Cheap flights from Seattle (SEA) to London (LON) from $229

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 5/8. 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
Mar 24 — Mar 311

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 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 March 19, 2024.

Popular in

June

Cheapest in

January

Round-trip from

$644

One-way from

$229
High demand for flights, 24% potential price rise
Best time to find cheap flights, 22% potential price drop
From Seattle/Tacoma Intl to London (LON)
One-way flight from Seattle/Tacoma Intl to London (LON)

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 13% on airfare.

Cheap Aer Lingus flights from Seattle to London

Explore cheap flight options specifically provided by Aer Lingus 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 3,145,932 searches. Data last updated March 19, 2024.
Peruse some of the lowest-priced Aer Lingus flights we've found from Seattle to London. Deals update often to give you more flight options matching your criteria
Wed 4/176:45 pmSEA - LHR
1 stop14h 35mAer Lingus
Wed 5/112:00 pmLHR - SEA
1 stop13h 01mAer Lingus
Deal found 3/18$576
Wed 4/176:45 pmSEA - LHR
1 stop13h 10mAer Lingus
Wed 4/2412:00 pmLHR - SEA
1 stop13h 01mAer Lingus
Deal found 3/18$577
Mon 4/226:45 pmSEA - LHR
1 stop14h 35mAer Lingus
Wed 4/2412:00 pmLHR - SEA
1 stop13h 01mAer Lingus
Deal found 3/18$578
Mon 3/259:05 pmSEA - LGW
1 stop14h 40mAer Lingus
Fri 3/291:00 pmLGW - SEA
1 stop13h 15mAer Lingus
Deal found 3/18$1,580
  • Aer Lingus is one of the most popular airlines used for those traveling from Seattle to London. Flights on this route from Aer Lingus typically cost $1,184.65 RT, a price that is 49% more expensive than the average Seattle to London flight. The cheapest flight found was $867 RT. When traveling from Seattle to London on Aer Lingus, 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, Aer Lingus flights are 7% 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 3,145,932 searches. Data last updated March 19, 2024.
Some of the lowest-priced Delta 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 4/237:30 pmSEA - LHR
Nonstop9h 45mDelta
Thu 5/26:15 amLHR - SEA
1 stop13h 05mDelta
Deal found 3/19$583
Thu 4/184:30 pmSEA - LHR
Nonstop9h 20mDelta
Wed 4/249:00 amLHR - SEA
1 stop16h 41mDelta
Deal found 3/18$632
Sun 4/286:10 pmSEA - LCY
1 stop29h 05mDelta
Mon 5/137:45 amLCY - SEA
1 stop34h 30mDelta
Deal found 3/18$638
Wed 4/104:30 pmSEA - LHR
Nonstop9h 20mDelta
Wed 4/2412:45 pmLHR - SEA
Nonstop9h 55mDelta
Deal found 3/18$696
Mon 3/256:55 pmSEA - LHR
Nonstop9h 45mDelta
Tue 4/96:15 amLHR - SEA
1 stop19h 26mDelta
Deal found 3/18$796
Mon 3/256:55 pmSEA - LHR
Nonstop9h 45mDelta
Fri 4/58:40 amLHR - SEA
1 stop16h 00mDelta
Deal found 3/18$798
Mon 3/252:10 pmSEA - LHR
1 stop13h 40mDelta
Fri 4/1212:45 pmLHR - SEA
Nonstop9h 55mDelta
Deal found 3/18$807
Sun 3/245:15 pmSEA - LHR
Nonstop9h 25mDelta
Wed 4/109:00 amLHR - SEA
1 stop16h 41mDelta
Deal found 3/18$836
Sun 3/245:15 pmSEA - LHR
Nonstop9h 25mDelta
Mon 4/19:55 amLHR - SEA
1 stop32h 25mDelta
Deal found 3/19$980
  • One of the most popular airlines traveling from Seattle to London is Delta. Flights from Delta traveling this route typically cost $1,008.11 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 $641. 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, Delta 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 3,145,932 searches. Prices were last updated on March 19, 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.
Mon 4/2211:43 amSEA - LGW
1 stop14h 17mVirgin Atlantic
Thu 5/212:00 pmLGW - SEA
1 stop18h 24mVirgin Atlantic
Deal found 3/18$567
Tue 4/305:55 amSEA - LHR
1 stop17h 20mVirgin Atlantic
Wed 5/89:20 amLHR - SEA
1 stop15h 40mVirgin Atlantic
Deal found 3/18$569
Mon 4/2212:59 amSEA - LGW
2 stops21h 36mAmerican Airlines
Thu 5/912:20 pmLGW - SEA
2 stops30h 48mAmerican Airlines
Deal found 3/18$570
Tue 4/237:20 amSEA - LGW
1 stop18h 40mVirgin Atlantic
Thu 5/912:00 pmLGW - SEA
2 stops18h 27mVirgin Atlantic
Deal found 3/18$571
Wed 4/176:45 pmSEA - LHR
1 stop13h 10mAer Lingus
Wed 4/2412:00 pmLHR - SEA
1 stop13h 01mAer Lingus
Deal found 3/18$577
Wed 4/174:30 pmSEA - LHR
Nonstop9h 20mVirgin Atlantic
Wed 4/2411:30 amLHR - SEA
1 stop14h 11mVirgin Atlantic
Deal found 3/18$582
Tue 4/167:43 pmSEA - LHR
1 stop30h 42mMultiple Airlines
Wed 4/243:50 pmLHR - SEA
1 stop37h 03mMultiple Airlines
Deal found 3/18$583
Sun 4/287:30 pmSEA - LHR
Nonstop9h 45mDelta
Wed 5/811:45 amLHR - SEA
1 stop12h 55mDelta
Deal found 3/18$584
Sun 4/287:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Thu 5/99:45 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 3/18$585

