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Cheap flights from Seattle (SEA) to Heathrow (LHR) from $252

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 9/29. 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 27 — Jun 31
From?
To?
Mon 5/27
Mon 6/3
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 22, 2024.

Popular in

June

Cheapest in

January

Round-trip from

$643

One-way from

$353
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 55% 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 $860. You can even find prices in November for less than $860, 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 22% versus a flight in the morning.

Cheap Virgin Atlantic flights from Seattle to Heathrow

Explore cheap flight options specifically provided by Virgin Atlantic 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 2,730,072 searches. Data last updated May 22, 2024.
Take a peek at the cheapest Virgin Atlantic flights we've detected traveling from Seattle to London. Make sure to check back often as deals are often changing.
Mon 8/199:15 pmSEA - LHR
Nonstop9h 35mVirgin Atlantic
Mon 9/24:50 pmLHR - SEA
Nonstop10h 30mVirgin Atlantic
Deal found 5/21$744
Tue 8/64:30 pmSEA - LHR
Nonstop9h 20mVirgin Atlantic
Tue 8/208:55 pmLHR - SEA
1 stop21h 20mVirgin Atlantic
Deal found 5/20$768
Sun 8/119:15 pmSEA - LHR
Nonstop9h 35mVirgin Atlantic
Sun 8/258:55 pmLHR - SEA
1 stop21h 20mVirgin Atlantic
Deal found 5/21$818
Tue 5/2810:56 pmSEA - LHR
1 stop13h 14mVirgin Atlantic
Sat 6/84:50 pmLHR - SEA
Nonstop10h 20mVirgin Atlantic
Deal found 5/20$2,828

  • If you’re traveling from Seattle to London Heathrow Airport, one of the more common airlines traveling that route is Virgin Atlantic. Flights from Virgin Atlantic traveling this route typically cost $969.38 RT. This price is typically 77% more expensive than other airlines that offer Seattle to London Heathrow Airport flights. When booking this route, the cheapest RT price found 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, Virgin Atlantic flights are 5% more popular than any other airline flying that same route.

Cheap American Airlines flights from Seattle to Heathrow

Explore cheap flight options specifically provided by American Airlines 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 2,730,072 searches. Data last updated May 22, 2024.
Some of the best deals we've found on American Airlines flights traveling from Seattle to London. Make sure to examine the flight information before completing your reservation.
Tue 8/209:06 amSEA - LHR
1 stop14h 24mAmerican Airlines
Sun 9/84:00 pmLHR - SEA
Nonstop9h 45mAmerican Airlines
Deal found 5/21$748
Mon 6/245:53 amSEA - LHR
1 stop17h 47mAmerican Airlines
Fri 8/309:50 amLHR - SEA
Nonstop9h 45mAmerican Airlines
Deal found 5/21$858
Thu 7/41:30 pmSEA - LHR
Nonstop9h 20mAmerican Airlines
Fri 8/303:15 pmLHR - SEA
1 stop15h 42mAmerican Airlines
Deal found 5/20$912
Wed 5/296:00 amSEA - LHR
1 stop17h 30mAmerican Airlines
Wed 6/54:00 pmLHR - SEA
Nonstop9h 45mAmerican Airlines
Deal found 5/22$1,639
Thu 5/3011:59 pmSEA - LHR
1 stop26h 21mAmerican Airlines
Sun 6/28:50 amLHR - SEA
2 stops21h 00mAmerican Airlines
Deal found 5/22$1,723
Thu 5/307:40 pmSEA - LHR
Nonstop9h 20mAmerican Airlines
Sun 6/99:15 amLHR - SEA
1 stop18h 12mAmerican Airlines
Deal found 5/21$1,743
Wed 5/297:40 pmSEA - LHR
Nonstop9h 20mAmerican Airlines
Sun 6/99:45 amLHR - SEA
Nonstop9h 45mAmerican Airlines
Deal found 5/21$2,964

