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Cheap flights from Seattle to London from C$ 438

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 19/9. 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
24 Apr — 1 May1
1 adult
Wed 24/4
Wed 1/5

The best prices from Seattle/Tacoma Intl to London are usually found in January or February, booked 58 days in advance, depart on a Wednesday or Thursday 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 19 April 2024.

Popular in

June

Cheapest in

January

Round-trip from

C$ 762

One-way from

C$ 725
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?

Tuesday is generally a great day to depart. Flying on this day could help you save up to 35%.

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

To save up to 39% on this flight, we recommend booking at least 59 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 from C$ 1,192 1-2 weeks out and tickets from C$ 1,574 for flights departing within the next 72 hours.

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 C$ 1,184 per person but you can even find prices for as low as C$ 636. 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)?

It’s optimal to fly from Seattle to London at noon. By choosing this option you can save up to 10% on the cost of your flight, compared to a flight in the morning.

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 505,255 searches. Data last updated 19 April 2024.
Find some of the cheapest KLM flights travelling from Seattle to London. Make sure to double check the flight details before booking.
Wed 24/47:20 a.m.SEA - LGW
1 stop18h 40mKLM
Wed 1/512:00 p.m.LGW - SEA
1 stop18h 24mKLM
Deal found 17/4C$ 870
Tue 23/47:30 p.m.SEA - LHR
Nonstop9h 45mKLM
Thu 2/53:55 p.m.LHR - SEA
Nonstop10h 30mKLM
Deal found 19/4C$ 899
Fri 3/57:35 p.m.SEA - LHR
Nonstop9h 40mKLM
Tue 14/54:50 p.m.LHR - SEA
Nonstop10h 30mKLM
Deal found 18/4C$ 927
Thu 2/57:35 p.m.SEA - LHR
Nonstop9h 40mKLM
Wed 8/54:50 p.m.LHR - SEA
Nonstop10h 30mKLM
Deal found 18/4C$ 948
Wed 1/51:35 p.m.SEA - LHR
1 stop12h 25mKLM
Sun 5/53:55 p.m.LHR - SEA
Nonstop10h 30mKLM
Deal found 18/4C$ 955
Wed 25/99:15 p.m.SEA - LHR
Nonstop9h 35mKLM
Sat 5/104:50 p.m.LHR - SEA
Nonstop10h 25mKLM
Deal found 17/4C$ 967
Thu 2/57:35 p.m.SEA - LHR
Nonstop9h 40mKLM
Sun 12/54:50 p.m.LHR - SEA
Nonstop10h 30mKLM
Deal found 19/4C$ 996
Thu 2/57:35 p.m.SEA - LHR
Nonstop9h 40mKLM
Mon 6/511:45 a.m.LHR - SEA
1 stop12h 55mKLM
Deal found 18/4C$ 1,010
Thu 2/57:35 p.m.SEA - LHR
Nonstop9h 40mKLM
Mon 6/53:55 p.m.LHR - SEA
Nonstop10h 30mKLM
Deal found 18/4C$ 1,018

  • KLM is one of the most popular airlines used for those travelling from Seattle to London. Seattle to London flights are typically 111% more expensive than other airlines travelling the same route. Flights from KLM typically cost C$ 784.79 RT. The cheapest KLM flight found for this route was C$ 658. 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, KLM flights are 8% more popular than any other airline flying that same route.

Cheap Delta flights from Seattle to London

Explore cheap flight options specifically provided by Delta 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 505,255 searches. Data last updated 19 April 2024.
To aid your search, here are some of the cheapest Delta flights we've found from Seattle to London. Deals are refreshing constantly so come back soon for more options.
Sun 21/47:30 p.m.SEA - LHR
Nonstop9h 45mDelta
Tue 7/511:30 a.m.LHR - SEA
1 stop14h 10mDelta
Deal found 17/4C$ 889
Mon 29/41:40 p.m.SEA - LHR
1 stop13h 40mDelta
Tue 7/56:15 a.m.LHR - SEA
1 stop13h 05mDelta
Deal found 18/4C$ 890
Tue 30/44:30 p.m.SEA - LHR
Nonstop9h 20mDelta
Wed 8/58:40 a.m.LHR - SEA
1 stop16h 00mDelta
Deal found 18/4C$ 893
Tue 23/47:20 a.m.SEA - LHR
1 stop15h 05mDelta
Thu 2/56:15 a.m.LHR - SEA
1 stop13h 05mDelta
Deal found 18/4C$ 896
Tue 30/47:30 p.m.SEA - LHR
Nonstop9h 45mDelta
Tue 7/512:45 p.m.LHR - SEA
Nonstop9h 55mDelta
Deal found 18/4C$ 899
Tue 8/1012:35 a.m.SEA - LHR
1 stop22h 40mDelta
Wed 30/1011:35 a.m.LHR - SEA
Nonstop9h 55mDelta
Deal found 17/4C$ 905
Sun 22/912:30 a.m.SEA - LHR
1 stop22h 45mDelta
Mon 7/105:35 p.m.LHR - SEA
1 stop25h 45mDelta
Deal found 18/4C$ 911
Sat 28/910:55 p.m.SEA - LHR
1 stop13h 15mDelta
Thu 10/1010:50 a.m.LHR - SEA
1 stop16h 33mDelta
Deal found 18/4C$ 919
Thu 2/55:30 p.m.SEA - LHR
1 stop15h 00mDelta
Tue 7/56:15 a.m.LHR - SEA
1 stop13h 05mDelta
Deal found 18/4C$ 940

