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Cheap flights from Seattle (SEA) to London (LON) from $242

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 10/8. 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 — LON
May 2 — May 91
From?
To?
Thu 5/2
Thu 5/9
1 adult, Economy
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The best prices from Seattle/Tacoma Intl to London are usually found in January or February, booked 58 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from Seattle to London

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to London (LON). 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 April 27, 2024.

Popular in

June

Cheapest in

January

Round-trip from

$644

One-way from

$242
High demand for flights, 24% potential price rise
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Best time to find cheap flights, 22% potential price drop
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From Seattle/Tacoma Intl to London (LON)
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One-way flight from Seattle/Tacoma Intl to London (LON)
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What is the cheapest day to fly round-trip from Seattle to London?

Friday flights are found to be more expensive to fly from Seattle to London. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 59 days in advance, which can save you up to 39% on flights from Seattle to London compared to booking the week you need them. Waiting 59 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $866. For sooner than that we have options available in the next 3 days from $1,144.

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

January is one of the best times of the year to fly to London from Seattle. Prices for January average $860 per person but you can even find prices for as low as $462. The most expensive prices can be found in the month of June. Opting for a January flight can save you 32% on your journey compared to booking in June

When is the cheapest time to fly from Seattle to London (SEA - LON)?

One of the essential ways to save on airfare from Seattle to London is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 17% on airfare.

Cheap Icelandair flights from Seattle to London

Explore cheap flight options specifically provided by Icelandair for the route between Seattle and London. 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 3,068,117 searches. Data last updated April 27, 2024.
Peruse some of the lowest-priced Icelandair flights we've found from Seattle to London. Deals update often to give you more flight options matching your criteria
Sun 9/226:55 pmSEA - LHR
1 stop33h 00mIcelandair
Mon 10/79:25 pmLHR - SEA
1 stop28h 30mIcelandair
Deal found 4/26$592
Tue 10/223:50 pmSEA - LGW
1 stop11h 55mIcelandair
Tue 10/2912:00 pmLGW - SEA
1 stop13h 00mIcelandair
Deal found 4/25$603
Tue 10/153:50 pmSEA - LGW
1 stop11h 55mIcelandair
Tue 10/2912:00 pmLGW - SEA
1 stop13h 00mIcelandair
Deal found 4/26$604
Wed 10/93:50 pmSEA - LHR
1 stop20h 30mIcelandair
Tue 11/1212:15 pmLHR - SEA
1 stop12h 45mIcelandair
Deal found 4/26$606
Mon 10/73:50 pmSEA - LHR
1 stop20h 30mIcelandair
Mon 10/149:25 pmLHR - SEA
1 stop28h 30mIcelandair
Deal found 4/26$607
Sun 10/203:50 pmSEA - LHR
1 stop12h 05mIcelandair
Thu 10/241:10 pmLHR - SEA
1 stop12h 45mIcelandair
Deal found 4/26$608
Sun 10/203:50 pmSEA - LHR
1 stop20h 30mIcelandair
Mon 10/288:25 pmLHR - SEA
1 stop28h 30mIcelandair
Deal found 4/26$609
Wed 9/253:50 pmSEA - LHR
1 stop12h 05mIcelandair
Wed 10/21:05 pmLHR - SEA
1 stop15h 30mIcelandair
Deal found 4/26$611
Tue 9/246:55 pmSEA - LHR
1 stop17h 25mIcelandair
Wed 10/91:05 pmLHR - SEA
1 stop12h 50mIcelandair
Deal found 4/26$612

  • One of the most popular airlines traveling from Seattle to London is Icelandair. Seattle to London flights are typically 60% cheaper than other airlines traveling the same route. Flights from Icelandair typically cost $985.93 RT. The cheapest Icelandair flight found for this route was $637. The most popular departure airport in Seattle when flying to London is Seattle/Tacoma Intl Airport. The most popular airport to fly into when visiting London is London Heathrow Airport. When flying from Seattle to London, Icelandair flights are 5% more popular than any other airline flying that same route.

