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Cheap flights from Seattle to London from £198

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 13/5. 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
7 May — 14 May1
1 adult
Tue 7/5
Tue 14/5

The best prices from Seattle/Tacoma Intl to London are usually found in January or February, booked 58 days in advance, depart on a Thursday or Sunday and return on a Wednesday

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 2 May 2024.

Popular in

June

Cheapest in

January

Average price

£635

Round-trip from

£69
High demand for flights, 24% potential price rise
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Best time to find cheap flights, 22% potential price drop
Search Deals
Average for round-trip flights in May 2024
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From Seattle/Tacoma Intl to London (LON)
Search Deals

What is the cheapest day to fly round-trip from Seattle to London?

Flying to your destination on a Monday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to London. Check prices with Cheapflights to find a great deal for your trip.

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

Travelers have found it’s best to book a flight 59 days in advance to save up to 39% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 59 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Seattle to London 1-2 weeks in advance for as low as £693, or £916 for flights within the next 24 hours.

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

The best pricing can be found in the month of January. Prices to London from Seattle average £689. You can even find prices in January for less than £689, as users have found deals to London from as low as £370. The month of June appears to be one of the more expensive times to travel to London from Seattle. Flying in the targeted month can save you up to 32%.

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 at midday could potentially save you up to 28% on airfare.

Cheap Air Canada flights from Seattle to London

Explore cheap flight options specifically provided by Air Canada 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 903,063 searches. Data last updated 2 May 2024.
Find some of the cheapest Air Canada flights travelling from Seattle to London. Come back soon if you're not finding the exact deal you're looking for.
Mon 23/907:40SEA - LHR
1 stop18h 20mAir Canada
Tue 8/1008:40LHR - SEA
2 stops17h 46mAir Canada
Deal found 30/4£511
Mon 28/1009:55SEA - LHR
2 stops17h 15mAir Canada
Mon 4/1113:00LHR - SEA
2 stops16h 56mAir Canada
Deal found 1/5£547
Fri 10/505:50SEA - LHR
2 stops18h 45mAir Canada
Fri 31/509:30LHR - SEA
1 stop19h 46mAir Canada
Deal found 1/5£902

  • Air Canada is one of the most popular airlines used for those travelling from Seattle to London. Flights from Air Canada travelling this route typically cost £916.39 RT. This price is typically 56% more expensive than other airlines that offer Seattle to London flights. When booking this route, the cheapest RT price found was £638. 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, Air Canada flights are 5% more popular than any other airline flying that same route.

Cheap Lufthansa flights from Seattle to London

Explore cheap flight options specifically provided by Lufthansa 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 903,063 searches. Data last updated 2 May 2024.
Have a look at some of the cheapest available Lufthansa flights departing from Seattle and landing in London. Check back soon if you're not seeing flights that suit your needs.
Wed 2/1010:40SEA - LHR
2 stops17h 10mLufthansa
Wed 9/1007:25LHR - SEA
2 stops37h 05mLufthansa
Deal found 1/5£513
Wed 16/1013:10SEA - LHR
1 stop16h 10mLufthansa
Tue 22/1020:25LHR - SEA
2 stops33h 55mLufthansa
Deal found 2/5£519
Wed 9/1015:10SEA - LHR
1 stop14h 10mLufthansa
Tue 12/1107:40LHR - SEA
2 stops24h 28mLufthansa
Deal found 1/5£521
Wed 8/510:40SEA - LHR
2 stops17h 10mLufthansa
Fri 17/506:30LHR - SEA
1 stop13h 55mLufthansa
Deal found 1/5£759
Wed 8/513:10SEA - LCY
2 stops19h 15mLufthansa
Thu 16/509:15LCY - SEA
1 stop35h 10mLufthansa
Deal found 1/5£828
Wed 8/514:15SEA - LCY
1 stop20h 20mLufthansa
Thu 16/509:15LCY - SEA
1 stop35h 10mLufthansa
Deal found 2/5£848

  • One of the most popular airlines travelling from Seattle to London is Lufthansa. Flights from Lufthansa travelling this route typically cost £886.96 RT. This price is typically 58% cheaper than other airlines that offer Seattle to London flights. When booking this route, the cheapest RT price found was £674. 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, Lufthansa flights are 5% more popular than any other airline flying that same route.

