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Cheap flights from Seattle (SEA) to Heathrow (LHR) from $232

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 5/27. 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.
SEA — LHR
May 13 — May 201
From?
To?
Mon 5/13
Mon 5/20
1 adult, Economy
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The best prices from Seattle/Tacoma Intl to London Heathrow are usually found in January or February, booked 75 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Seattle to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Heathrow (LHR). 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 8, 2024.

Popular in

June

Cheapest in

January

Round-trip from

$643

One-way from

$232
High demand for flights, 28% potential price rise
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Best time to find cheap flights, 20% potential price drop
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From Seattle/Tacoma Intl to London Heathrow
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One-way flight from Seattle/Tacoma Intl to London Heathrow
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What is the cheapest day to fly round-trip from Seattle to London Heathrow Airport?

Departing on a Tuesday is a good option for securing a great price. You can expect to save up to 14% when planning your travel around this day of the week.

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

To save up to 65% on this flight, we recommend booking at least 8 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Seattle to London Heathrow Airport from $646 1-2 weeks out and tickets from $1,159 for flights departing within the next 72 hours.

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

The best pricing can be found in the month of November. Prices to London Heathrow Airport from Seattle average $861. You can even find prices in November for less than $861, as users have found deals to London Heathrow Airport from as low as $560. The month of June appears to be one of the more expensive times to travel to London Heathrow Airport from Seattle. Flying in the targeted month can save you up to 39%.

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

When flying from Seattle to London Heathrow Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 20% versus a flight in the morning.

Cheap Icelandair flights from Seattle to Heathrow

Explore cheap flight options specifically provided by Icelandair for the route between Seattle and Heathrow. 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 2,752,338 searches. Data last updated May 8, 2024.
Take a peek at the cheapest Icelandair flights we've detected traveling from Seattle to London. Make sure to check back often as deals are often changing.
Sun 10/203:50 pmSEA - LHR
1 stop12h 05mIcelandair
Thu 10/318:25 pmLHR - SEA
1 stop28h 35mIcelandair
Deal found 5/8$570
Tue 10/83:50 pmSEA - LHR
1 stop12h 05mIcelandair
Tue 10/229:25 pmLHR - SEA
1 stop28h 30mIcelandair
Deal found 5/8$574
Mon 10/143:50 pmSEA - LHR
1 stop20h 30mIcelandair
Mon 10/219:25 pmLHR - SEA
1 stop28h 30mIcelandair
Deal found 5/6$578
Wed 10/233:50 pmSEA - LHR
1 stop12h 05mIcelandair
Thu 11/78:25 pmLHR - SEA
1 stop28h 35mIcelandair
Deal found 5/7$579
Tue 10/223:50 pmSEA - LHR
1 stop12h 05mIcelandair
Mon 11/48:25 pmLHR - SEA
1 stop28h 35mIcelandair
Deal found 5/6$581
Sun 10/66:55 pmSEA - LHR
1 stop17h 25mIcelandair
Mon 10/149:25 pmLHR - SEA
1 stop28h 30mIcelandair
Deal found 5/6$587
Wed 10/93:50 pmSEA - LHR
1 stop20h 30mIcelandair
Wed 10/169:25 pmLHR - SEA
1 stop28h 30mIcelandair
Deal found 5/7$589
Wed 10/233:50 pmSEA - LHR
1 stop12h 05mIcelandair
Wed 10/308:25 pmLHR - SEA
1 stop28h 35mIcelandair
Deal found 5/6$594
Tue 10/16:55 pmSEA - LHR
1 stop17h 25mIcelandair
Tue 10/159:25 pmLHR - SEA
1 stop28h 30mIcelandair
Deal found 5/7$604

  • One of the most popular airlines traveling from Seattle to London Heathrow Airport is Icelandair. Seattle to London Heathrow Airport flights are typically 58% cheaper than other airlines traveling the same route. Flights from Icelandair typically cost $983.80 RT. The cheapest Icelandair flight found for this route was $637. The most popular departure airport in Seattle when flying to London Heathrow Airport is Seattle/Tacoma Intl Airport. The most popular airport to fly into when visiting London Heathrow Airport is London Heathrow Airport. When flying from Seattle to London Heathrow Airport, Icelandair flights are 5% more popular than any other airline flying that same route.

