Cheap flights from Seattle (SEA) to Heathrow (LHR) from $237

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 Heathrow Airport departing on 5/20. 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 — LHR
Mar 5 — Mar 121

The best prices from Seattle/Tacoma Intl to London Heathrow are usually found in February or January, booked 62 days in advance, depart on a Wednesday or Monday and return on a Wednesday

Cheap flight deals from Seattle to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Heathrow (LHR). 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 February 29, 2024.

Popular in

June

Cheapest in

February

Round-trip from

$644

One-way from

$264
High demand for flights, 24% potential price rise
Best time to find cheap flights, 23% potential price drop
From Seattle/Tacoma Intl to London Heathrow
One-way flight from Seattle/Tacoma Intl to London Heathrow

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

Departing on a Tuesday is a good option for securing a great price. You can expect to save up to 15% when planning your travel around this day of the week.

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

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 Heathrow Airport from $866 1-2 weeks out and tickets from $1,144 for flights departing within the next 72 hours.

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

The best pricing can be found in the month of January. Prices to London Heathrow Airport from Seattle average $860. You can even find prices in January for less than $860, as users have found deals to London Heathrow Airport from as low as $462. The month of June appears to be one of the more expensive times to travel to London Heathrow Airport from Seattle. Flying in the targeted month can save you up to 32%.

When is the cheapest time to fly from Seattle to London Heathrow Airport (SEA - LHR)?

When flying from Seattle to London Heathrow Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 18% versus a flight in the morning.

Cheap Icelandair flights from Seattle to Heathrow

Explore cheap flight options specifically provided by Icelandair for the route between Seattle and Heathrow. 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 3,314,962 searches. Data last updated February 29, 2024.
Take a peek at the cheapest Icelandair flights we've detected traveling from Seattle to London. Make sure to check back often as deals are often changing.
Sun 3/243:35 pmSEA - LHR
1 stop20h 55mIcelandair
Tue 4/29:25 pmLHR - SEA
1 stop28h 15mIcelandair
Deal found 2/28$557
Sun 4/143:50 pmSEA - LHR
1 stop20h 30mIcelandair
Thu 4/181:10 pmLHR - SEA
1 stop12h 30mIcelandair
Deal found 2/28$577
Sun 3/243:35 pmSEA - LHR
1 stop20h 55mIcelandair
Tue 4/29:25 pmLHR - SEA
1 stop28h 15mIcelandair
Deal found 2/28$579
Sun 4/143:50 pmSEA - LHR
1 stop12h 05mIcelandair
Wed 5/81:05 pmLHR - SEA
1 stop12h 35mIcelandair
Deal found 2/28$581
Sun 4/143:50 pmSEA - LHR
1 stop12h 05mIcelandair
Wed 5/11:05 pmLHR - SEA
1 stop12h 35mIcelandair
Deal found 2/28$583
Sun 4/143:50 pmSEA - LHR
1 stop20h 30mIcelandair
Sat 5/111:05 pmLHR - SEA
1 stop12h 35mIcelandair
Deal found 2/28$584
Sun 4/143:50 pmSEA - LHR
1 stop12h 05mIcelandair
Sun 5/59:25 pmLHR - SEA
1 stop28h 15mIcelandair
Deal found 2/28$585
Mon 4/223:50 pmSEA - LHR
1 stop12h 05mIcelandair
Mon 5/69:25 pmLHR - SEA
1 stop28h 15mIcelandair
Deal found 2/28$586
Sun 5/126:55 pmSEA - LHR
1 stop17h 25mIcelandair
Fri 5/249:25 pmLHR - SEA
1 stop21h 55mIcelandair
Deal found 2/28$590
  • One of the most popular airlines traveling from Seattle to London Heathrow Airport is Icelandair. Seattle to London Heathrow Airport flights are typically 47% cheaper than other airlines traveling the same route. Flights from Icelandair typically cost $1,182.80 RT. The cheapest Icelandair flight found for this route was $816. The most popular departure airport in Seattle when flying to London Heathrow Airport is Seattle/Tacoma Intl Airport. The most popular airport to fly into when visiting London Heathrow Airport is London Heathrow Airport. When flying from Seattle to London Heathrow Airport, Icelandair flights are 7% more popular than any other airline flying that same route.