Cheap Seattle to London flights in May & June 2024

Find cheap flight options from Seattle to London specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 903,063 searches. Prices were last updated on 2 May 2024.
Listed are some of the best fares we've found on flights departing from Seattle to London in 2024. Check back regularly for other flight deals.
Mon 13/518:55SEA - LHR
1 stop17h 25mIcelandair
Sun 19/521:25LHR - SEA
1 stop28h 15mIcelandair
Deal found 1/5£603
Mon 27/507:00SEA - LGW
2 stops31h 50mMultiple Airlines
Mon 10/609:20LGW - SEA
2 stops19h 15mMultiple Airlines
Deal found 30/4£604
Mon 27/507:00SEA - LTN
2 stops25h 55mMultiple Airlines
Mon 10/606:00LTN - SEA
2 stops14h 56mMultiple Airlines
Deal found 30/4£604
Mon 13/518:40SEA - LGW
1 stop31h 10mTurkish Airlines
Mon 20/517:15LGW - SEA
1 stop31h 30mTurkish Airlines
Deal found 1/5£614
Thu 23/521:19SEA - LGW
2 stops29h 36mMultiple Airlines
Thu 30/510:45LGW - SEA
2 stops30h 00mMultiple Airlines
Deal found 1/5£621
Wed 22/509:35SEA - LGW
3 stops28h 45mMultiple Airlines
Sun 26/510:45LGW - SEA
2 stops30h 00mMultiple Airlines
Deal found 2/5£622
Mon 27/507:00SEA - LGW
2 stops31h 50mMultiple Airlines
Mon 10/620:45LGW - SEA
3 stops31h 50mMultiple Airlines
Deal found 30/4£635
Sun 12/518:55SEA - LGW
1 stop32h 50mIcelandair
Sat 18/513:00LGW - SEA
1 stop12h 40mIcelandair
Deal found 1/5£636
Sun 12/518:55SEA - LHR
1 stop17h 25mIcelandair
Sat 18/513:05LHR - SEA
1 stop12h 35mIcelandair
Deal found 1/5£636

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 903,063 searches. Data last updated 2 May 2024.
Listed are some of the best fares we've found on flights departing from Seattle to London in 2024. Check back regularly for other flight deals.
Wed 9/1015:50SEA - LGW
1 stop11h 55mMultiple Airlines
Tue 12/1112:00LGW - SEA
1 stop15h 01mMultiple Airlines
Deal found 1/5£456
Tue 5/1114:35SEA - LGW
1 stop12h 20mMultiple Airlines
Tue 12/1112:00LGW - SEA
1 stop15h 01mMultiple Airlines
Deal found 1/5£457
Sun 3/1114:35SEA - LGW
1 stop12h 20mMultiple Airlines
Tue 19/1112:00LGW - SEA
1 stop15h 01mMultiple Airlines
Deal found 1/5£460
Sun 6/1018:55SEA - LGW
1 stop32h 50mIcelandair
Thu 31/1012:00LGW - SEA
1 stop13h 00mIcelandair
Deal found 1/5£461
Wed 30/1015:50SEA - LGW
1 stop12h 05mMultiple Airlines
Tue 12/1112:00LGW - SEA
1 stop15h 01mMultiple Airlines
Deal found 2/5£463
Sun 6/1015:50SEA - LHR
1 stop12h 05mIcelandair
Thu 31/1020:25LHR - SEA
1 stop28h 35mIcelandair
Deal found 1/5£463
Sat 5/1017:00SEA - LGW
1 stop33h 55mMultiple Airlines
Tue 29/1012:00LGW - SEA
1 stop27h 45mMultiple Airlines
Deal found 1/5£463
Mon 23/915:50SEA - LHR
1 stop12h 05mIcelandair
Tue 22/1021:25LHR - SEA
1 stop28h 30mIcelandair
Deal found 1/5£471
Wed 9/1015:50SEA - LHR
1 stop20h 30mIcelandair
Wed 30/1020:25LHR - SEA
1 stop28h 35mIcelandair
Deal found 1/5£473