  • One of the most popular airlines travelling from Seattle to London is Delta. Flights on this route from Delta typically cost C$ 697.47 RT, a price that is 127% cheaper than the average Seattle to London flight. The cheapest flight found was C$ 603 RT. 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, Delta flights are 4% 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 505,255 searches. Prices were last updated on 19 April 2024.
The lowest fares we've come across on flights travelling from Seattle to London in April and May 2024. More deals are always being added, so be sure to check back regularly.
Wed 1/59:35 a.m.SEA - LHR
1 stop18h 15mMultiple Airlines
Tue 7/510:50 a.m.LHR - SEA
2 stops19h 27mMultiple Airlines
Deal found 18/4C$ 867
Sun 21/47:20 a.m.SEA - LGW
1 stop18h 40mVirgin Atlantic
Tue 7/512:00 p.m.LGW - SEA
1 stop18h 18mVirgin Atlantic
Deal found 19/4C$ 870
Sun 21/47:20 a.m.SEA - LGW
1 stop18h 40mVirgin Atlantic
Tue 7/512:00 p.m.LGW - SEA
2 stops18h 25mVirgin Atlantic
Deal found 19/4C$ 877
Wed 1/59:35 a.m.SEA - LHR
1 stop18h 15mMultiple Airlines
Wed 8/56:30 a.m.LHR - SEA
2 stops15h 57mMultiple Airlines
Deal found 18/4C$ 877
Fri 19/41:10 p.m.SEA - LHR
1 stop16h 10mLufthansa
Sun 21/47:25 a.m.LHR - SEA
2 stops22h 27mLufthansa
Deal found 18/4C$ 878
Fri 3/57:40 a.m.SEA - LHR
1 stop14h 50mMultiple Airlines
Sun 5/56:30 a.m.LHR - SEA
2 stops15h 57mMultiple Airlines
Deal found 18/4C$ 879
Wed 1/59:35 a.m.SEA - LHR
1 stop18h 15mAir Canada
Wed 8/52:05 p.m.LHR - SEA
1 stop15h 26mAir Canada
Deal found 18/4C$ 885
Mon 29/49:35 a.m.SEA - LHR
1 stop13h 00mMultiple Airlines
Tue 7/510:50 a.m.LHR - SEA
2 stops19h 27mMultiple Airlines
Deal found 18/4C$ 886
Sun 21/47:30 p.m.SEA - LHR
Nonstop9h 45mDelta
Tue 7/511:30 a.m.LHR - SEA
1 stop14h 10mDelta
Deal found 17/4C$ 889