  • If you’re traveling from Seattle to London Heathrow Airport, one of the more common airlines traveling that route is American Airlines. Flights from American Airlines traveling this route typically cost $1,262.15 RT. This price is typically 59% more expensive than other airlines that offer Seattle to London Heathrow Airport flights. When booking this route, the cheapest RT price found was $941. 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, American Airlines 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 2,730,072 searches. Prices were last updated on May 22, 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.
Tue 5/212:25 pmSEA - LHR
1 stop13h 55mMultiple Airlines
Tue 5/288:40 amLHR - SEA
2 stops17h 47mMultiple Airlines
Deal found 5/21$761
Tue 5/2112:50 pmSEA - LHR
1 stop15h 30mUnited Airlines
Tue 6/410:50 amLHR - SEA
1 stop14h 09mUnited Airlines
Deal found 5/21$763
Tue 5/219:10 pmSEA - LHR
Nonstop9h 40mAir France
Tue 5/286:15 amLHR - SEA
1 stop13h 05mAir France
Deal found 5/21$766
Tue 5/215:30 pmSEA - LHR
1 stop15h 00mVirgin Atlantic
Tue 5/286:15 amLHR - SEA
1 stop13h 05mVirgin Atlantic
Deal found 5/21$770
Tue 5/219:10 pmSEA - LHR
Nonstop9h 40mKLM
Fri 5/314:50 pmLHR - SEA
Nonstop10h 30mKLM
Deal found 5/21$773
Tue 5/212:50 pmSEA - LHR
2 stops19h 05mSWISS
Tue 5/288:40 amLHR - SEA
2 stops17h 47mSWISS
Deal found 5/21$778
Tue 5/212:50 pmSEA - LHR
2 stops19h 05mSWISS
Fri 5/318:40 amLHR - SEA
2 stops21h 43mSWISS
Deal found 5/21$788
Mon 6/1711:38 pmSEA - LHR
1 stop13h 07mJetBlue
Tue 9/108:25 amLHR - SEA
1 stop20h 41mJetBlue
Deal found 5/21$812
Mon 6/1711:00 pmSEA - LHR
1 stop13h 20mIcelandair
Wed 9/111:05 pmLHR - SEA
1 stop12h 50mIcelandair
Deal found 5/21$815

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 2,730,072 searches. Data last updated May 22, 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.
Mon 8/199:15 pmSEA - LHR
Nonstop9h 35mVirgin Atlantic
Mon 9/24:50 pmLHR - SEA
Nonstop10h 30mVirgin Atlantic
Deal found 5/21$744
Sat 8/2411:10 pmSEA - LHR
1 stop28h 40mMultiple Airlines
Sun 9/86:30 amLHR - SEA
2 stops16h 00mMultiple Airlines
Deal found 5/20$746
Tue 8/209:06 amSEA - LHR
1 stop14h 24mAmerican Airlines
Sun 9/84:00 pmLHR - SEA
Nonstop9h 45mAmerican Airlines
Deal found 5/21$748
Sun 9/110:40 amSEA - LHR
2 stops17h 10mMultiple Airlines
Sat 9/146:30 amLHR - SEA
2 stops16h 00mMultiple Airlines
Deal found 5/21$749
Sat 9/148:55 amSEA - LHR
2 stops38h 45mUnited Airlines
Sun 12/1511:35 amLHR - SEA
2 stops31h 35mUnited Airlines
Deal found 5/21$750
Sun 9/17:05 pmSEA - LHR
2 stops32h 45mLufthansa
Sun 9/226:30 amLHR - SEA
2 stops16h 00mLufthansa
Deal found 5/21$751
Wed 8/711:00 pmSEA - LHR
1 stop28h 55mIcelandair
Wed 8/211:05 pmLHR - SEA
1 stop12h 35mIcelandair
Deal found 5/20$752
Sun 9/17:40 pmSEA - LHR
Nonstop9h 20mAmerican Airlines
Sun 9/159:15 amLHR - SEA
1 stop17h 47mAmerican Airlines
Deal found 5/21$753
Fri 8/1610:08 amSEA - LHR
1 stop13h 52mIberia
Wed 9/189:50 amLHR - SEA
Nonstop9h 45mIberia
Deal found 5/21$754

