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Cheap flights from Seattle to London from £164

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight to London departing on 19/3. 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
5 Mar — 12 Mar1
1 adult
Tue 5/3
Tue 12/3

The best prices from Seattle/Tacoma Intl to London are usually found in January or February, booked 58 days in advance, depart on a Sunday or Thursday 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 1 March 2024.

Popular in

June

Cheapest in

January

Average price

£551

Round-trip from

£59
High demand for flights, 24% potential price rise
Best time to find cheap flights, 22% potential price drop
Average for round-trip flights in February 2024
From Seattle/Tacoma Intl to London (LON)

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

Flying to your destination on a Thursday 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 £685, or £904 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 £680. You can even find prices in January for less than £680, as users have found deals to London from as low as £365. 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 evening tend to be the most expensive. A flight at midday could potentially save you up to 18% on airfare.

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 936,534 searches. Data last updated 1 March 2024.
Find some of the cheapest Lufthansa flights travelling from Seattle to London. Come back soon if you're not finding the exact deal you're looking for.
Wed 17/413:10SEA - LHR
1 stop16h 10mLufthansa
Wed 24/414:10LHR - SEA
1 stop30h 27mLufthansa
Deal found 29/2£477
Wed 6/315:20SEA - LHR
1 stop12h 30mLufthansa
Tue 30/414:10LHR - SEA
1 stop30h 17mLufthansa
Deal found 28/2£478
Wed 1/513:10SEA - LHR
1 stop16h 10mLufthansa
Tue 7/506:30LHR - SEA
2 stops15h 57mLufthansa
Deal found 28/2£488
Wed 1/513:10SEA - LHR
1 stop16h 10mLufthansa
Wed 8/514:10LHR - SEA
1 stop12h 17mLufthansa
Deal found 28/2£496
Wed 6/313:50SEA - LHR
1 stop17h 55mLufthansa
Wed 10/414:10LHR - SEA
1 stop30h 27mLufthansa
Deal found 29/2£506
Sun 10/314:50SEA - LGW
1 stop12h 45mLufthansa
Tue 19/317:50LGW - SEA
1 stop26h 00mLufthansa
Deal found 29/2£533
Tue 5/309:55SEA - LHR
2 stops16h 15mLufthansa
Sun 17/306:30LHR - SEA
1 stop13h 20mLufthansa
Deal found 29/2£535
Thu 7/309:55SEA - LHR
2 stops16h 15mLufthansa
Tue 12/313:00LHR - SEA
2 stops36h 26mLufthansa
Deal found 29/2£539
Thu 7/309:55SEA - LHR
2 stops16h 15mLufthansa
Tue 19/306:30LHR - SEA
2 stops19h 15mLufthansa
Deal found 29/2£543
  • One of the most popular airlines travelling from Seattle to London is Lufthansa. Flights from Lufthansa travelling this route typically cost £948.00 RT. This price is typically 50% cheaper than other airlines that offer Seattle to London flights. When booking this route, the cheapest RT price found was £612. 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 United Airlines flights from Seattle to London