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 505,255 searches. Data last updated 19 April 2024.
The lowest fares we've come across on flights travelling from Seattle to London in April and May 2024. More deals are always being added, so be sure to check back regularly.
Sun 13/103:50 p.m.SEA - LGW
1 stop11h 55mIcelandair
Tue 22/101:00 p.m.LGW - SEA
1 stop12h 55mIcelandair
Deal found 19/4C$ 863
Wed 2/103:50 p.m.SEA - LHR
1 stop12h 05mIcelandair
Thu 10/101:10 p.m.LHR - SEA
1 stop12h 45mIcelandair
Deal found 18/4C$ 866
Wed 1/59:35 a.m.SEA - LHR
1 stop18h 15mMultiple Airlines
Tue 7/510:50 a.m.LHR - SEA
2 stops19h 27mMultiple Airlines
Deal found 18/4C$ 867
Sun 21/47:20 a.m.SEA - LGW
1 stop18h 40mVirgin Atlantic
Tue 7/512:00 p.m.LGW - SEA
1 stop18h 18mVirgin Atlantic
Deal found 17/4C$ 870
Sun 29/93:50 p.m.SEA - LHR
1 stop12h 05mIcelandair
Wed 9/101:05 p.m.LHR - SEA
1 stop12h 50mIcelandair
Deal found 18/4C$ 874
Sun 21/47:20 a.m.SEA - LGW
1 stop18h 40mVirgin Atlantic
Tue 7/512:00 p.m.LGW - SEA
2 stops18h 25mVirgin Atlantic
Deal found 19/4C$ 877
Wed 1/59:35 a.m.SEA - LHR
1 stop18h 15mMultiple Airlines
Wed 8/56:30 a.m.LHR - SEA
2 stops15h 57mMultiple Airlines
Deal found 18/4C$ 877
Fri 19/41:10 p.m.SEA - LHR
1 stop16h 10mLufthansa
Sun 21/47:25 a.m.LHR - SEA
2 stops22h 27mLufthansa
Deal found 18/4C$ 878
Fri 3/57:40 a.m.SEA - LHR
1 stop14h 50mMultiple Airlines
Sun 5/56:30 a.m.LHR - SEA
2 stops15h 57mMultiple Airlines
Deal found 18/4C$ 879

Direct 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 505,255 searches. Data last updated 19 April 2024.
For a shorter flight, select one of these non-stop flights from Seattle to London. Select from other flights from Seattle to London by using the search form above.
Tue 24/99:15 p.m.SEA - LHR
Nonstop9h 35mKLM
Wed 9/104:50 p.m.LHR - SEA
Nonstop10h 25mKLM
Deal found 18/4C$ 899
Fri 3/57:35 p.m.SEA - LHR
Nonstop9h 40mKLM
Tue 14/54:50 p.m.LHR - SEA
Nonstop10h 30mKLM
Deal found 18/4C$ 927
Thu 2/57:35 p.m.SEA - LHR
Nonstop9h 40mKLM
Wed 8/54:50 p.m.LHR - SEA
Nonstop10h 30mKLM
Deal found 18/4C$ 948
Thu 2/57:35 p.m.SEA - LHR
Nonstop9h 40mDelta
Wed 8/512:45 p.m.LHR - SEA
Nonstop9h 55mDelta
Deal found 18/4C$ 949
Wed 25/99:15 p.m.SEA - LHR
Nonstop9h 35mKLM
Sun 6/104:50 p.m.LHR - SEA
Nonstop10h 25mKLM
Deal found 17/4C$ 967
Sat 28/97:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Fri 11/109:50 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 18/4C$ 980
Sun 18/89:15 p.m.SEA - LHR
Nonstop9h 35mDelta
Thu 29/84:50 p.m.LHR - SEA
Nonstop10h 25mDelta
Deal found 18/4C$ 992
Thu 2/57:35 p.m.SEA - LHR
Nonstop9h 40mKLM
Sun 12/54:50 p.m.LHR - SEA
Nonstop10h 30mKLM
Deal found 19/4C$ 996
Wed 11/97:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Fri 27/99:50 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 19/4C$ 1,013

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 505,255 searches. Data last updated 19 April 2024.
Users seeking a last-minute flight from Seattle to London should consider booking one of these fares. To prevent any unwanted surprises, users should verify their flight info before booking.
Wed 1/59:35 a.m.SEA - LHR
1 stop18h 15mMultiple Airlines
Tue 7/510:50 a.m.LHR - SEA
2 stops19h 27mMultiple Airlines
Deal found 18/4C$ 867
Wed 24/47:20 a.m.SEA - LGW
1 stop18h 40mKLM
Wed 1/512:00 p.m.LGW - SEA
1 stop18h 24mKLM
Deal found 17/4C$ 870
Wed 24/45:55 a.m.SEA - LGW
2 stops20h 05mVirgin Atlantic
Wed 1/512:00 p.m.LGW - SEA
1 stop18h 24mVirgin Atlantic
Deal found 17/4C$ 877
Wed 1/59:35 a.m.SEA - LHR
1 stop18h 15mMultiple Airlines
Wed 8/56:30 a.m.LHR - SEA
2 stops15h 57mMultiple Airlines
Deal found 18/4C$ 877
Fri 3/57:40 a.m.SEA - LHR
1 stop14h 50mMultiple Airlines
Sun 5/56:30 a.m.LHR - SEA
2 stops15h 57mMultiple Airlines
Deal found 18/4C$ 879
Wed 1/59:35 a.m.SEA - LHR
1 stop18h 15mAir Canada
Wed 8/52:05 p.m.LHR - SEA
1 stop15h 26mAir Canada
Deal found 18/4C$ 885
Mon 29/49:35 a.m.SEA - LHR
1 stop13h 00mMultiple Airlines
Tue 7/510:50 a.m.LHR - SEA
2 stops19h 27mMultiple Airlines
Deal found 18/4C$ 886
Sun 21/47:30 p.m.SEA - LHR
Nonstop9h 45mDelta
Tue 7/511:30 a.m.LHR - SEA
1 stop14h 10mDelta
Deal found 17/4C$ 889
Mon 29/44:30 p.m.SEA - LHR
Nonstop9h 20mDelta
Tue 7/56:15 a.m.LHR - SEA
1 stop13h 05mDelta
Deal found 18/4C$ 890