Cheap British Airways flights from Seattle to Heathrow

Explore cheap flight options specifically provided by British Airways for the route between Seattle and Heathrow. 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 2,752,338 searches. Data last updated May 8, 2024.
Some of the best deals we've found on British Airways flights traveling from Seattle to London. Make sure to examine the flight information before completing your reservation.
Sun 10/207:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Thu 10/312:50 pmLHR - SEA
Nonstop9h 55mBritish Airways
Deal found 5/8$611
Tue 9/247:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Wed 10/99:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/8$624
Tue 9/241:58 pmSEA - LHR
1 stop14h 47mBritish Airways
Wed 10/99:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/7$647
Wed 7/241:30 pmSEA - LHR
Nonstop9h 20mBritish Airways
Wed 8/289:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/7$678
Fri 9/207:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Fri 9/279:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/7$684
Wed 9/111:30 pmSEA - LHR
Nonstop9h 20mBritish Airways
Fri 9/279:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/7$693
Wed 8/141:30 pmSEA - LHR
Nonstop9h 20mBritish Airways
Wed 9/41:40 pmLHR - SEA
1 stop15h 53mBritish Airways
Deal found 5/7$703
Sun 9/87:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Tue 9/249:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/7$707
Tue 9/31:30 pmSEA - LHR
Nonstop9h 20mBritish Airways
Tue 9/249:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/7$721

  • British Airways is one of the most popular airlines used for those traveling from Seattle to London Heathrow Airport. Flights on this route from British Airways typically cost $1,255.15 RT, a price that is 49% more expensive than the average Seattle to London Heathrow Airport flight. The cheapest flight found was $944 RT. The most popular departure airport in Seattle when flying to London Heathrow Airport is Seattle/Tacoma Intl Airport. The most popular airport to fly into when visiting London Heathrow Airport is London Heathrow Airport. When flying from Seattle to London Heathrow Airport, British Airways flights are 5% more popular than any other airline flying that same route.

Cheap Seattle to Heathrow flights in May & June 2024

Find cheap flight options from Seattle to Heathrow specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,752,338 searches. Prices were last updated on May 8, 2024.
Listed are some of the best fares we've found on flights departing from Seattle to London in 2024. More deals are always being added, so be sure to check back regularly.
Sun 5/124:30 pmSEA - LHR
Nonstop9h 20mVirgin Atlantic
Tue 5/286:15 amLHR - SEA
1 stop13h 05mVirgin Atlantic
Deal found 5/7$751
Sun 5/1910:40 amSEA - LHR
2 stops15h 20mMultiple Airlines
Thu 6/68:40 amLHR - SEA
2 stops17h 47mMultiple Airlines
Deal found 5/7$754
Tue 5/2110:40 amSEA - LHR
1 stop18h 40mLufthansa
Tue 6/410:50 amLHR - SEA
1 stop14h 09mLufthansa
Deal found 5/7$756
Sun 5/1910:40 amSEA - LHR
1 stop18h 40mLufthansa
Tue 6/119:00 amLHR - SEA
1 stop15h 59mLufthansa
Deal found 5/7$757
Sun 5/124:30 pmSEA - LHR
Nonstop9h 20mVirgin Atlantic
Tue 5/286:15 amLHR - SEA
1 stop13h 05mVirgin Atlantic
Deal found 5/8$760
Wed 5/158:20 amSEA - LHR
1 stop20h 00mUnited Airlines
Fri 5/319:00 amLHR - SEA
1 stop15h 59mUnited Airlines
Deal found 5/7$761
Sun 5/1211:45 pmSEA - LHR
1 stop22h 10mUnited Airlines
Tue 5/289:00 amLHR - SEA
2 stops21h 50mUnited Airlines
Deal found 5/8$763
Mon 5/203:10 pmSEA - LHR
1 stop14h 10mLufthansa
Wed 6/56:30 amLHR - SEA
2 stops15h 57mLufthansa
Deal found 5/7$764
Mon 5/203:10 pmSEA - LHR
1 stop14h 10mLufthansa
Tue 6/189:00 amLHR - SEA
1 stop15h 59mLufthansa
Deal found 5/7$765