Explore cheap flight options specifically provided by United Airlines 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 936,534 searches. Data last updated 1 March 2024.
Have a look at some of the cheapest available United Airlines flights departing from Seattle and landing in London. Check back soon if you're not seeing flights that suit your needs.
Tue 16/416:30SEA - LHR
1 stop30h 25mUnited Airlines
Fri 26/414:10LHR - SEA
1 stop30h 27mUnited Airlines
Deal found 29/2£485
Tue 30/423:59SEA - LHR
1 stop27h 36mUnited Airlines
Wed 8/518:00LHR - SEA
1 stop35h 43mUnited Airlines
Deal found 29/2£490
Tue 19/312:51SEA - LHR
1 stop13h 49mUnited Airlines
Wed 1/510:50LHR - SEA
2 stops20h 10mUnited Airlines
Deal found 29/2£496
Wed 24/412:50SEA - LHR
1 stop12h 50mUnited Airlines
Thu 2/506:30LHR - SEA
1 stop13h 55mUnited Airlines
Deal found 28/2£499
Sun 10/308:40SEA - LHR
1 stop15h 50mUnited Airlines
Tue 19/306:50LHR - SEA
2 stops20h 38mUnited Airlines
Deal found 29/2£500
Sun 10/319:30SEA - LHR
1 stop32h 50mUnited Airlines
Mon 18/313:30LHR - SEA
1 stop30h 20mUnited Airlines
Deal found 29/2£508
Thu 7/313:06SEA - LHR
1 stop34h 24mUnited Airlines
Tue 12/315:00LHR - SEA
1 stop36h 43mUnited Airlines
Deal found 29/2£534
Thu 7/308:40SEA - LHR
1 stop14h 50mUnited Airlines
Tue 19/306:30LHR - SEA
1 stop13h 20mUnited Airlines
Deal found 29/2£538
Tue 5/308:25SEA - LHR
2 stops16h 00mUnited Airlines
Sun 17/315:20LHR - SEA
2 stops27h 44mUnited Airlines
Deal found 29/2£549
  • If you’re travelling from Seattle to London, one of the more common airlines travelling that route is United Airlines. Flights on this route from United Airlines typically cost £886.96 RT, a price that is 55% cheaper than the average Seattle to London flight. The cheapest flight found was £674 RT. When travelling from Seattle to London on United Airlines, the most popular airport to depart from is Seattle/Tacoma Intl Airport and the most popular airport to arrive at is London Heathrow Airport. When flying from Seattle to London, United Airlines flights are 5% more popular than any other airline flying that same route.

Cheap Seattle to London flights in March & April 2024

Find cheap flight options from Seattle to London specifically for the months of March and April 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 936,534 searches. Prices were last updated on 1 March 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.
Sun 24/315:35SEA - LHR
1 stop12h 15mIcelandair
Tue 2/413:05LHR - SEA
1 stop12h 35mIcelandair
Deal found 29/2£457
Sun 24/315:35SEA - LHR
1 stop20h 55mIcelandair
Tue 2/421:25LHR - SEA
1 stop28h 15mIcelandair
Deal found 28/2£458
Sun 24/315:35SEA - LHR
1 stop12h 15mIcelandair
Wed 3/421:25LHR - SEA
1 stop28h 15mIcelandair
Deal found 29/2£470
Wed 6/315:20SEA - LHR
1 stop12h 30mLufthansa
Tue 30/414:10LHR - SEA
1 stop30h 17mLufthansa
Deal found 28/2£478
Sun 24/315:35SEA - LHR
1 stop12h 15mIcelandair
Sun 7/421:25LHR - SEA
1 stop28h 15mIcelandair
Deal found 29/2£481
Mon 25/315:20SEA - LHR
1 stop13h 30mMultiple Airlines
Wed 15/510:30LHR - SEA
2 stops19h 01mMultiple Airlines
Deal found 29/2£488
Tue 12/314:41SEA - LHR
1 stop33h 49mUnited Airlines
Tue 19/318:00LHR - SEA
1 stop33h 43mUnited Airlines
Deal found 29/2£490
Tue 19/309:35SEA - LHR
1 stop13h 55mMultiple Airlines
Thu 2/506:30LHR - SEA
2 stops15h 57mMultiple Airlines
Deal found 29/2£492
Tue 19/315:35SEA - LHR
1 stop20h 55mIcelandair
Tue 2/413:05LHR - SEA
1 stop12h 35mIcelandair
Deal found 29/2£494