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 505,255 searches. Data last updated 19 April 2024.
Users in need of a one-way flight from Seattle to London can choose from these deals. Those seeking round-trip flights from Seattle to London should utilize the search form at the top of the page.
Thu 19/96:55 p.m.SEA - LHR
1 stop17h 25mIcelandair
Deal found 18/4C$ 438
Sun 15/93:50 p.m.SEA - LGW
1 stop11h 55mIcelandair
Deal found 18/4C$ 488
Mon 12/86:55 p.m.SEA - LHR
1 stop17h 25mIcelandair
Deal found 18/4C$ 488
Tue 13/811:00 p.m.SEA - LHR
1 stop13h 20mIcelandair
Deal found 18/4C$ 548
Sat 17/811:00 p.m.SEA - LHR
1 stop13h 20mIcelandair
Deal found 18/4C$ 557
Tue 24/93:50 p.m.SEA - LGW
1 stop11h 55mIcelandair
Deal found 18/4C$ 574
Mon 23/91:00 p.m.SEA - LHR
2 stops15h 05mWestJet
Deal found 18/4C$ 586
Sun 25/87:25 p.m.SEA - LGW
2 stops29h 35mWestJet
Deal found 19/4C$ 605
Mon 29/43:50 p.m.SEA - LGW
1 stop11h 55mIcelandair
Deal found 18/4C$ 643

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 505,255 searches. Data last updated 19 April 2024.

Fly from

Any airport

Fly to

Any airport

Budget

C$ 863 - C$ 927

Route

Depart

Return

Price

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 13/10

1 stop11h 55m

London Gatwick

Wed 23/10

1 stop12h 55m

C$ 863

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 1/5

1 stop18h 15m

London Heathrow

Tue 7/5

2 stops19h 27m

C$ 867

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 9/10

1 stop14h 45m

London Gatwick

Wed 16/10

1 stop18h 20m

C$ 870

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 24/9

2 stops33h 20m

London Heathrow

Tue 12/11

1 stop17h 25m

C$ 881

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 1/5

1 stop18h 15m

London Heathrow

Wed 8/5

1 stop15h 26m

C$ 885

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 1/5

Nonstop9h 40m

London Heathrow

Wed 15/5

1 stop16h 40m

C$ 889

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 30/4

1 stop34h 38m

London Heathrow

Fri 17/5

1 stop30h 38m

C$ 897

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 30/9

2 stops19h 10m

London Heathrow

Mon 7/10

2 stops33h 16m

C$ 901

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Fri 3/5

Nonstop9h 40m

London Heathrow

Tue 14/5

Nonstop10h 30m

C$ 927

Flights are sorted by cheapest first

Deals found on 19/4

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 28 January 2024.
The price you pay for your flight from Seattle to London may vary depending on when you book. For the best chance of a lower fare, look to book 58 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
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 14 April 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Seattle to London flight should consider departing on Wednesday evenings when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

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 C$ 548 while a round-trip flight costs C$ 887. Price data was last updated on 14 April 2024.