Seattle to Heathrow 2024 flight deals

Discover exclusive flight deals for travel between Seattle and Heathrow in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,752,338 searches. Data last updated May 8, 2024.
Listed are some of the best fares we've found on flights departing from Seattle to London in 2024. More deals are always being added, so be sure to check back regularly.
Wed 10/2310:40 amSEA - LHR
2 stops17h 10mAir Canada
Wed 11/62:30 pmLHR - SEA
1 stop15h 26mAir Canada
Deal found 5/7$640
Tue 10/810:40 amSEA - LHR
2 stops17h 10mLufthansa
Wed 10/167:25 amLHR - SEA
2 stops22h 55mLufthansa
Deal found 5/6$641
Wed 10/233:10 pmSEA - LHR
1 stop14h 10mLufthansa
Tue 11/511:10 amLHR - SEA
1 stop13h 55mLufthansa
Deal found 5/7$642
Thu 9/511:00 pmSEA - LHR
1 stop28h 55mIcelandair
Fri 9/201:05 pmLHR - SEA
1 stop15h 30mIcelandair
Deal found 5/6$643
Tue 9/241:58 pmSEA - LHR
1 stop14h 47mBritish Airways
Wed 10/99:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/7$647
Tue 9/247:40 amSEA - LHR
1 stop14h 50mMultiple Airlines
Wed 10/96:30 amLHR - SEA
2 stops16h 00mMultiple Airlines
Deal found 5/7$648
Tue 10/2210:40 amSEA - LHR
2 stops17h 10mLufthansa
Mon 11/47:15 pmLHR - SEA
1 stop29h 50mLufthansa
Deal found 5/6$649
Wed 10/234:30 pmSEA - LHR
Nonstop9h 20mVirgin Atlantic
Wed 10/308:25 pmLHR - SEA
1 stop21h 50mVirgin Atlantic
Deal found 5/6$650
Tue 10/87:40 amSEA - LHR
1 stop14h 50mUnited Airlines
Wed 10/1610:50 amLHR - SEA
2 stops20h 15mUnited Airlines
Deal found 5/6$651

Non-stop flights to Heathrow from Seattle

Discover non-stop flight options from Seattle to Heathrow. 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 2,752,338 searches. Data last updated May 8, 2024.
To help reduce your travel time, choose from one of these non-stop flights from Seattle to London. Search for alternative flights from Seattle to London by utilizing the search form above.
Sun 10/207:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Thu 10/312:50 pmLHR - SEA
Nonstop9h 55mBritish Airways
Deal found 5/8$611
Tue 10/87:40 pmSEA - LHR
Nonstop9h 20mIberia
Tue 10/229:50 amLHR - SEA
Nonstop9h 45mIberia
Deal found 5/8$615
Tue 9/247:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Wed 10/99:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/8$624
Wed 10/234:30 pmSEA - LHR
Nonstop9h 20mVirgin Atlantic
Wed 11/64:35 pmLHR - SEA
Nonstop10h 25mVirgin Atlantic
Deal found 5/7$632
Wed 9/257:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Wed 10/94:00 pmLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/7$638
Tue 9/241:30 pmSEA - LHR
Nonstop9h 20mBritish Airways
Fri 10/49:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/8$643
Tue 10/19:10 pmSEA - LHR
Nonstop9h 40mKLM
Tue 10/154:50 pmLHR - SEA
Nonstop10h 25mKLM
Deal found 5/6$654
Tue 9/249:15 pmSEA - LHR
Nonstop9h 35mKLM
Wed 10/94:50 pmLHR - SEA
Nonstop10h 25mKLM
Deal found 5/7$655
Tue 10/229:10 pmSEA - LHR
Nonstop9h 40mKLM
Tue 11/54:35 pmLHR - SEA
Nonstop10h 25mKLM
Deal found 5/7$656