Cheap KLM flights from Seattle to London

Explore cheap flight options specifically provided by KLM for the route between Seattle and London. 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 3,068,117 searches. Data last updated April 27, 2024.
Some of the lowest-priced KLM flights we've found at this time heading from Seattle to London. Ensure the flight price, dates, time, and airline match your criteria before you book.
Tue 10/19:10 pmSEA - LHR
Nonstop9h 40mKLM
Wed 10/304:35 pmLHR - SEA
Nonstop10h 25mKLM
Deal found 4/26$653
Fri 9/209:15 pmSEA - LHR
Nonstop9h 35mKLM
Fri 9/2711:45 amLHR - SEA
1 stop13h 05mKLM
Deal found 4/26$699
Tue 10/19:10 pmSEA - LHR
Nonstop9h 40mKLM
Sat 10/124:50 pmLHR - SEA
Nonstop10h 25mKLM
Deal found 4/26$703
Mon 8/269:15 pmSEA - LHR
Nonstop9h 35mKLM
Fri 9/64:50 pmLHR - SEA
Nonstop10h 30mKLM
Deal found 4/25$735
Tue 9/39:15 pmSEA - LHR
Nonstop9h 35mKLM
Tue 10/14:50 pmLHR - SEA
Nonstop10h 25mKLM
Deal found 4/26$736
Fri 9/209:15 pmSEA - LHR
Nonstop9h 35mKLM
Sun 10/64:50 pmLHR - SEA
Nonstop10h 25mKLM
Deal found 4/25$752
Thu 5/21:30 pmSEA - LCY
1 stop12h 00mKLM
Fri 5/109:20 amLCY - SEA
1 stop15h 20mKLM
Deal found 4/26$760
Thu 10/39:10 pmSEA - LHR
Nonstop9h 40mKLM
Sun 10/2010:55 amLHR - SEA
1 stop15h 43mKLM
Deal found 4/26$763
Wed 8/219:15 pmSEA - LHR
Nonstop9h 35mKLM
Sat 8/314:50 pmLHR - SEA
Nonstop10h 25mKLM
Deal found 4/26$771

  • If you’re traveling from Seattle to London, one of the more common airlines traveling that route is KLM. Flights from KLM traveling this route typically cost $1,255.15 RT. This price is typically 52% cheaper than other airlines that offer Seattle to London flights. When booking this route, the cheapest RT price found was $905. Seattle/Tacoma Intl Airport is the most common Seattle airport to take off from when flying to London. London Heathrow Airport is the most popular arrival airport in London. When flying from Seattle to London, KLM flights are 5% more popular than any other airline flying that same route.

Cheap Seattle to London flights in April & May 2024

Find cheap flight options from Seattle to London specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,068,117 searches. Prices were last updated on April 27, 2024.
These are some of the best deals we've found on flights to London in 2024 at this time. For more flight deals, be sure to check back very soon.
Tue 4/305:55 amSEA - LHR
1 stop17h 20mVirgin Atlantic
Wed 5/84:50 pmLHR - SEA
Nonstop10h 30mVirgin Atlantic
Deal found 4/26$632
Tue 4/305:55 amSEA - LHR
1 stop17h 20mVirgin Atlantic
Wed 5/811:00 amLHR - SEA
1 stop14h 24mVirgin Atlantic
Deal found 4/26$637
Wed 5/17:35 pmSEA - LHR
Nonstop9h 40mDelta
Wed 5/159:00 amLHR - SEA
1 stop16h 40mDelta
Deal found 4/26$646
Mon 4/2912:35 amSEA - LHR
1 stop22h 40mDelta
Wed 5/86:15 amLHR - SEA
1 stop19h 25mDelta
Deal found 4/26$651
Wed 5/17:35 pmSEA - LHR
Nonstop9h 40mDelta
Wed 5/1512:45 pmLHR - SEA
Nonstop9h 55mDelta
Deal found 4/26$653
Mon 4/2912:35 amSEA - LHR
1 stop22h 40mDelta
Wed 5/812:45 pmLHR - SEA
Nonstop9h 55mDelta
Deal found 4/26$658
Fri 5/34:30 pmSEA - LHR
Nonstop9h 20mDelta
Tue 5/146:15 amLHR - SEA
1 stop19h 25mDelta
Deal found 4/26$696
Thu 5/27:35 pmSEA - LHR
Nonstop9h 40mKLM
Fri 5/109:55 amLHR - SEA
1 stop14h 45mKLM
Deal found 4/26$699
Fri 5/33:45 pmSEA - LHR
1 stop15h 05mAir France
Tue 5/146:15 amLHR - SEA
1 stop13h 05mAir France
Deal found 4/26$701

