What is the most punctual flight time for London to Seattle flights?

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

Which airline has the best punctuality record on London to Seattle flights?

Over the last year, Delta have had the lowest number of delays on this route, with just 6% of flights being delayed.

How often are flights from London to Seattle delayed?

About 13% of weekly flights between London and Seattle have experienced delays in the past year, with the average delay time being 119 minutes.

What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Wednesday has historically faced a higher average of delays compared to other days of the week.

How long is the flight from London Heathrow Airport to Seattle?

For as low as $532, United Airlines can have you in Seattle from London Heathrow Airport in 14h 45m. Airlines will cover a distance of 4783 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

Currently priced at $560, British Airways will fly you from London Heathrow Airport to Seattle and back. In addition to British Airways, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Virgin Atlantic and Delta - these airlines can fly you to your destination from $574 and $575, respectively. Users have found that British Airways is 25% cheaper than the other options available to this destination.

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

For one-way options, check prices for Scandinavian Airlines. According to our data, you can fly for as low as $383. Users have also found prices from $427 and $449 on Aer Lingus and WestJet, respectively.

Weekly flight availability from London Heathrow Airport to Seattle

The most flights from LHR to SEA are scheduled on a Monday (15 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (11 on average).

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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

The cheapest flight price from London Heathrow Airport to Seattle is $497. On average you can expect to pay $1,440. The most popular route, (London Heathrow - Seattle/Tacoma Intl), can usually be booked for $412.

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

The top 3 most reliable airlines when flying from London Heathrow Airport to Seattle are Scandinavian Airlines (95%), KLM (95%) and Air France (95%).

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

British Airways, Delta and Virgin Atlantic are the most popular airlines when flying from London Heathrow Airport to Seattle.

Most accurate provider : When it comes to deals on London Heathrow Airport-Seattle flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on London Heathrow Airport-Seattle flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-Seattle flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on London Heathrow Airport-Seattle flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London Heathrow Airport-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airport do you fly into for flights to Seattle from London Heathrow?

Located just 11.4 mi from the city center, Seattle/Tacoma Intl is the airport most travelers will use when flying to Seattle from London Heathrow. Booking flights from London Heathrow to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 12 daily inbound flights from London Heathrow from 4 different airlines.

Can I find deals for flights from Heathrow to Seattle that include hotel bookings?

Yes. In addition to deals on Heathrow to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Heathrow to Seattle?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Seattle.

Can I find deals for business class flights from Heathrow to Seattle?

Yes. Cheapflights offers flight deals from Heathrow to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$482+ Flights from London Heathrow Airport to Seattle

Q: How much does it cost to fly round-trip from London Heathrow Airport to Seattle?

Airfare is below average for this route at the moment. London Heathrow Airport to Seattle flights typically cost between $574 and $892 in January. The cheapest round-trip price found within the last 3 days was $526 on Multiple Airlines (Jan 22-Jan 25).

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Find cheap flights from Heathrow to Seattle with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from London Heathrow to Seattle/Tacoma Intl 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 Heathrow to Seattle

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$526 (Mytrip)
One-way from	$482 (Booking.com)
Popular in	July
Cheapest in	February
Average price	$682
Good round-trip deal	$604 or less
Good one-way deal	$596 or less

Provider with most accurate pricing for London Heathrow-Seattle/Tacoma Intl flight deals.

Search Deals

Provider most trusted by Cheapflights users for London Heathrow-Seattle/Tacoma Intl flights.

Search Deals

From London Heathrow to Seattle/Tacoma Intl

Search Deals

One-way flight from London Heathrow to Seattle/Tacoma Intl

Search Deals

Highest demand for flights based on searches. 13% potential increase in price ($114 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in January 2026

Search Deals

Price to beat on a round-trip flight from London Heathrow to Seattle/Tacoma Intl.

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Price to beat on a one-way flight from London Heathrow to Seattle/Tacoma Intl.

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Find flight deals from Heathrow to Seattle

Cheapest flights from Heathrow to Seattle
Explore the most affordable flight options available from Heathrow to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 8, 2026.