Seattle to Heathrow flights leaving soon

Find last-minute flight options from Seattle to Heathrow 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 2,752,338 searches. Data last updated May 8, 2024.
Have a look at some of the flights available from Seattle to London departing last-minute. It's wise to confirm all flight details are correct before booking.
Sun 5/124:30 pmSEA - LHR
Nonstop9h 20mVirgin Atlantic
Tue 5/286:15 amLHR - SEA
1 stop13h 05mVirgin Atlantic
Deal found 5/7$751
Sun 5/1910:40 amSEA - LHR
2 stops15h 20mMultiple Airlines
Thu 6/68:40 amLHR - SEA
2 stops17h 47mMultiple Airlines
Deal found 5/7$754
Tue 5/2110:40 amSEA - LHR
1 stop18h 40mLufthansa
Tue 6/410:50 amLHR - SEA
1 stop14h 09mLufthansa
Deal found 5/7$756
Sun 5/1910:40 amSEA - LHR
1 stop18h 40mLufthansa
Tue 6/119:00 amLHR - SEA
1 stop15h 59mLufthansa
Deal found 5/7$757
Sun 5/124:30 pmSEA - LHR
Nonstop9h 20mVirgin Atlantic
Tue 5/286:15 amLHR - SEA
1 stop13h 05mVirgin Atlantic
Deal found 5/8$760
Wed 5/158:20 amSEA - LHR
1 stop20h 00mUnited Airlines
Fri 5/319:00 amLHR - SEA
1 stop15h 59mUnited Airlines
Deal found 5/7$761
Wed 5/156:38 amSEA - LHR
2 stops21h 07mUnited Airlines
Fri 5/317:25 amLHR - SEA
1 stop17h 34mUnited Airlines
Deal found 5/8$762
Sun 5/1211:45 pmSEA - LHR
1 stop22h 10mUnited Airlines
Tue 5/289:00 amLHR - SEA
2 stops21h 50mUnited Airlines
Deal found 5/8$763
Mon 5/203:10 pmSEA - LHR
1 stop14h 10mLufthansa
Wed 6/56:30 amLHR - SEA
2 stops15h 57mLufthansa
Deal found 5/7$764

One-way flights to Heathrow from Seattle

Search for one-way flight options from Seattle to Heathrow. 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 2,752,338 searches. Data last updated May 8, 2024.
Some of the best available deals we've found on one-way flights from Seattle to London. Those seeking round-trip flights from Seattle to London should utilize the search form at the the top of the page.
Mon 5/277:00 amSEA - LHR
1 stop21h 05mWestJet
Deal found 5/7$232
Mon 10/73:50 pmSEA - LHR
1 stop12h 05mIcelandair
Deal found 5/7$249
Mon 9/306:55 pmSEA - LHR
1 stop17h 25mIcelandair
Deal found 5/7$250
Mon 10/143:50 pmSEA - LHR
1 stop12h 05mIcelandair
Deal found 5/7$255
Sun 9/226:55 pmSEA - LHR
1 stop17h 25mIcelandair
Deal found 5/6$256
Sun 10/133:50 pmSEA - LHR
1 stop20h 30mIcelandair
Deal found 5/7$263
Tue 10/16:55 pmSEA - LHR
1 stop33h 00mIcelandair
Deal found 5/6$269
Fri 10/183:50 pmSEA - LHR
1 stop20h 30mIcelandair
Deal found 5/7$297
Fri 10/183:50 pmSEA - LHR
1 stop12h 05mIcelandair
Deal found 5/6$300

Find flights from Seattle to Heathrow within your budget

Customize your flight search to find flights from Seattle to Heathrow 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 2,752,338 searches. Data last updated May 8, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$570 - $648