Cheap British Airways flights from Seattle to Heathrow

Explore cheap flight options specifically provided by British Airways for the route between Seattle and Heathrow. 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 3,314,962 searches. Data last updated February 29, 2024.
Some of the best deals we've found on British Airways flights traveling from Seattle to London. Make sure to examine the flight information before completing your reservation.
Mon 3/187:45 pmSEA - LHR
Nonstop9h 20mBritish Airways
Tue 3/268:20 amLHR - SEA
1 stop18h 12mBritish Airways
Deal found 2/28$569
Sun 3/311:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Tue 4/169:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 2/28$618
Tue 4/301:32 pmSEA - LHR
1 stop14h 43mBritish Airways
Thu 5/99:45 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 2/28$632
Tue 3/127:45 pmSEA - LHR
Nonstop9h 20mBritish Airways
Thu 3/211:10 pmLHR - SEA
1 stop16h 10mBritish Airways
Deal found 2/28$636
Sun 5/51:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Wed 9/114:00 pmLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 2/28$658
Wed 4/247:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Thu 5/29:45 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 2/28$669
Sat 5/47:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Fri 9/139:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 2/28$677
Sat 4/207:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Thu 5/29:45 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 2/27$719
Sat 5/47:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Sun 9/89:45 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 2/28$728
  • British Airways is one of the most popular airlines used for those traveling from Seattle to London Heathrow Airport. Flights on this route from British Airways typically cost $1,022.11 RT, a price that is 56% more expensive than the average Seattle to London Heathrow Airport flight. The cheapest flight found was $644 RT. The most popular departure airport in Seattle when flying to London Heathrow Airport is Seattle/Tacoma Intl Airport. The most popular airport to fly into when visiting London Heathrow Airport is London Heathrow Airport. When flying from Seattle to London Heathrow Airport, British Airways flights are 5% more popular than any other airline flying that same route.

Cheap Seattle to Heathrow flights in February & March 2024

Find cheap flight options from Seattle to Heathrow specifically for the months of February and March 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,314,962 searches. Prices were last updated on February 29, 2024.
Listed are some of the best fares we've found on flights departing from Seattle to London in 2024. More deals are always being added, so be sure to check back regularly.
Sun 3/243:35 pmSEA - LHR
1 stop20h 55mIcelandair
Tue 4/29:25 pmLHR - SEA
1 stop28h 15mIcelandair
Deal found 2/28$557
Mon 3/187:45 pmSEA - LHR
Nonstop9h 20mBritish Airways
Tue 3/268:20 amLHR - SEA
1 stop18h 12mBritish Airways
Deal found 2/28$569
Sun 3/243:35 pmSEA - LHR
1 stop20h 55mIcelandair
Tue 4/29:25 pmLHR - SEA
1 stop28h 15mIcelandair
Deal found 2/28$579
Sun 3/243:35 pmSEA - LHR
1 stop12h 15mIcelandair
Thu 4/111:10 pmLHR - SEA
1 stop12h 30mIcelandair
Deal found 2/28$592
Sun 3/243:35 pmSEA - LHR
1 stop12h 15mIcelandair
Wed 4/39:25 pmLHR - SEA
1 stop28h 15mIcelandair
Deal found 2/28$594
Mon 3/253:35 pmSEA - LHR
1 stop20h 55mIcelandair
Wed 4/39:25 pmLHR - SEA
1 stop28h 15mIcelandair
Deal found 2/27$603
Wed 3/63:20 pmSEA - LHR
1 stop12h 30mLufthansa
Tue 4/302:10 pmLHR - SEA
1 stop30h 17mLufthansa
Deal found 2/28$605
Sun 3/243:35 pmSEA - LHR
1 stop12h 15mIcelandair
Sun 4/79:25 pmLHR - SEA
1 stop28h 15mIcelandair
Deal found 2/28$607
Sun 3/243:35 pmSEA - LHR
1 stop12h 15mIcelandair
Sun 4/79:25 pmLHR - SEA
1 stop28h 15mIcelandair
Deal found 2/29$608