Seattle to London 2024 flight deals

Discover exclusive flight deals for travel between Seattle and London in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,068,117 searches. Data last updated April 27, 2024.
These are some of the best deals we've found on flights to London in 2024 at this time. For more flight deals, be sure to check back very soon.
Tue 11/52:35 pmSEA - LGW
1 stop12h 20mMultiple Airlines
Tue 11/1212:00 pmLGW - SEA
1 stop15h 01mMultiple Airlines
Deal found 4/25$566
Wed 10/93:50 pmSEA - LGW
1 stop11h 55mMultiple Airlines
Tue 11/1212:00 pmLGW - SEA
1 stop15h 01mMultiple Airlines
Deal found 4/26$567
Tue 11/52:35 pmSEA - LGW
1 stop12h 20mMultiple Airlines
Thu 11/1412:00 pmLGW - SEA
1 stop15h 01mMultiple Airlines
Deal found 4/26$574
Sun 9/226:55 pmSEA - LHR
1 stop33h 00mIcelandair
Mon 10/79:25 pmLHR - SEA
1 stop28h 30mIcelandair
Deal found 4/26$592
Tue 10/223:50 pmSEA - LGW
1 stop11h 55mIcelandair
Tue 10/2912:00 pmLGW - SEA
1 stop13h 00mIcelandair
Deal found 4/25$603
Tue 10/153:50 pmSEA - LGW
1 stop11h 55mIcelandair
Tue 10/2912:00 pmLGW - SEA
1 stop13h 00mIcelandair
Deal found 4/26$604
Tue 11/52:35 pmSEA - LHR
1 stop20h 45mIcelandair
Tue 11/1212:15 pmLHR - SEA
1 stop12h 45mIcelandair
Deal found 4/26$605
Wed 10/93:50 pmSEA - LHR
1 stop20h 30mIcelandair
Tue 11/1212:15 pmLHR - SEA
1 stop12h 45mIcelandair
Deal found 4/26$606
Mon 10/73:50 pmSEA - LHR
1 stop20h 30mIcelandair
Mon 10/149:25 pmLHR - SEA
1 stop28h 30mIcelandair
Deal found 4/26$607

Non-stop flights to London from Seattle

Discover non-stop flight options from Seattle to London. 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 3,068,117 searches. Data last updated April 27, 2024.
Consider booking one of these non-stop flights heading from Seattle to London. If you're looking for other options for flights from Seattle to London, make sure to update the search form at the top of page.
Wed 9/254:30 pmSEA - LHR
Nonstop9h 20mVirgin Atlantic
Wed 10/212:45 pmLHR - SEA
Nonstop9h 55mVirgin Atlantic
Deal found 4/26$652
Tue 10/19:10 pmSEA - LHR
Nonstop9h 40mKLM
Wed 10/304:35 pmLHR - SEA
Nonstop10h 25mKLM
Deal found 4/26$653
Sun 9/221:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Sat 10/59:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 4/25$702
Sat 10/51:50 pmSEA - LHR
Nonstop9h 20mBritish Airways
Fri 10/189:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 4/26$703
Fri 10/41:30 pmSEA - LHR
Nonstop9h 20mBritish Airways
Fri 10/189:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 4/26$712
Tue 8/209:15 pmSEA - LHR
Nonstop9h 35mDelta
Tue 8/2712:45 pmLHR - SEA
Nonstop9h 55mDelta
Deal found 4/26$721
Mon 9/97:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Thu 9/199:45 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 4/26$734
Mon 8/269:15 pmSEA - LHR
Nonstop9h 35mKLM
Fri 9/64:50 pmLHR - SEA
Nonstop10h 30mKLM
Deal found 4/25$735
Tue 9/39:15 pmSEA - LHR
Nonstop9h 35mDelta
Tue 9/1012:45 pmLHR - SEA
Nonstop9h 55mDelta
Deal found 4/26$736