Route

Depart

Return

Price

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 10/20

1 stop12h 05m

London Heathrow

Thu 10/31

1 stop28h 35m

$570

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 10/20

Nonstop9h 20m

London Heathrow

Thu 10/31

Nonstop9h 55m

$611

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 10/8

Nonstop9h 20m

London Heathrow

Tue 10/22

Nonstop9h 45m

$615

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 9/24

1 stop14h 25m

London Heathrow

Wed 10/2

Nonstop9h 45m

$618

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 10/23

Nonstop9h 20m

London Heathrow

Wed 11/6

1 stop14h 00m

$625

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 10/20

2 stops17h 10m

London Heathrow

Thu 10/31

1 stop18h 30m

$630

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 10/1

2 stops16h 40m

London Heathrow

Tue 10/15

2 stops17h 46m

$638

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 10/22

2 stops18h 57m

London Heathrow

Tue 11/5

1 stop13h 55m

$645

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 9/24

1 stop14h 50m

London Heathrow

Wed 10/9

2 stops16h 00m

$648

Flights are sorted by cheapest first

Deals found on 5/8

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Heathrow. Price data was last updated on May 3, 2024.
Booking 75 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
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When is the cheapest time to fly from Seattle to London Heathrow Airport?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Heathrow. Price data was last updated on May 5, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Seattle to London Heathrow Airport flight should consider departing on Sunday at noon when fares are most often at their lowest. Thursday mornings 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 Heathrow by month

Plan your trip from Seattle to Heathrow by taking into account the cheapest months to travel. The average price of a one-way flight from Seattle to Heathrow is currently $263 while a round-trip flight costs $622. Price data was last updated on May 5, 2024.

Currently, November is the cheapest month in which you can book a flight from Seattle to London Heathrow Airport (average of $653). Flying from Seattle to London Heathrow Airport in June is currently the most expensive (average of $1,158). 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

$673

February

$663

March

$715

April

$692

May

$735

June

$1,158

July

$980

August

$776

September

$743

October

$710

November

$653

December

$671

Temperature and rainfall in Heathrow by month

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

LON

Temperature

39.2 - 62.6 °F

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated May 8, 2024.
Peruse reviews from past customers who have flown with Icelandair, British Airways and Iberia from Seattle to London to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.1
Very good
10,789 reviews
Check prices

Crew

8.6

Entertainment

8.0

Food

7.4

Boarding

8.2

Overall

8.1

Comfort

7.9

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Delta
8.1
Very good
10,789 reviews
Delta
8.1
Very good
10,789 reviews
Check prices

Crew

8.6

Entertainment

8.0

Food

7.4

Boarding

8.2

Overall

8.1

Comfort

7.9

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

KLM
7.9
Good
1,592 reviews
Delta
8.1
Very good
10,789 reviews
Check prices

Crew

8.6

Entertainment

8.0

Food

7.4

Boarding

8.2

Overall

8.1

Comfort

7.9

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

SWISS
7.8
Good
2,013 reviews
Delta
8.1
Very good
10,789 reviews
Check prices

Crew

8.6

Entertainment

8.0

Food

7.4

Boarding

8.2

Overall

8.1

Comfort

7.9

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Virgin Atlantic
7.7
Good
739 reviews
Delta
8.1
Very good
10,789 reviews
Check prices

Crew

8.6

Entertainment

8.0

Food

7.4

Boarding

8.2

Overall

8.1

Comfort

7.9

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Air France
7.5
Good
1,777 reviews
Delta
8.1
Very good
10,789 reviews
Check prices

Crew

8.6

Entertainment

8.0

Food

7.4

Boarding

8.2

Overall

8.1

Comfort

7.9

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Heathrow. 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 from for flights from Seattle to London Heathrow?

    Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to London Heathrow. You should not have trouble finding flights to London Heathrow from Seattle/Tacoma Intl; the airport handles an average of 19 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 16 airlines have flights from the Seattle airport to London Heathrow. It is only a 11.4 mi journey to Seattle/Tacoma Intl (SEA) from Seattle’s city center.

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

    Yes, there are multiple flights from Seattle to London Heathrow Airport for under $600. The cheapest flight booked recently is on Icelandair for just $570, but on average you can expect to pay $600.

  • Are there nonstop flights from Seattle to London Heathrow Airport for under $700 on Cheapflights?