Direct flights to London from Seattle

Discover direct flight options from Seattle to London. Find direct flights with no stopovers, providing a convenient travel experience. Explore direct flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 903,063 searches. Data last updated 2 May 2024.
Consider booking one of these non-stop flights heading from Seattle to London. Those looking to potentially save on 1 or 2-stop flights from Seattle to London should utilise the search form at the top of the page.
Sun 6/1019:40SEA - LHR
Nonstop9h 20mBritish Airways
Thu 31/1014:50LHR - SEA
Nonstop9h 55mBritish Airways
Deal found 1/5£522
Sun 22/913:40SEA - LHR
Nonstop9h 20mBritish Airways
Thu 31/1014:50LHR - SEA
Nonstop9h 55mBritish Airways
Deal found 2/5£523
Tue 24/921:15SEA - LHR
Nonstop9h 35mKLM
Wed 2/1016:50LHR - SEA
Nonstop10h 25mKLM
Deal found 1/5£523
Mon 28/1019:05SEA - LHR
Nonstop9h 35mVirgin Atlantic
Mon 4/1116:35LHR - SEA
Nonstop10h 25mVirgin Atlantic
Deal found 1/5£545
Thu 19/916:30SEA - LHR
Nonstop9h 20mVirgin Atlantic
Thu 31/1011:35LHR - SEA
Nonstop9h 55mVirgin Atlantic
Deal found 2/5£547
Tue 1/1021:10SEA - LHR
Nonstop9h 40mKLM
Sun 13/1016:50LHR - SEA
Nonstop10h 25mKLM
Deal found 1/5£561
Fri 20/921:15SEA - LHR
Nonstop9h 35mKLM
Thu 31/1016:35LHR - SEA
Nonstop10h 25mKLM
Deal found 2/5£563
Fri 25/1013:30SEA - LHR
Nonstop9h 20mBritish Airways
Wed 6/1114:50LHR - SEA
Nonstop9h 55mBritish Airways
Deal found 1/5£563
Wed 18/919:40SEA - LHR
Nonstop9h 20mBritish Airways
Wed 25/909:50LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 2/5£575

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 903,063 searches. Data last updated 2 May 2024.
Consider one of these great deals we found on last-minute flights from Seattle to London. Users should be sure to double check the price, date, and time of their last-minute flight.
Sun 12/518:55SEA - LGW
1 stop32h 50mIcelandair
Sat 18/513:00LGW - SEA
1 stop12h 40mIcelandair
Deal found 1/5£636
Sun 12/518:55SEA - LHR
1 stop17h 25mIcelandair
Sat 18/513:05LHR - SEA
1 stop12h 35mIcelandair
Deal found 1/5£636
Sat 11/515:50SEA - LHR
1 stop20h 30mIcelandair
Sat 18/521:25LHR - SEA
1 stop31h 10mIcelandair
Deal found 1/5£639
Sat 11/518:55SEA - LHR
1 stop33h 00mIcelandair
Fri 17/521:25LHR - SEA
1 stop28h 15mIcelandair
Deal found 1/5£641
Tue 7/518:40SEA - LHR
1 stop18h 10mTurkish Airlines
Tue 21/518:00LHR - SEA
1 stop30h 45mTurkish Airlines
Deal found 1/5£643
Thu 9/518:55SEA - LHR
1 stop17h 25mIcelandair
Sat 18/513:05LHR - SEA
1 stop12h 35mIcelandair
Deal found 1/5£644
Sat 11/515:50SEA - LHR
1 stop20h 30mIcelandair
Sat 18/513:05LHR - SEA
1 stop12h 35mIcelandair
Deal found 30/4£645
Wed 8/518:40SEA - LGW
1 stop36h 20mTurkish Airlines
Mon 13/517:15LGW - SEA
1 stop31h 30mTurkish Airlines
Deal found 2/5£646
Wed 8/513:40SEA - LHR
2 stops20h 00mMultiple Airlines
Thu 16/506:40LHR - SEA
2 stops21h 48mMultiple Airlines
Deal found 1/5£650