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 3,145,932 searches. Data last updated March 19, 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.
Sun 11/32:35 pmSEA - LHR
1 stop20h 45mIcelandair
Thu 11/148:25 pmLHR - SEA
1 stop28h 35mIcelandair
Deal found 3/18$551
Tue 10/83:50 pmSEA - LHR
1 stop12h 05mIcelandair
Thu 10/179:25 pmLHR - SEA
1 stop28h 35mIcelandair
Deal found 3/18$556
Sun 12/12:35 pmSEA - LHR
1 stop20h 45mIcelandair
Thu 12/128:25 pmLHR - SEA
1 stop28h 35mIcelandair
Deal found 3/18$557
Wed 5/17:20 amSEA - LHR
1 stop19h 50mVirgin Atlantic
Sat 5/116:15 amLHR - SEA
1 stop13h 05mVirgin Atlantic
Deal found 3/18$562
Wed 10/163:50 pmSEA - LHR
1 stop12h 05mIcelandair
Fri 10/259:25 pmLHR - SEA
1 stop28h 30mIcelandair
Deal found 3/18$563
Mon 4/2211:43 amSEA - LGW
1 stop14h 17mVirgin Atlantic
Thu 5/212:00 pmLGW - SEA
1 stop18h 24mVirgin Atlantic
Deal found 3/18$567
Tue 9/246:55 pmSEA - LGW
1 stop32h 50mIcelandair
Tue 10/151:00 pmLGW - SEA
1 stop12h 55mIcelandair
Deal found 3/19$568
Tue 4/305:55 amSEA - LHR
1 stop17h 20mVirgin Atlantic
Wed 5/89:20 amLHR - SEA
1 stop15h 40mVirgin Atlantic
Deal found 3/18$569
Mon 4/2212:59 amSEA - LGW
2 stops21h 36mAmerican Airlines
Thu 5/912:20 pmLGW - SEA
2 stops30h 48mAmerican Airlines
Deal found 3/18$570

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 3,145,932 searches. Data last updated March 19, 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.
Sun 4/287:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Thu 5/99:45 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 3/18$584
Sun 4/287:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Thu 5/99:45 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 3/18$585
Sun 4/287:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Thu 5/99:45 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 3/18$587
Sun 4/287:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Tue 5/149:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 3/18$588
Sun 4/287:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Thu 5/99:45 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 3/18$589
Sun 4/287:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Fri 5/109:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 3/18$590
Sun 4/287:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Wed 5/89:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 3/18$591
Wed 5/17:35 pmSEA - LHR
Nonstop9h 40mVirgin Atlantic
Sat 5/114:50 pmLHR - SEA
Nonstop10h 30mVirgin Atlantic
Deal found 3/18$593
Sun 4/287:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Tue 5/149:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 3/18$608