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 936,534 searches. Data last updated 1 March 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.
Sun 24/315:35SEA - LHR
1 stop12h 15mIcelandair
Tue 2/413:05LHR - SEA
1 stop12h 35mIcelandair
Deal found 29/2£457
Sun 14/415:50SEA - LGW
1 stop11h 55mIcelandair
Wed 8/513:00LGW - SEA
1 stop12h 40mIcelandair
Deal found 28/2£458
Sun 24/315:35SEA - LHR
1 stop20h 55mIcelandair
Tue 2/421:25LHR - SEA
1 stop28h 15mIcelandair
Deal found 28/2£458
Sun 14/415:50SEA - LHR
1 stop12h 05mIcelandair
Wed 8/513:05LHR - SEA
1 stop12h 35mIcelandair
Deal found 28/2£459
Sun 14/415:50SEA - LGW
1 stop11h 55mIcelandair
Sun 5/513:00LGW - SEA
1 stop12h 40mIcelandair
Deal found 28/2£460
Thu 9/518:55SEA - LGW
1 stop32h 50mIcelandair
Thu 29/813:00LGW - SEA
1 stop12h 40mIcelandair
Deal found 29/2£461
Sun 14/415:50SEA - LHR
1 stop12h 05mIcelandair
Sat 11/513:05LHR - SEA
1 stop12h 35mIcelandair
Deal found 29/2£462
Sun 14/415:50SEA - LHR
1 stop12h 05mIcelandair
Sun 5/521:25LHR - SEA
1 stop28h 15mIcelandair
Deal found 28/2£462
Thu 9/518:55SEA - LGW
1 stop32h 50mIcelandair
Mon 13/513:00LGW - SEA
1 stop12h 40mIcelandair
Deal found 29/2£466

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 936,534 searches. Data last updated 1 March 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.
Tue 12/319:45SEA - LHR
Nonstop9h 20mAmerican Airlines
Tue 19/309:25LHR - SEA
Nonstop10h 00mAmerican Airlines
Deal found 29/2£495
Mon 22/419:40SEA - LHR
Nonstop9h 20mIberia
Tue 7/509:50LHR - SEA
Nonstop9h 45mIberia
Deal found 28/2£496
Tue 30/416:30SEA - LHR
Nonstop9h 20mVirgin Atlantic
Wed 8/512:45LHR - SEA
Nonstop9h 55mVirgin Atlantic
Deal found 29/2£500
Mon 8/413:30SEA - LHR
Nonstop9h 20mAmerican Airlines
Fri 19/409:50LHR - SEA
Nonstop9h 45mAmerican Airlines
Deal found 29/2£504
Tue 2/416:30SEA - LHR
Nonstop9h 20mVirgin Atlantic
Tue 16/412:45LHR - SEA
Nonstop9h 55mVirgin Atlantic
Deal found 29/2£509
Sun 17/318:55SEA - LHR
Nonstop9h 45mDelta
Fri 29/316:35LHR - SEA
Nonstop10h 25mDelta
Deal found 29/2£519
Wed 1/516:30SEA - LHR
Nonstop9h 20mDelta
Wed 8/516:50LHR - SEA
Nonstop10h 30mDelta
Deal found 28/2£519
Sun 28/419:40SEA - LHR
Nonstop9h 20mBritish Airways
Wed 8/509:50LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 28/2£529
Tue 7/516:30SEA - LHR
Nonstop9h 20mVirgin Atlantic
Tue 10/912:45LHR - SEA
Nonstop9h 55mVirgin Atlantic
Deal found 29/2£530

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 936,534 searches. Data last updated 1 March 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.
Wed 6/315:20SEA - LHR
1 stop12h 30mLufthansa
Tue 30/414:10LHR - SEA
1 stop30h 17mLufthansa
Deal found 28/2£478
Wed 6/315:20SEA - LHR
1 stop12h 30mLufthansa
Tue 30/412:40LHR - SEA
2 stops37h 47mLufthansa
Deal found 28/2£496
Sun 10/308:40SEA - LHR
1 stop15h 50mUnited Airlines
Tue 19/306:50LHR - SEA
2 stops20h 38mUnited Airlines
Deal found 29/2£500
Sun 10/309:55SEA - LHR
2 stops18h 25mAir Canada
Tue 19/313:00LHR - SEA
2 stops27h 16mAir Canada
Deal found 29/2£504
Wed 6/313:50SEA - LHR
1 stop17h 55mLufthansa
Wed 10/414:10LHR - SEA
1 stop30h 27mLufthansa
Deal found 29/2£506
Sun 10/319:30SEA - LHR
1 stop32h 50mUnited Airlines
Mon 18/313:30LHR - SEA
1 stop30h 20mUnited Airlines
Deal found 29/2£508
Sun 10/317:15SEA - LHR
Nonstop9h 25mDelta
Tue 19/306:20LHR - SEA
1 stop14h 05mDelta
Deal found 29/2£513
Wed 6/316:15SEA - LHR
Nonstop9h 25mVirgin Atlantic
Tue 30/420:55LHR - SEA
1 stop21h 20mVirgin Atlantic
Deal found 28/2£516
Sun 10/317:15SEA - LHR
Nonstop9h 25mDelta
Tue 19/312:25LHR - SEA
Nonstop9h 55mDelta
Deal found 29/2£519