Seattle to Heathrow 2024 flight deals

Discover exclusive flight deals for travel between Seattle and Heathrow in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,314,962 searches. Data last updated February 29, 2024.
Listed are some of the best fares we've found on flights departing from Seattle to London in 2024. More deals are always being added, so be sure to check back regularly.
Sun 3/243:35 pmSEA - LHR
1 stop20h 55mIcelandair
Tue 4/29:25 pmLHR - SEA
1 stop28h 15mIcelandair
Deal found 2/28$557
Mon 3/187:45 pmSEA - LHR
Nonstop9h 20mBritish Airways
Tue 3/268:20 amLHR - SEA
1 stop18h 12mBritish Airways
Deal found 2/28$569
Sun 4/143:50 pmSEA - LHR
1 stop20h 30mIcelandair
Thu 4/181:10 pmLHR - SEA
1 stop12h 30mIcelandair
Deal found 2/28$577
Sun 3/243:35 pmSEA - LHR
1 stop20h 55mIcelandair
Tue 4/29:25 pmLHR - SEA
1 stop28h 15mIcelandair
Deal found 2/28$579
Sun 4/143:50 pmSEA - LHR
1 stop12h 05mIcelandair
Wed 5/81:05 pmLHR - SEA
1 stop12h 35mIcelandair
Deal found 2/28$581
Sun 4/143:50 pmSEA - LHR
1 stop12h 05mIcelandair
Wed 5/11:05 pmLHR - SEA
1 stop12h 35mIcelandair
Deal found 2/28$583
Sun 4/143:50 pmSEA - LHR
1 stop20h 30mIcelandair
Sat 5/111:05 pmLHR - SEA
1 stop12h 35mIcelandair
Deal found 2/28$584
Sun 4/143:50 pmSEA - LHR
1 stop12h 05mIcelandair
Sun 5/59:25 pmLHR - SEA
1 stop28h 15mIcelandair
Deal found 2/28$585
Mon 4/223:50 pmSEA - LHR
1 stop12h 05mIcelandair
Mon 5/69:25 pmLHR - SEA
1 stop28h 15mIcelandair
Deal found 2/28$586

Non-stop flights to Heathrow from Seattle

Discover non-stop flight options from Seattle to Heathrow. 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 3,314,962 searches. Data last updated February 29, 2024.
To help reduce your travel time, choose from one of these non-stop flights from Seattle to London. Search for alternative flights from Seattle to London by utilizing the search form above.
Sun 3/311:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Tue 4/169:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 2/28$618
Mon 3/117:45 pmSEA - LHR
Nonstop9h 20mBritish Airways
Tue 3/199:25 amLHR - SEA
Nonstop10h 00mBritish Airways
Deal found 2/28$626
Mon 4/227:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Tue 5/74:00 pmLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 2/27$627
Tue 4/304:30 pmSEA - LHR
Nonstop9h 20mVirgin Atlantic
Wed 5/812:45 pmLHR - SEA
Nonstop9h 55mVirgin Atlantic
Deal found 2/29$632
Wed 4/247:45 pmSEA - LHR
Nonstop9h 45mVirgin Atlantic
Thu 5/212:45 pmLHR - SEA
Nonstop9h 55mVirgin Atlantic
Deal found 2/28$634
Tue 3/262:35 pmSEA - LHR
Nonstop9h 25mAmerican Airlines
Tue 4/24:00 pmLHR - SEA
Nonstop9h 45mAmerican Airlines
Deal found 2/28$638
Tue 4/24:30 pmSEA - LHR
Nonstop9h 20mVirgin Atlantic
Tue 4/1612:45 pmLHR - SEA
Nonstop9h 55mVirgin Atlantic
Deal found 2/29$644
Tue 5/74:30 pmSEA - LHR
Nonstop9h 20mVirgin Atlantic
Tue 9/1012:45 pmLHR - SEA
Nonstop9h 55mVirgin Atlantic
Deal found 2/29$647
Mon 4/17:40 pmSEA - LHR
Nonstop9h 20mAmerican Airlines
Tue 4/94:00 pmLHR - SEA
Nonstop9h 45mAmerican Airlines
Deal found 2/28$649