Seattle to London flights leaving soon

Find last-minute flight options from Seattle to London 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 3,068,117 searches. Data last updated April 27, 2024.
Have a look at some of the last-minute flights available departing from Seattle to London. Users should examine the flight details to ensure there are no surprises.
Wed 5/17:35 pmSEA - LHR
Nonstop9h 40mDelta
Wed 5/159:00 amLHR - SEA
1 stop16h 40mDelta
Deal found 4/26$646
Wed 5/18:35 amSEA - LHR
1 stop14h 40mDelta
Wed 5/159:00 amLHR - SEA
1 stop16h 40mDelta
Deal found 4/26$651
Wed 5/17:35 pmSEA - LHR
Nonstop9h 40mDelta
Wed 5/1512:45 pmLHR - SEA
Nonstop9h 55mDelta
Deal found 4/26$653
Fri 5/34:30 pmSEA - LHR
Nonstop9h 20mDelta
Tue 5/146:15 amLHR - SEA
1 stop19h 25mDelta
Deal found 4/26$696
Thu 5/27:35 pmSEA - LHR
Nonstop9h 40mKLM
Fri 5/109:55 amLHR - SEA
1 stop14h 45mKLM
Deal found 4/26$699
Fri 5/33:45 pmSEA - LHR
1 stop15h 05mAir France
Tue 5/146:15 amLHR - SEA
1 stop13h 05mAir France
Deal found 4/26$701
Thu 5/27:35 pmSEA - LHR
Nonstop9h 40mKLM
Fri 5/104:50 pmLHR - SEA
Nonstop10h 30mKLM
Deal found 4/26$703
Sat 5/43:15 pmSEA - LGW
2 stops31h 05mMultiple Airlines
Thu 5/910:45 amLGW - SEA
2 stops30h 00mMultiple Airlines
Deal found 4/25$711
Sat 5/41:30 pmSEA - LHR
2 stops18h 30mMultiple Airlines
Mon 5/66:40 amLHR - SEA
2 stops23h 44mMultiple Airlines
Deal found 4/25$756

One-way flights to London from Seattle

Search for one-way flight options from Seattle to London. 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 3,068,117 searches. Data last updated April 27, 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.
Tue 10/83:50 pmSEA - LGW
1 stop11h 55mIcelandair
Deal found 4/26$242
Tue 10/83:50 pmSEA - LHR
1 stop20h 30mIcelandair
Deal found 4/26$242
Wed 9/253:50 pmSEA - LHR
1 stop20h 30mIcelandair
Deal found 4/26$261
Wed 9/253:50 pmSEA - LGW
1 stop11h 55mIcelandair
Deal found 4/26$279
Tue 10/13:50 pmSEA - LHR
1 stop12h 05mIcelandair
Deal found 4/26$294
Sat 10/123:50 pmSEA - LHR
1 stop12h 05mIcelandair
Deal found 4/26$300
Thu 9/196:55 pmSEA - LGW
1 stop32h 50mIcelandair
Deal found 4/26$308
Thu 9/196:55 pmSEA - LHR
1 stop33h 00mIcelandair
Deal found 4/26$308
Sat 5/181:15 pmSEA - LGW
2 stops36h 45mMultiple Airlines
Deal found 4/26$314

Find flights from Seattle to London within your budget

Customize your flight search to find flights from Seattle to London 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 3,068,117 searches. Data last updated April 27, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$567 - $652

