heathrow Airport to Seattle for under $700?

    There are currently 20+ open flights from London Heathrow Airport to Seattle within the next 7 days for less than $700.

  • What days are nonstop flights available from London Heathrow Airport to Seattle?

    Nonstop flights can be found on the following days: Tuesday.

  • How many flights depart from London Heathrow Airport to Seattle on average per day?

    Travelers can expect 3 flights from London Heathrow Airport to Seattle on average per day.
    Afternoon (Noon - 6pm) - 100% of flight departures

  • How long is the flight from London Heathrow Airport to Seattle?

    For as low as $583, Lufthansa can have you in Seattle from London Heathrow Airport in 9h 55m. Airlines will cover a distance of 4812 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Currently priced at $583, Lufthansa will fly you from London Heathrow Airport to Seattle and back. In addition to Lufthansa, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from British Airways and United Airlines - these airlines can fly you to your destination from $596 and $599, respectively. Users have found that Lufthansa is 17% cheaper than the other options available to this destination.

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

    American Airlines, Finnair and British Airways are the most popular airlines when flying from London Heathrow Airport to Seattle.

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

    The top 3 most reliable airlines when flying from London Heathrow Airport to Seattle are Air France (77%), Delta (77%) and Virgin Atlantic (77%).

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

    The cheapest flight price from London Heathrow Airport to Seattle is $668. On average you can expect to pay $3,212. The most popular route, (London Heathrow - Seattle/Tacoma Intl), can usually be booked for $583.

  • What does LHR to SEA mean?

    LHR and SEA are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. LHR to SEA refers to a flight route from London Heathrow Airport to Seattle/Tacoma Intl Airport.

  • 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 vacation 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 5/14.

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Alternative routes for Heathrow to Seattle
See prices for flight routes from nearby airports that may be better suited for you.

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Top 9 airlines flying from Heathrow to Seattle

Discover the top 9 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 2,632,958 searches. Data last updated May 14, 2024.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$505Average$795FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest$532Average$819FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest$532Average$734FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Virgin AtlanticCheapest$537Average$770FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
DeltaCheapest$568Average$759FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapest$585Average$654FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
FinnairCheapest$611Average$751FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IberiaCheapest$618Average$756FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Aer LingusCheapest$670Average$831FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus 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 May 14, 2024.
1%of flight departuresEarly morningMidnight to 6 am
52%of flight departuresMorning6 am to noon
47%of flight departuresAfternoonNoon to 6 pm
0%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
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 May 14, 2024.
Sunday20daily flights
Monday20daily flights
Tuesday24daily flights
Wednesday20daily flights
Thursday20daily flights
Friday20daily flights
Saturday25daily flights

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Cheapflights helps you search for flights from Heathrow to Seattle via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to Seattle for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Heathrow to Seattle, users can toggle the no change fees filter when performing a flight search.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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