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 2,730,072 searches. Data last updated May 22, 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.
Wed 9/251:30 pmSEA - LHR
Nonstop9h 20mIberia
Wed 10/99:50 amLHR - SEA
Nonstop9h 45mIberia
Deal found 5/22$611
Mon 9/304:30 pmSEA - LHR
Nonstop9h 20mDelta
Fri 10/114:50 pmLHR - SEA
Nonstop10h 25mDelta
Deal found 5/22$616
Sun 9/299:15 pmSEA - LHR
Nonstop9h 35mDelta
Thu 10/174:50 pmLHR - SEA
Nonstop10h 25mDelta
Deal found 5/22$617
Sat 9/281:50 pmSEA - LHR
Nonstop9h 20mIberia
Tue 10/89:50 amLHR - SEA
Nonstop9h 45mIberia
Deal found 5/21$665
Sat 9/281:50 pmSEA - LHR
Nonstop9h 20mBritish Airways
Thu 10/109:45 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/22$666
Sat 9/281:50 pmSEA - LHR
Nonstop9h 20mBritish Airways
Fri 10/189:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/21$667
Tue 10/11:30 pmSEA - LHR
Nonstop9h 20mBritish Airways
Sun 10/139:45 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/22$686
Mon 9/169:15 pmSEA - LHR
Nonstop9h 35mKLM
Thu 10/174:50 pmLHR - SEA
Nonstop10h 25mKLM
Deal found 5/22$693
Mon 9/21:30 pmSEA - LHR
Nonstop9h 20mBritish Airways
Wed 9/189:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/20$694

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 2,730,072 searches. Data last updated May 22, 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.
Tue 5/281:50 pmSEA - LHR
1 stop14h 15mMultiple Airlines
Tue 6/47:05 amLHR - SEA
3 stops33h 27mMultiple Airlines
Deal found 5/21$914
Tue 5/285:50 amSEA - LHR
3 stops20h 10mMultiple Airlines
Tue 6/47:05 amLHR - SEA
3 stops33h 27mMultiple Airlines
Deal found 5/21$916
Tue 5/281:50 pmSEA - LHR
2 stops16h 05mMultiple Airlines
Tue 6/47:05 amLHR - SEA
3 stops33h 27mMultiple Airlines
Deal found 5/21$919
Tue 5/281:50 pmSEA - LHR
3 stops20h 40mMultiple Airlines
Tue 6/49:05 pmLHR - SEA
3 stops31h 30mMultiple Airlines
Deal found 5/21$943
Tue 5/281:50 pmSEA - LHR
2 stops23h 45mMultiple Airlines
Tue 6/49:05 pmLHR - SEA
3 stops31h 30mMultiple Airlines
Deal found 5/21$952
Tue 5/281:50 pmSEA - LHR
1 stop14h 15mMultiple Airlines
Tue 6/49:05 pmLHR - SEA
3 stops31h 30mMultiple Airlines
Deal found 5/21$963
Tue 5/281:50 pmSEA - LHR
1 stop14h 15mMultiple Airlines
Tue 6/48:15 pmLHR - SEA
2 stops32h 20mMultiple Airlines
Deal found 5/21$995
Mon 5/2711:25 amSEA - LHR
2 stops20h 15mMultiple Airlines
Thu 5/309:30 amLHR - SEA
2 stops22h 14mMultiple Airlines
Deal found 5/21$1,010
Wed 5/298:40 pmSEA - LHR
2 stops16h 05mJetBlue
Wed 6/511:55 amLHR - SEA
1 stop18h 54mJetBlue
Deal found 5/22$1,029

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 2,730,072 searches. Data last updated May 22, 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.
Sun 9/296:55 pmSEA - LHR
1 stop33h 00mIcelandair
Deal found 5/21$252
Mon 9/306:55 pmSEA - LHR
1 stop17h 25mIcelandair
Deal found 5/21$255
Sun 9/226:55 pmSEA - LHR
1 stop17h 25mIcelandair
Deal found 5/21$257
Sun 9/293:50 pmSEA - LHR
1 stop20h 30mIcelandair
Deal found 5/21$263
Wed 11/62:35 pmSEA - LHR
1 stop20h 45mIcelandair
Deal found 5/21$287
Wed 10/23:50 pmSEA - LHR
1 stop12h 05mIcelandair
Deal found 5/21$292
Sat 11/92:35 pmSEA - LHR
1 stop12h 20mIcelandair
Deal found 5/21$301
Tue 7/237:00 amSEA - LHR
2 stops42h 15mMultiple Airlines
Deal found 5/21$304
Thu 9/196:55 pmSEA - LHR
1 stop33h 00mIcelandair
Deal found 5/21$308

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 2,730,072 searches. Data last updated May 22, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$744 - $771