Route

Depart

Return

Price

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 10/9

1 stop11h 55m

London Gatwick

Tue 11/12

1 stop15h 01m

$567

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 9/22

1 stop33h 00m

London Heathrow

Mon 10/7

1 stop28h 30m

$592

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 10/1

1 stop14h 45m

London Gatwick

Wed 10/9

1 stop18h 20m

$632

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 10/15

2 stops20h 05m

London Gatwick

Tue 10/29

2 stops33h 21m

$636

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 10/1

1 stop14h 50m

London Heathrow

Thu 10/24

2 stops17h 46m

$637

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 10/1

2 stops31h 20m

London Heathrow

Tue 10/22

2 stops19h 30m

$640

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sat 10/5

1 stop14h 27m

London Heathrow

Tue 10/15

1 stop17h 34m

$644

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 10/1

Nonstop9h 20m

London Heathrow

Thu 10/24

1 stop16h 50m

$646

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 10/13

2 stops20h 45m

London Gatwick

Mon 10/21

2 stops31h 41m

$652

Flights are sorted by cheapest first

Deals found on 4/26

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to London. Price data was last updated on January 28, 2024.
Booking 58 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to London. 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?

Use this chart to determine the cheapest time to fly round-trip from Seattle to London. Price data was last updated on April 21, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Seattle to London flight should consider departing on Tuesday afternoons 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 London by month

Plan your trip from Seattle to London by taking into account the cheapest months to travel. The average price of a one-way flight from Seattle to London is currently $283 while a round-trip flight costs $627. Price data was last updated on April 21, 2024.

Currently, November is the cheapest month in which you can book a flight from Seattle to London (average of $653). Flying from Seattle to London in June is currently the most expensive (average of $1,173). 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

$675

February

$664

March

$715

April

$700

May

$748

June

$1,173

July

$987

August

$779

September

$748

October

$712

November

$653

December

$672

Temperature and rainfall in London by month

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

LON

Temperature

39.2 - 62.6 °F

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated April 27, 2024.
See what other customers who have flown with Icelandair, KLM and Lufthansa from Seattle to London have to say. 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
10,951 reviews
Check prices

Boarding

8.2

Comfort

7.9

Crew

8.6

Entertainment

8.0

Food

7.4

Overall

8.1

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Delta
8.1
Very good
10,951 reviews
Delta
8.1
Very good
10,951 reviews
Check prices

Boarding

8.2

Comfort

7.9

Crew

8.6

Entertainment

8.0

Food

7.4

Overall

8.1

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

KLM
7.9
Good
1,623 reviews
Delta
8.1
Very good
10,951 reviews
Check prices

Boarding

8.2

Comfort

7.9

Crew

8.6

Entertainment

8.0

Food

7.4

Overall

8.1

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

SWISS
7.8
Good
2,056 reviews
Delta
8.1
Very good
10,951 reviews
Check prices

Boarding

8.2

Comfort

7.9

Crew

8.6

Entertainment

8.0

Food

7.4

Overall

8.1

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Finnair
7.8
Good
1,382 reviews
Delta
8.1
Very good
10,951 reviews
Check prices

Boarding

8.2

Comfort

7.9

Crew

8.6

Entertainment

8.0

Food

7.4

Overall

8.1

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Virgin Atlantic
7.7
Good
746 reviews
Delta
8.1
Very good
10,951 reviews
Check prices

Boarding

8.2

Comfort

7.9

Crew

8.6

Entertainment

8.0

Food

7.4

Overall

8.1

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Related info for your journey

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

    If you book a flight to London from Seattle, you will be flying from Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle. There are 19 flights from Seattle/Tacoma Intl to London per day from 16 different airlines.

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

    Yes, there are multiple flights from Seattle to London for under $600. The cheapest flight booked recently is on Multiple Airlines for just $567, but on average you can expect to pay $611.

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

    Cheapflights has at least 20 direct flights from Seattle to London under $700. A good price for a nonstop flight from Seattle to London is less than $742.