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 936,534 searches. Data last updated 1 March 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.
Tue 19/322:12SEA - LGW
3 stops28h 48mMultiple Airlines
Deal found 29/2£164
Tue 23/421:35SEA - LGW
3 stops28h 25mMultiple Airlines
Deal found 29/2£183
Tue 16/421:35SEA - LGW
3 stops49h 25mMultiple Airlines
Deal found 28/2£189
Fri 29/323:59SEA - LGW
2 stops27h 01mMultiple Airlines
Deal found 28/2£192
Fri 24/515:30SEA - LHR
2 stops36h 30mWestJet
Deal found 28/2£193
Tue 7/521:35SEA - LGW
3 stops28h 25mMultiple Airlines
Deal found 29/2£202
Wed 27/318:31SEA - LGW
2 stops32h 29mMultiple Airlines
Deal found 29/2£202
Tue 23/410:44SEA - LGW
2 stops39h 16mMultiple Airlines
Deal found 29/2£203
Sat 11/513:50SEA - LHR
1 stop14h 10mWestJet
Deal found 29/2£207

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 936,534 searches. Data last updated 1 March 2024.

Fly from

Any airport

Fly to

Any airport

Budget

£458 - £511

Route

Depart

Return

Price

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 14/4

1 stop11h 55m

London Gatwick

Wed 8/5

1 stop12h 40m

£458

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 17/4

1 stop16h 10m

London Heathrow

Wed 24/4

1 stop30h 27m

£477

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 22/4

2 stops18h 10m

London Gatwick

Tue 7/5

2 stops28h 21m

£481

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 16/4

1 stop30h 25m

London Heathrow

Fri 26/4

1 stop30h 27m

£485

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 30/4

2 stops16h 40m

London Heathrow

Wed 15/5

2 stops15h 57m

£487

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 24/4

2 stops16h 40m

London Heathrow

Wed 1/5

1 stop15h 26m

£495

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 30/4

1 stop14h 43m

London Heathrow

Thu 9/5

Nonstop9h 45m

£500

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 24/4

1 stop14h 17m

London Gatwick

Fri 3/5

1 stop18h 25m

£503

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 25/3

1 stop13h 45m

London Heathrow

Mon 1/4

1 stop18h 16m

£511

Flights are sorted by cheapest first

Deals found on 28/2

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 25 February 2024.
Morning
Midday
Afternoon
Evening
All times are departure.
Travellers seeking maximum savings on their Seattle to London flight should consider departing on Monday at midday when fares are most often at their lowest. Friday evenings 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 £193 while a return flight costs £489. Price data was last updated on 25 February 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 July is currently the most expensive (average of £177). 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

£88

February

£99

March

£92

April

£108

May

£114

June

£132

July

£140

August

£109

September

£109

October

£126

November

£90

December

£93

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 1 March 2024.
Read through reviews of airlines operating flights from Seattle to London, such as Lufthansa, United Airlines and Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
8.1
Very Good
11,818 reviews

Comfort

7.9

Entertainment

8.1

Overall

8.1

Food

7.5

Crew

8.6

Boarding

8.2

Reviews

1 / 10

It was a good experience other than a short delay.

8.1
Very Good
11,818 reviews
8.1
Very Good
11,818 reviews

Comfort

7.9

Entertainment

8.1

Overall

8.1

Food

7.5

Crew

8.6

Boarding

8.2

Reviews

1 / 10

It was a good experience other than a short delay.

7.8
Good
2,258 reviews
8.1
Very Good
11,818 reviews

Comfort

7.9

Entertainment

8.1

Overall

8.1

Food

7.5

Crew

8.6

Boarding

8.2

Reviews

1 / 10

It was a good experience other than a short delay.

7.8
Good
1,766 reviews
8.1
Very Good
11,818 reviews

Comfort