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 903,063 searches. Data last updated 2 May 2024.
Take a look at some of the best available options we've come across on one-way flights from Seattle to London. For those needing a return trip from Seattle, there is a search form available above.
Mon 13/513:50SEA - LHR
1 stop14h 15mWestJet
Deal found 1/5£198
Sun 13/1015:50SEA - LGW
1 stop11h 55mIcelandair
Deal found 1/5£200
Mon 7/1015:50SEA - LHR
1 stop12h 05mIcelandair
Deal found 1/5£200
Wed 16/1015:50SEA - LGW
1 stop11h 55mIcelandair
Deal found 1/5£204
Wed 16/1015:50SEA - LHR
1 stop12h 05mIcelandair
Deal found 1/5£204
Wed 25/915:50SEA - LGW
1 stop11h 55mIcelandair
Deal found 1/5£205
Sun 22/918:55SEA - LHR
1 stop17h 25mIcelandair
Deal found 1/5£205
Sun 22/918:55SEA - LGW
1 stop32h 50mIcelandair
Deal found 1/5£206
Sun 13/1015:50SEA - LGW
1 stop11h 55mIcelandair
Deal found 1/5£209

Find flights from Seattle to London within your budget

Customise 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 903,063 searches. Data last updated 2 May 2024.

Fly from

Any airport

Fly to

Any airport

Budget

£456 - £525

Route

Depart

Return

Price

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 9/10

1 stop11h 55m

London Gatwick

Tue 12/11

1 stop15h 01m

£456

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 6/10

1 stop32h 50m

London Gatwick

Thu 31/10

1 stop13h 00m

£461

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 15/10

2 stops24h 11m

London Gatwick

Tue 29/10

2 stops33h 21m

£508

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 23/9

1 stop18h 20m

London Heathrow

Tue 8/10

2 stops17h 46m

£511

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 2/10

2 stops17h 10m

London Heathrow

Wed 9/10

2 stops37h 05m

£513

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 29/10

Nonstop9h 25m

London Heathrow

Tue 5/11

1 stop14h 00m

£518

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 24/9

Nonstop9h 35m

London Heathrow

Wed 2/10

Nonstop10h 25m

£523

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sat 12/10

1 stop21h 56m

London Heathrow

Tue 22/10

2 stops20h 15m

£524

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 6/10

1 stop14h 04m

London Heathrow

Thu 31/10

Nonstop9h 55m

£525

Flights are sorted by cheapest first

Deals found on 1/5

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

Use this chart to determine the optimal time to book a return 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 return from Seattle to London. Price data was last updated on 28 April 2024.
Morning
Midday
Afternoon
Evening
All times are departure.
Travellers seeking maximum savings on their Seattle to London flight should consider departing on Wednesday at midday when fares are most often at their lowest. Sunday mornings 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 £204 while a return flight costs £504. Price data was last updated on 28 April 2024.

Currently, January is the cheapest month in which you can book a flight from Seattle to London (average of £111). Flying from Seattle to London in June is currently the most expensive (average of £171). 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

£89

February

£99

March

£95

April

£102

May

£108

June

£137

July

£136

August

£116

September

£112

October

£127

November

£92

December

£97

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 2 May 2024.
Read through reviews of airlines operating flights from Seattle to London, such as Air Canada, Lufthansa and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.1
Very Good
10,858 reviews
Check prices

Boarding

8.2

Comfort

7.9

Crew

8.6

Entertainment

8.0

Overall

8.1

Food

7.4

Reviews

1 / 10

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

Delta
8.1
Very Good
10,858 reviews
Delta
8.1
Very Good
10,858 reviews
Check prices

Boarding

8.2

Comfort

7.9

Crew

8.6

Entertainment

8.0

Overall

8.1

Food

7.4

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
1,608 reviews
Delta
8.1
Very Good
10,858 reviews
Check prices