Route

Depart

Return

Price

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 8/19

Nonstop9h 35m

London Heathrow

Mon 9/2

Nonstop10h 30m

$744

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 8/20

1 stop14h 24m

London Heathrow

Sun 9/8

Nonstop9h 45m

$748

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 8/6

1 stop12h 25m

London Heathrow

Sat 8/31

Nonstop10h 25m

$749

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sat 8/17

2 stops36h 27m

London Heathrow

Sun 9/1

1 stop34h 21m

$750

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 8/7

1 stop28h 55m

London Heathrow

Wed 8/21

1 stop12h 35m

$752

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Fri 8/16

1 stop13h 52m

London Heathrow

Wed 9/18

Nonstop9h 45m

$754

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 8/20

1 stop22h 45m

London Heathrow

Sat 8/31

1 stop15h 35m

$759

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Thu 7/11

2 stops15h 20m

London Heathrow

Thu 10/3

2 stops16h 00m

$763

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 8/19

1 stop14h 25m

London Heathrow

Mon 8/26

2 stops29h 29m

$771

Flights are sorted by cheapest first

Deals found on 5/21

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 10, 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.
Search Deals

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 19, 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.
Search Deals

Best time to book a flight from Seattle to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Seattle with our price prediction graph.
Estimated round-trip 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 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 22, 2024.
Peruse reviews from past customers who have flown with Virgin Atlantic, American Airlines and KLM 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
8.0
Very good
10,585 reviews
Check prices

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

8.0

Food

7.4

Entertainment

8.0

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
8.0
Very good
10,585 reviews
Delta
8.0
Very good
10,585 reviews
Check prices

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

8.0

Food

7.4

Entertainment

8.0

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
1,555 reviews
Delta
8.0
Very good
10,585 reviews
Check prices

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

8.0

Food

7.4

Entertainment

8.0

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
1,967 reviews
Delta
8.0
Very good
10,585 reviews
Check prices

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

8.0

Food

7.4

Entertainment

8.0

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.

Finnair
7.8
Good
1,370 reviews
Delta
8.0
Very good
10,585 reviews
Check prices

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

8.0

Food

7.4

Entertainment

8.0

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
730 reviews
Delta
8.0
Very good
10,585 reviews
Check prices

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

8.0

Food

7.4

Entertainment

8.0

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 $800 on Cheapflights?

    Yes, there are multiple flights from Seattle to London Heathrow Airport for under $800. The cheapest flight booked recently is on Virgin Atlantic for just $744, but on average you can expect to pay $760.

  • 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 $699.

  • Are there last-minute flights available from Seattle to London Heathrow Airport for under $1,000?

    There are currently 20+ open flights from Seattle to London Heathrow Airport within the next 7 days for less than $1,000.

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

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

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

    3 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 $744, Virgin Atlantic can have you in London Heathrow Airport from Seattle in 9h 35m. 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 Virgin Atlantic. Our recent data shows that you can find tickets from as low as $744 on this airline. Additional options worth looking into are American Airlines and KLM, starting at $748 and $749 round-trip. Virgin Atlantic is currently priced 15% below the average price you’ll pay for this route.

  • 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 American Airlines (71%), Aer Lingus (71%) or Finnair (71%) 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 $3,223, our data indicates the cheapest price to be $487. The most popular route (Seattle/Tacoma Intl - London Heathrow), is priced around $569.

  • 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 5/22.

  • 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.

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

    Currently, November is the cheapest month in which you can book a flight from Seattle to London Heathrow Airport (average of $652). Flying from Seattle to London Heathrow Airport in June is currently the most expensive (average of $1,138). 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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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 2,730,072 searches. Data last updated May 22, 2024.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$402Average$702FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest$519Average$702FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest$557Average$833FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
FinnairCheapest$572Average$940FlexibilityNo cancel feeOn-time76%
Search Finnair flights
United AirlinesCheapest$575Average$921FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IberiaCheapest$582Average$834FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Air FranceCheapest$588Average$878FlexibilityNo cancel feeOn-time77%
Search Air France flights
American AirlinesCheapest$598Average$962FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapest$604Average$902FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
British AirwaysCheapest$623Average$956FlexibilityNo 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 22, 2024.
1%of flight departuresEarly morningMidnight to 6 am
0%of flight departuresMorning6 am to noon
48%of flight departuresAfternoonNoon to 6 pm
51%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 22, 2024.
Sunday20daily flights
Monday20daily flights
Tuesday15daily flights
Wednesday20daily flights
Thursday20daily flights
Friday20daily flights
Saturday20daily flights

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

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.

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

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!

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

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

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

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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