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 3,145,932 searches. Data last updated March 19, 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.
Tue 3/2611:50 pmSEA - LHR
1 stop13h 55mJetBlue
Tue 4/28:25 amLHR - SEA
1 stop20h 20mJetBlue
Deal found 3/18$773
Mon 3/259:35 amSEA - LHR
1 stop13h 55mMultiple Airlines
Thu 4/118:30 amLHR - SEA
2 stops17h 57mMultiple Airlines
Deal found 3/18$783
Tue 3/265:15 pmSEA - LHR
Nonstop9h 25mVirgin Atlantic
Tue 4/212:45 pmLHR - SEA
Nonstop9h 55mVirgin Atlantic
Deal found 3/18$784
Mon 3/259:41 amSEA - LGW
3 stops38h 14mMultiple Airlines
Mon 4/82:00 pmLGW - SEA
2 stops26h 51mMultiple Airlines
Deal found 3/18$791
Mon 3/252:41 pmSEA - LHR
1 stop14h 19mUnited Airlines
Thu 4/46:30 amLHR - SEA
1 stop13h 55mUnited Airlines
Deal found 3/18$793
Mon 3/259:35 amSEA - LHR
1 stop13h 55mMultiple Airlines
Tue 4/910:50 amLHR - SEA
2 stops19h 02mMultiple Airlines
Deal found 3/18$795
Mon 3/256:55 pmSEA - LHR
Nonstop9h 45mDelta
Tue 4/96:15 amLHR - SEA
1 stop19h 26mDelta
Deal found 3/18$796
Mon 3/256:55 pmSEA - LHR
Nonstop9h 45mDelta
Fri 4/58:40 amLHR - SEA
1 stop16h 00mDelta
Deal found 3/18$798
Tue 3/2611:00 pmSEA - LHR
1 stop14h 35mUnited Airlines
Tue 4/26:00 pmLHR - SEA
2 stops32h 45mUnited Airlines
Deal found 3/18$801

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 3,145,932 searches. Data last updated March 19, 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.
Wed 5/81:50 pmSEA - LHR
1 stop14h 15mWestJet
Deal found 3/18$229
Mon 5/207:00 amSEA - LHR
1 stop21h 05mWestJet
Deal found 3/18$230
Wed 5/15:58 pmSEA - LGW
2 stops29h 02mMultiple Airlines
Deal found 3/18$241
Tue 3/2610:12 pmSEA - LGW
3 stops52h 48mMultiple Airlines
Deal found 3/18$251
Tue 3/2610:12 pmSEA - LGW
2 stops52h 48mMultiple Airlines
Deal found 3/18$252
Sat 5/257:00 amSEA - LHR
1 stop21h 00mWestJet
Deal found 3/18$255
Wed 4/38:25 pmSEA - LGW
2 stops29h 35mMultiple Airlines
Deal found 3/18$263
Tue 4/29:22 amSEA - LGW
3 stops40h 38mMultiple Airlines
Deal found 3/18$274
Wed 4/179:19 pmSEA - LGW
2 stops29h 36mMultiple Airlines
Deal found 3/18$277

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 3,145,932 searches. Data last updated March 19, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$562 - $609

Route

Depart

Return

Price

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 5/1

1 stop19h 50m

London Heathrow

Sat 5/11

1 stop13h 05m

$562

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 4/17

1 stop14h 35m

London Heathrow

Wed 5/1

1 stop13h 01m

$576

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 4/23

Nonstop9h 45m

London Heathrow

Thu 5/2

1 stop13h 05m

$583

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 4/28

Nonstop9h 20m

London Heathrow

Thu 5/9

Nonstop9h 45m

$584

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 4/16

1 stop22h 06m

London Heathrow

Tue 4/23

2 stops23h 55m

$594

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 4/21

2 stops16h 45m

London Heathrow

Tue 5/7

1 stop15h 48m

$601

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 4/17

2 stops20h 45m

London Gatwick

Wed 4/24

2 stops36h 00m

$603

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 4/17

2 stops16h 40m

London Heathrow

Wed 4/24

2 stops18h 20m

$605

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 4/17

1 stop14h 00m

London Heathrow

Wed 4/24

1 stop13h 55m

$609

Flights are sorted by cheapest first

Deals found on 3/18

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 March 10, 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.
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 $252 while a round-trip flight costs $591. Price data was last updated on March 10, 2024.