Seattle to Heathrow flights leaving soon

Find last-minute flight options from Seattle to Heathrow 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 3,314,962 searches. Data last updated February 29, 2024.
Have a look at some of the flights available from Seattle to London departing last-minute. It's wise to confirm all flight details are correct before booking.
Wed 3/63:20 pmSEA - LHR
1 stop12h 30mLufthansa
Tue 4/302:10 pmLHR - SEA
1 stop30h 17mLufthansa
Deal found 2/28$605
Wed 3/69:00 amSEA - LHR
1 stop14h 30mUnited Airlines
Wed 3/131:25 pmLHR - SEA
2 stops29h 19mUnited Airlines
Deal found 2/28$618
Sun 3/1011:50 pmSEA - LHR
1 stop25h 05mUnited Airlines
Tue 3/196:00 pmLHR - SEA
1 stop33h 43mUnited Airlines
Deal found 2/28$625
Tue 3/56:45 pmSEA - LHR
Nonstop9h 20mFinnair
Tue 3/129:25 amLHR - SEA
Nonstop10h 00mFinnair
Deal found 2/28$626
Wed 3/63:20 pmSEA - LHR
1 stop12h 30mLufthansa
Tue 4/3012:40 pmLHR - SEA
2 stops37h 47mLufthansa
Deal found 2/28$627
Sun 3/103:10 pmSEA - LHR
2 stops35h 30mUnited Airlines
Tue 3/196:00 pmLHR - SEA
1 stop33h 43mUnited Airlines
Deal found 2/28$630
Wed 3/612:32 pmSEA - LHR
1 stop15h 18mAmerican Airlines
Wed 3/132:50 pmLHR - SEA
Nonstop9h 55mAmerican Airlines
Deal found 2/28$631
Tue 3/53:20 pmSEA - LHR
1 stop12h 30mAir Canada
Tue 3/2612:00 pmLHR - SEA
1 stop15h 43mAir Canada
Deal found 2/28$632
Thu 3/72:41 pmSEA - LHR
1 stop32h 49mUnited Airlines
Sun 3/106:50 amLHR - SEA
2 stops20h 38mUnited Airlines
Deal found 2/28$634

One-way flights to Heathrow from Seattle

Search for one-way flight options from Seattle to Heathrow. 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 3,314,962 searches. Data last updated February 29, 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.
Mon 5/203:30 pmSEA - LHR
2 stops36h 35mWestJet
Deal found 2/28$237
Sun 5/197:00 amSEA - LHR
1 stop21h 05mWestJet
Deal found 2/28$241
Fri 5/243:30 pmSEA - LHR
2 stops36h 30mWestJet
Deal found 2/28$244
Wed 5/81:50 pmSEA - LHR
1 stop14h 15mWestJet
Deal found 2/28$249
Fri 5/31:50 pmSEA - LHR
1 stop14h 10mWestJet
Deal found 2/28$252
Thu 5/301:50 pmSEA - LHR
1 stop14h 15mWestJet
Deal found 2/28$262
Fri 5/31:50 pmSEA - LHR
1 stop14h 10mWestJet
Deal found 2/28$264
Tue 4/232:15 pmSEA - LHR
1 stop16h 25mLufthansa
Deal found 2/29$284
Tue 4/232:15 pmSEA - LHR
1 stop16h 25mLufthansa
Deal found 2/28$285

Find flights from Seattle to Heathrow within your budget

Customize your flight search to find flights from Seattle to Heathrow 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 3,314,962 searches. Data last updated February 29, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$557 - $652

Route

Depart

Return

Price

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 3/24

1 stop20h 55m

London Heathrow

Tue 4/2

1 stop28h 15m

$557

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 3/18

Nonstop9h 20m

London Heathrow

Tue 3/26

1 stop18h 12m

$569

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 4/30

1 stop14h 00m

London Heathrow

Tue 5/14

1 stop30h 17m

$604

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 5/6

2 stops16h 40m

London Heathrow

Thu 9/12

2 stops17h 46m

$612

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 4/14

1 stop16h 10m

London Heathrow

Wed 5/1

2 stops33h 39m

$615

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 3/24

1 stop13h 30m

London Heathrow

Tue 4/2

2 stops16h 12m

$619

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 3/10

Nonstop9h 25m

London Heathrow

Tue 3/19

1 stop14h 05m

$649

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 8/20

1 stop13h 32m

London Heathrow

Tue 8/27

1 stop16h 38m

$651

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 4/17

Nonstop9h 20m

London Heathrow

Tue 4/23

1 stop13h 05m

$652

Flights are sorted by cheapest first

Deals found on 2/28

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Heathrow. Price data was last updated on January 28, 2024.
Booking 62 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to London Heathrow Airport. 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 Heathrow Airport?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Heathrow. Price data was last updated on February 25, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Seattle to London Heathrow Airport flight should consider departing on Wednesday 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 Heathrow by month

Plan your trip from Seattle to Heathrow by taking into account the cheapest months to travel. The average price of a one-way flight from Seattle to Heathrow is currently $258 while a round-trip flight costs $614. Price data was last updated on February 25, 2024.