    Cheapflights has at least 20 direct flights from Seattle to London Heathrow Airport under $700. A good price for a nonstop flight from Seattle to London Heathrow Airport is less than $667.

  • Are there last-minute flights available from Seattle to London Heathrow Airport for under $800?

    There are currently 20+ open flights from Seattle to London Heathrow Airport within the next 7 days for less than $800.

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

    Days when nonstop flights are available for this flight are: Friday, Saturday.

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

    2 flight departures from Seattle to London Heathrow Airport per day on average.
    Afternoon (Noon - 6pm) - 100% of flight departures

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

    For as low as $570, Icelandair can have you in London Heathrow Airport from Seattle in 9h 20m. The distance between Seattle and London Heathrow Airport is about 4812 mi. This flight may include one or multiple stops.

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

    Our cheapest airline available from Seattle to London Heathrow Airport is Icelandair. Our recent data shows that you can find tickets from as low as $570 on this airline. Additional options worth looking into are British Airways and Iberia, starting at $611 and $615 round-trip. Icelandair is currently priced 35% below the average price you’ll pay for this route.

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

    Before booking your flight from Seattle to London Heathrow Airport check out the most popular airlines for this route: American Airlines, Air Canada or Air France.

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

    No one likes to see their flight delayed. When booking a flight from Seattle to London Heathrow Airport consider choosing Air France (74%), Delta (74%) or KLM (74%) as they are the most reliable in getting you off to your destination on time.

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

    Looking for the cheapest flight from Seattle to London Heathrow Airport? While on average our users pay $3,035, our data indicates the cheapest price to be $476. The most popular route (Seattle/Tacoma Intl - London Heathrow), is priced around $594.

  • What does SEA to LHR mean?

    SEA stands for Seattle/Tacoma Intl Airport, while LHR stands for London Heathrow Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.

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

    The amount of baggage you can bring on your Seattle to Heathrow 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 Seattle to Heathrow with specific airlines?

    Yes, Cheapflights allows you to browse and filter Seattle to Heathrow 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 Seattle to Heathrow that include hotel bookings?

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Heathrow 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 Seattle to Heathrow that allow pets onboard?

    Many airlines flying from Seattle to Heathrow 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 Seattle to Heathrow?

    Yes, you can often find last-minute deals on Seattle to Heathrow 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 Seattle to London Heathrow Airport flight deals updated?

    The Seattle to London Heathrow Airport flight deals you see on this page were last updated on 5/7.

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

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Top 10 airlines flying from Seattle to Heathrow

Discover the top 10 airlines that operate flights from Seattle to Heathrow. 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 2,752,338 searches. Data last updated May 8, 2024.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$402Average$702FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest$519Average$703FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest$558Average$845FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
FinnairCheapest$572Average$942FlexibilityNo cancel feeOn-time76%
Search Finnair flights
United AirlinesCheapest$575Average$890FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IberiaCheapest$583Average$843FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Air FranceCheapest$588Average$878FlexibilityNo cancel feeOn-time77%
Search Air France flights
American AirlinesCheapest$599Average$973FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapest$604Average$902FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
British AirwaysCheapest$627Average$959FlexibilityNo cancel feeOn-time70%
Search British Airways flights
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Search flights from Seattle to Heathrow by cabin class

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

Find hourly flight availability from Seattle to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 8, 2024.
1%of flight departuresEarly morningMidnight to 6 am
0%of flight departuresMorning6 am to noon
52%of flight departuresAfternoonNoon to 6 pm
47%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Seattle to Heathrow

Explore weekly flight availability from Seattle to Heathrow. 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 8, 2024.
Sunday20daily flights
Monday20daily flights
Tuesday15daily flights
Wednesday20daily flights
Thursday20daily flights
Friday20daily flights
Saturday20daily flights

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Cheapflights makes it easy to find Seattle to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

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Users can book flights with no change fees policies with our dedicated filters. Book flights from Seattle to Heathrow flexibly with Cheapflights today.

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Of course! You can now track prices for flights from Seattle to Heathrow and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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