Currently, November is the cheapest month in which you can book a flight from Seattle to London (average of $652). Flying from Seattle to London in June is currently the most expensive (average of $1,187). 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

$665

March

$715

April

$732

May

$771

June

$1,187

July

$1,013

August

$793

September

$753

October

$715

November

$652

December

$674

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 March 19, 2024.
See what other customers who have flown with Aer Lingus, Delta and Air Canada 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.
8.1
Very good
9,150 reviews

Crew

8.6

Food

7.3

Entertainment

7.4

Comfort

7.9

Overall

8.1

Boarding

8.2

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

8.1
Very good
9,150 reviews
8.1
Very good
9,150 reviews

Crew

8.6

Food

7.3

Entertainment

7.4

Comfort

7.9

Overall

8.1

Boarding

8.2

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

8.1
Very good
11,551 reviews
8.1
Very good
9,150 reviews

Crew

8.6

Food

7.3

Entertainment

7.4

Comfort

7.9

Overall

8.1

Boarding

8.2

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

7.8
Good
2,183 reviews
8.1
Very good
9,150 reviews

Crew

8.6

Food

7.3

Entertainment

7.4

Comfort

7.9

Overall

8.1

Boarding

8.2

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

7.8
Good
1,720 reviews
8.1
Very good
9,150 reviews

Crew

8.6

Food

7.3

Entertainment

7.4

Comfort

7.9

Overall

8.1

Boarding

8.2

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

7.8
Good
1,376 reviews
8.1
Very good
9,150 reviews

Crew

8.6

Food

7.3

Entertainment

7.4

Comfort

7.9

Overall

8.1

Boarding

8.2

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines 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?

    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 Virgin Atlantic for just $562, but on average you can expect to pay $584.

  • 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 $613.

  • Are there last-minute flights available from Seattle to London for under $800?

    There are currently 20+ open flights from Seattle to London within the next 7 days for less than $800.

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

    Cheapflights users have booked flights from Seattle to London round-trip from $562. Other airlines that can offer you cheap pricing are Aer Lingus, from $576, and Delta, from $583. Users have found that Virgin Atlantic is 34% cheaper than the other options available to this destination.

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

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

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

    Consider KLM (88%), Air France (88%) or Delta (88%) 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 $452. While the most popular route (Seattle/Tacoma Intl - London Heathrow) can be booked for $572 on average our data indicates $2,177 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?

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

    Reykjavik travelers tend to visit Hallgrímskirkja, Harpa, and Perlan more than anywhere else. Hallgrímskirkja, Harpa, and Perlan are located about 23.2 mi, 23.3 mi, and 23.0 mi, respectively from Reykjavik Keflavik Intl. Travelers in need of a car in Reykjavik can rent one for about $55 per day.

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

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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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 March 19, 2024.

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 3,145,932 searches. Data last updated March 19, 2024.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$402Average$692FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air FranceCheapest$514Average$877FlexibilityNo cancel feeOn-time77%
Search Air France flights
IcelandairCheapest$519Average$712FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest$527Average$851FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
United AirlinesCheapest$575Average$952FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
FinnairCheapest$586Average$940FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IberiaCheapest$588Average$879FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Air CanadaCheapest$602Average$915FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
British AirwaysCheapest$636Average$918FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest$637Average$922FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

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.

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 March 19, 2024.
1%of flight departuresEarly morningMidnight to 6 am
0%of flight departuresMorning6 am to noon
69%of flight departuresAfternoonNoon to 6 pm
30%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
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 March 19, 2024.
Sunday20daily flights
Monday20daily flights
Tuesday15daily flights
Wednesday20daily flights
Thursday20daily flights
Friday20daily flights
Saturday20daily flights

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

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.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Seattle to London.

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

Yes! Cheapflights helps users easily find flights from Seattle to London with no change fees.

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

Not ready to book yet? You can track prices for flights from Seattle to London on Cheapflights with our Price Alert feature and get notified when better prices are available.

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