Currently, January is the cheapest month in which you can book a flight from Seattle to London (average of C$ 560). Flying from Seattle to London in July is currently the most expensive (average of C$ 947). 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

C$ 771

February

C$ 842

March

C$ 936

April

C$ 921

May

C$ 1,005

June

C$ 1,113

July

C$ 1,303

August

C$ 1,120

September

C$ 995

October

C$ 923

November

C$ 907

December

C$ 994

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

4 - 17 °C

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 19 April 2024.
To help decide which airline to fly from Seattle to London, see what other customers have to say about KLM, Delta and Lufthansa. 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
11,094 reviews
Check prices

Boarding

8.2

Crew

8.6

Overall

8.1

Comfort

7.9

Food

7.5

Entertainment

8.0

Reviews

1 / 10

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

Delta
8.1
Very good
11,094 reviews
Delta
8.1
Very good
11,094 reviews
Check prices

Boarding

8.2

Crew

8.6

Overall

8.1

Comfort

7.9

Food

7.5

Entertainment

8.0

Reviews

1 / 10

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

KLM
7.9
Good
1,641 reviews
Delta
8.1
Very good
11,094 reviews
Check prices

Boarding

8.2

Crew

8.6

Overall

8.1

Comfort

7.9

Food

7.5

Entertainment

8.0

Reviews

1 / 10

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

SWISS
7.8
Good
2,090 reviews
Delta
8.1
Very good
11,094 reviews
Check prices

Boarding

8.2

Crew

8.6

Overall

8.1

Comfort

7.9

Food

7.5

Entertainment

8.0

Reviews

1 / 10

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

Finnair
7.8
Good
1,390 reviews
Delta
8.1
Very good
11,094 reviews
Check prices

Boarding

8.2

Crew

8.6

Overall

8.1

Comfort

7.9

Food

7.5

Entertainment

8.0

Reviews

1 / 10

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

Virgin Atlantic
7.7
Good
751 reviews
Delta
8.1
Very good
11,094 reviews
Check prices

Boarding

8.2

Crew

8.6

Overall

8.1

Comfort

7.9

Food

7.5

Entertainment

8.0

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?

    Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to London. On average, Seattle/Tacoma Intl has 19 outbound flights to London per day from 6 airlines. Seattle/Tacoma Intl is conveniently located just 18.4 km from Seattle’s city centre.

  • Can I find flights from Seattle to London for under C$ 900 on Cheapflights?

    Yes, there are multiple flights from Seattle to London for under C$ 900. The cheapest flight booked recently is on Icelandair for just C$ 863, but on average you can expect to pay C$ 883.

  • Are there direct flights from Seattle to London for under C$ 900 on Cheapflights?

    Cheapflights has 20 direct flights from Seattle to London under C$ 900. A good price for a direct flight from Seattle to London is less than C$ 1,016.

  • Are there last-minute flights available from Seattle to London for under C$ 900?

    There are currently 20+ open flights from Seattle to London within the next 7 days for less than C$ 900.

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

    According to our current data, Icelandair (C$ 863), Virgin Atlantic (C$ 870), and Lufthansa (C$ 881) offers the cheapest pricing from Seattle to London. These flights start at 27% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Seattle to London one-way?

    C$ 438 is the cheapest one-way deal found within the past few days, from Icelandair. You may also be able to find cheap deals on WestJet and Lufthansa, with prices starting from C$ 586 and C$ 651, respectively.

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

    Consider Finnair, British Airways or Delta when booking your flight. These represent the most popular airlines when flying from Seattle to London.

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

    The top 3 most reliable airlines when flying from Seattle to London are Air France (78%), Delta (78%) and KLM (78%).

  • What are the cheapest flights from Seattle to London?

    Looking at all options, your cheapest flight can be booked for C$ 651. While the most popular route (Seattle/Tacoma Intl - London Heathrow) can be booked for C$ 896 on average our data indicates C$ 1,023 when flying from Seattle to London.

  • What does SEA to LHR mean?

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

  • 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 19/4.

See more FAQs

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

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Top 6 airlines flying from Seattle to London

Discover the top 6 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 505,255 searches. Data last updated 19 April 2024.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapestC$ 671AverageC$ 1,199FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
IberiaCheapestC$ 749AverageC$ 1,076FlexibilityNo cancel feeOn-time77%
Search Iberia flights
FinnairCheapestC$ 830AverageC$ 960FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Virgin AtlanticCheapestC$ 867AverageC$ 1,224FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
DeltaCheapestC$ 906AverageC$ 1,080FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
British AirwaysCheapestC$ 961AverageC$ 1,298FlexibilityNo cancel feeOn-time70%
Search British Airways flights
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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 19 April 2024.
1%of flight departuresEarly morningMidnight to 6 am
0%of flight departuresMorning6 am to noon
51%of flight departuresAfternoonNoon to 6 pm
48%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 19 April 2024.
Sunday20daily flights
Monday20daily flights
Tuesday15daily flights
Wednesday20daily flights
Thursday20daily flights
Friday20daily flights
Saturday20daily flights

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Fly with Cheapflights

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

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

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

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Seattle to London for you. Better yet — we are completely free to use.

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

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

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

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

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