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

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

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

    Cheapflights users have booked flights from Seattle to London round-trip from $592. Other airlines that can offer you cheap pricing are Virgin Atlantic, from $632, and American Airlines, from $636. Users have found that Icelandair is 31% cheaper than the other options available to this destination.

  • What are the most popular routes from Seattle to London?

    When deciding which route to take from Seattle to London consider Seattle/Tacoma Intl - London Heathrow, Seattle/Tacoma Intl - London Gatwick or Seattle/Tacoma Intl - London City as they are the most popular.

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

    Before booking your flight from Seattle to London 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?

    Consider Air France (78%), Delta (78%) or KLM (78%) when booking your flight. These represent the most reliable airlines when flying from Seattle to London.

  • What are the cheapest flights from Seattle to London?

    Looking at all options, your cheapest flight can be booked for $474. While the most popular route (Seattle/Tacoma Intl - London Heathrow) can be booked for $601 on average our data indicates $1,497 when flying from Seattle to London.

  • 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. London Gatwick Airport (LGW), London Stansted Airport (STN), London Luton Airport (LTN), London City Airport (LCY), London Southend Airport (SEN) are other airports near this flight route and their unique identifiers/IATA codes.

  • Where are the most common layover locations when flying from Seattle to London?

    The most popular layover on flights from Seattle to London is Reykjavik.

  • What are some popular things to do or see while on a layover in Reykjavik?

    Reykjavik travelers tend to visit Hallgrímskirkja, Icelandic Phallological Museum, and Harpa more than anywhere else. Hallgrímskirkja, Icelandic Phallological Museum, and Harpa are located about 23.2 mi, 23.5 mi, and 23.3 mi, respectively from Reykjavik Keflavik Intl. Travelers in need of a car in Reykjavik can rent one for about $54 per day.

  • Where are the least popular layover locations for Seattle to London flights?

    Flights departing from Seattle and landing in London layover in Dublin least frequently.

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

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

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

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

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

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

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

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

    Many airlines flying from Seattle to London 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 London?

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

    The Seattle to London flight deals you see on this page were last updated on 4/26.

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Fly from Seattle to London on these airlines
Choose from the following airlines for your flight from Seattle to London. Flights are based on user searches made on Cheapflights and were last updated on April 27, 2024.

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

Top 10 airlines flying from Seattle to London

Discover the top 10 airlines that operate flights from Seattle to London. 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 3,068,117 searches. Data last updated April 27, 2024.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$402Average$697FlexibilityNo cancel feeOn-time76%
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IcelandairCheapest$514Average$715FlexibilityNo cancel feeOn-time76%
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Aer LingusCheapest$526Average$831FlexibilityNo cancel feeOn-timeN/A
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FinnairCheapest$572Average$943FlexibilityNo cancel feeOn-time76%
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United AirlinesCheapest$575Average$890FlexibilityNo cancel feeOn-time69%
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IberiaCheapest$583Average$867FlexibilityNo cancel feeOn-time77%
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Air FranceCheapest$586Average$878FlexibilityNo cancel feeOn-time77%
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Air CanadaCheapest$604Average$902FlexibilityNo cancel feeOn-time67%
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American AirlinesCheapest$606Average$916FlexibilityNo cancel feeOn-time71%
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British AirwaysCheapest$632Average$921FlexibilityNo cancel feeOn-time70%
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Search flights from Seattle to London by cabin class

Find flights from Seattle to London, 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 London

Find hourly flight availability from Seattle to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 27, 2024.
0%of flight departuresEarly morningMidnight to 6 am
0%of flight departuresMorning6 am to noon
40%of flight departuresAfternoonNoon to 6 pm
60%of flight departuresEvening6 pm to midnight
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Weekly flight availability from Seattle to London

Explore weekly flight availability from Seattle to London. 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 April 27, 2024.
Sunday20daily flights
Monday20daily flights
Tuesday15daily flights
Wednesday20daily flights
Thursday20daily flights
Friday20daily flights
Saturday20daily flights

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When you search for this flight from Seattle to London, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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