Currently, November is the cheapest month in which you can book a flight from Seattle to London Heathrow Airport (average of $652). Flying from Seattle to London Heathrow Airport in June is currently the most expensive (average of $1,189). 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

$713

April

$735

May

$770

June

$1,189

July

$1,016

August

$799

September

$751

October

$716

November

$652

December

$676

Temperature and rainfall in Heathrow by month

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

LON

Temperature

39.2 - 62.6 °F

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated February 29, 2024.
Peruse reviews from past customers who have flown with Icelandair, British Airways and Lufthansa from Seattle to London to help guide your decision. 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
11,818 reviews

Food

7.5

Entertainment

8.1

Comfort

7.9

Crew

8.6

Overall

8.1

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

Food

7.5

Entertainment

8.1

Comfort

7.9

Crew

8.6

Overall

8.1

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

Food

7.5

Entertainment

8.1

Comfort

7.9

Crew

8.6

Overall

8.1

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

Food

7.5

Entertainment

8.1

Comfort

7.9

Crew

8.6

Overall

8.1

Boarding

8.2

Reviews

1 / 10

It was a good experience other than a short delay.

7.8
Good
769 reviews
8.1
Very good
11,818 reviews

Food

7.5

Entertainment

8.1

Comfort

7.9

Crew

8.6

Overall

8.1

Boarding

8.2

Reviews

1 / 10

It was a good experience other than a short delay.

7.7
Good
1,376 reviews
8.1
Very good
11,818 reviews

Food

7.5

Entertainment

8.1

Comfort

7.9

Crew

8.6

Overall

8.1

Boarding

8.2

Reviews

1 / 10

It was a good experience other than a short delay.

Related info for your journey

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

Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to London Heathrow. You should not have trouble finding flights to London Heathrow from Seattle/Tacoma Intl; the airport handles an average of 19 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 16 airlines have flights from the Seattle airport to London Heathrow. 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 Heathrow Airport for under $600 on Cheapflights?

Yes, there are multiple flights from Seattle to London Heathrow Airport for under $600. The cheapest flight booked recently is on Icelandair for just $557, but on average you can expect to pay $589.

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

Cheapflights has at least 20 direct flights from Seattle to London Heathrow Airport under $700. A good price for a nonstop flight from Seattle to London Heathrow Airport is less than $653.

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

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

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

Our cheapest airline available from Seattle to London Heathrow Airport is Icelandair. Our recent data shows that you can find tickets from as low as $557 on this airline. Additional options worth looking into are British Airways and Lufthansa, starting at $569 and $604 round-trip. Icelandair is currently priced 37% below the average price you’ll pay for this route.

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

The cheapest airlines for a one-way flight from Seattle to London Heathrow Airport are WestJet ($237), Lufthansa ($284), and Icelandair ($341).

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

What are the most reliable airlines from Seattle to London Heathrow Airport?

No one likes to see their flight delayed. When booking a flight from Seattle to London Heathrow Airport consider choosing KLM (81%), Air France (81%) or Delta (81%) as they are the most reliable in getting you off to your destination on time.

What are the cheapest flights from Seattle to London Heathrow Airport?

Looking for the cheapest flight from Seattle to London Heathrow Airport? While on average our users pay $2,417, our data indicates the cheapest price to be $455. The most popular route (Seattle/Tacoma Intl - London Heathrow), is priced around $577.

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.

Browse thousands of different options on Cheapflights for your next trip

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Top 10 airlines flying from Seattle to Heathrow

Discover the top 10 airlines that operate flights from Seattle to Heathrow. 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 3,314,962 searches. Data last updated February 29, 2024.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$402Average$690FlexibilityNo cancel feeOn-time76%
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IcelandairCheapest$519Average$703FlexibilityNo cancel feeOn-time76%
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Aer LingusCheapest$527Average$845FlexibilityNo cancel feeOn-timeN/A
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United AirlinesCheapest$575Average$1,031FlexibilityNo cancel feeOn-time69%