Boarding

8.2

Comfort

7.9

Crew

8.6

Entertainment

8.0

Overall

8.1

Food

7.4

Reviews

1 / 10

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

SWISS
7.8
Good
2,024 reviews
Delta
8.1
Very Good
10,858 reviews
Check prices

Boarding

8.2

Comfort

7.9

Crew

8.6

Entertainment

8.0

Overall

8.1

Food

7.4

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
1,376 reviews
Delta
8.1
Very Good
10,858 reviews
Check prices

Boarding

8.2

Comfort

7.9

Crew

8.6

Entertainment

8.0

Overall

8.1

Food

7.4

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
744 reviews
Delta
8.1
Very Good
10,858 reviews
Check prices

Boarding

8.2

Comfort

7.9

Crew

8.6

Entertainment

8.0

Overall

8.1

Food

7.4

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 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?

    Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to London. You should not have trouble finding flights to London from Seattle/Tacoma Intl; the airport handles an average of 19 outbound flights to London per day. You should also have plenty of airline options to choose from since 5 airlines have flights from the Seattle airport to London. 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 for under £500 on Cheapflights?

    Yes, there are multiple flights from Seattle to London for under £500. The cheapest flight booked recently is on Multiple Airlines for just £456, but on average you can expect to pay £478.

  • Are there nonstop flights from Seattle to London for under £600 on Cheapflights?

    Cheapflights has at least 20 direct flights from Seattle to London under £600. A good price for a nonstop flight from Seattle to London is less than £571.

  • 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 days are direct flights available from Seattle to London?

    You can find direct flights on the following days: Friday, Saturday.

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

    On average, you can expect to see 6 flights from Seattle to London a day.
    Afternoon (Midday - 6pm) - 100% of flight departures

  • How long is the flight from Seattle to London?

    Airlines like Icelandair fly from Seattle to London in about 32h 50m. The time it takes to get you to your destination can typically vary by up to . The distance from Seattle to London is about 4812 mi.

  • What is the cheapest airline to fly from Seattle to London round-trip?

    Cheapflights users have booked flights from Seattle to London round-trip from £461. Icelandair is currently priced 33% below the average price you’ll pay for this route.

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

    The most popular route from Seattle to London is Seattle/Tacoma Intl - London Heathrow. You may also consider Seattle/Tacoma Intl - London Gatwick or Seattle/Tacoma Intl - London City.

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

    The most popular airlines flying from Seattle to London are Air France, Finnair and British Airways. Something to consider prior to booking your flight.

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

    No one likes to see their flight delayed. When booking a flight from Seattle to London consider choosing Air France (78%), Delta (78%) or KLM (78%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Seattle to London?

    The cheapest flight price from Seattle to London is £375. On average you can expect to pay £1,209. The most popular route, (Seattle/Tacoma Intl - London Heathrow), can usually be booked for £449.

  • What does SEA to LHR mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Seattle/Tacoma Intl Airport to London Heathrow Airport flight would often be abbreviated as a SEA to LHR flight. While you’re still figuring out your travel plans, it’s not a bad idea to learn the names and codes of other airports around these areas: London Gatwick Airport (LGW), London Stansted Airport (STN), London Luton Airport (LTN), London City Airport (LCY), London Southend Airport (SEN).

  • 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 holiday 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 2/5.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from Seattle to London

Discover the top 5 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 903,063 searches. Data last updated 2 May 2024.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£433Average£535FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£511Average£733FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£532Average£651FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air FranceCheapest£536Average£622FlexibilityNo cancel feeOn-time77%
Search Air France flights
FinnairCheapest£540Average£710FlexibilityNo cancel feeOn-time76%
Search Finnair 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 2 May 2024.
1%of flight departuresEarly morningMidnight to 6 am
0%of flight departuresMorning6 am to noon
42%of flight departuresAfternoonNoon to 6 pm
57%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Midday
6 PM

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 2 May 2024.
Monday20daily flights
Tuesday15daily flights
Wednesday20daily flights
Thursday20daily flights
Friday20daily flights
Saturday20daily flights
Sunday20daily flights

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers 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?

Deals for Seattle to London flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights simply makes it quick and affordable to book flights from Seattle to London by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

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