Thu 1/227:30 pmLHR - SEA

2 stops31h 46mMultiple Airlines

Sun 1/253:40 pmSEA - LHR

1 stop12h 10mMultiple Airlines

Deal found 1/8

$526

Tue 3/106:05 amLHR - SEA

2 stops25h 19mIberia

Tue 3/175:37 amSEA - LHR

1 stop18h 13mIberia

Deal found 1/8

$527

Wed 8/269:30 amLHR - SEA

2 stops20h 48mUnited Airlines

Wed 9/96:30 amSEA - LHR

1 stop19h 40mUnited Airlines

Deal found 1/8

$528

Wed 8/267:25 amLHR - SEA

2 stops19h 08mUnited Airlines

Mon 9/146:30 amSEA - LHR

1 stop19h 40mUnited Airlines

Deal found 1/7

$529

Wed 1/142:30 pmLHR - SEA

1 stop12h 46mAir Canada

Mon 1/195:50 amSEA - LHR

2 stops20h 20mAir Canada

Deal found 1/7

$530

Thu 7/26:55 amLHR - SEA

1 stop18h 04mUnited Airlines

Thu 7/3011:59 pmSEA - LHR

1 stop23h 41mUnited Airlines

Deal found 1/7

$531

Thu 1/156:30 amLHR - SEA

1 stop13h 40mLufthansa

Tue 1/209:55 amSEA - LHR

2 stops16h 15mLufthansa

Deal found 1/7

$532

Sun 2/13:00 pmLHR - SEA

2 stops26h 31mAir Canada

Thu 3/2610:05 amSEA - LHR

2 stops17h 05mAir Canada

Deal found 1/7

$533

Tue 9/111:45 amLHR - SEA

1 stop12h 50mKLM

Tue 9/89:50 pmSEA - LHR

Nonstop9h 45mKLM

Deal found 1/7

$534

Mon 1/1912:05 pmLHR - SEA

2 stops35h 56mUnited Airlines

Mon 2/28:10 amSEA - LHR

2 stops39h 20mUnited Airlines

Deal found 1/6

$535

Mon 4/276:30 amLHR - SEA

1 stop18h 00mDelta

Wed 5/69:45 pmSEA - LHR

Nonstop9h 50mDelta

Deal found 1/7

$536

Best flights from Heathrow to Seattle
Discover carefully curated flight deals from Heathrow to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 8, 2026.

Fri 2/136:35 amLHR - SEA

1 stop14h 45mUnited Airlines

Thu 2/199:00 amSEA - LHR

2 stops18h 05mUnited Airlines

Deal found 1/8

$532

Mon 4/278:40 amLHR - SEA

1 stop15h 50mDelta

Thu 5/71:40 pmSEA - LHR

1 stop14h 35mDelta

Deal found 1/7

$536

Wed 1/2112:20 pmLHR - SEA

Nonstop10h 29mVirgin Atlantic

Sun 1/259:55 pmSEA - LHR

1 stop14h 15mVirgin Atlantic

Deal found 1/7

$538

Thu 4/910:15 amLHR - SEA

2 stops17h 03mAir Canada

Mon 5/45:40 amSEA - LHR

2 stops22h 10mAir Canada

Deal found 1/8

$555

Tue 2/242:30 pmLHR - SEA

1 stop16h 21mUnited Airlines

Tue 3/39:00 amSEA - LHR

2 stops16h 10mUnited Airlines

Deal found 1/7

$533

Mon 4/278:40 amLHR - SEA

1 stop15h 50mDelta

Tue 5/56:20 pmSEA - LHR

Nonstop9h 50mDelta

Deal found 1/7

$536

Thu 2/1211:35 amLHR - SEA

1 stop14h 28mUnited Airlines

Thu 2/193:40 pmSEA - LHR

1 stop12h 10mUnited Airlines

Deal found 1/5

$536

Mon 2/212:20 pmLHR - SEA

Nonstop10h 25mDelta

Tue 2/174:55 pmSEA - LHR

Nonstop9h 35mDelta

Deal found 1/8

$536

Mon 1/1910:00 amLHR - SEA

2 stops38h 01mUnited Airlines

Mon 2/28:10 amSEA - LHR

2 stops39h 20mUnited Airlines

Deal found 1/7

$537

Sun 2/2211:35 amLHR - SEA

1 stop19h 24mUnited Airlines

Sun 3/16:45 amSEA - LHR

1 stop16h 45mUnited Airlines

Deal found 1/8

$537

Tue 2/103:20 pmLHR - SEA

2 stops17h 39mUnited Airlines

Fri 2/205:00 amSEA - LHR

2 stops16h 55mUnited Airlines

Deal found 1/8

$537

Last-minute flights from Heathrow to Seattle
Discover last-minute flight deals from Heathrow to Seattle. Data last updated January 8, 2026 and is based on user searches.

Wed 1/143:00 pmLHR - SEA

2 stops26h 15mAir Canada

Tue 1/205:50 amSEA - LHR

2 stops20h 20mAir Canada

Deal found 1/7

$530

Wed 1/147:40 amLHR - SEA

1 stop13h 40mMultiple Airlines

Wed 1/2110:58 amSEA - LHR

2 stops18h 02mMultiple Airlines

Deal found 1/7

$531

Thu 1/156:30 amLHR - SEA

1 stop13h 40mLufthansa

Tue 1/209:55 amSEA - LHR

2 stops16h 15mLufthansa

Deal found 1/7

$532

Mon 1/193:00 pmLHR - SEA

2 stops15h 06mAir Canada

Mon 2/23:40 pmSEA - LHR

1 stop12h 10mAir Canada

Deal found 1/8

$528

Mon 1/1912:05 pmLHR - SEA

2 stops35h 56mUnited Airlines

Mon 2/28:40 amSEA - LHR

1 stop17h 00mUnited Airlines

Deal found 1/6

$535

Thu 1/227:30 pmLHR - SEA

2 stops31h 46mMultiple Airlines

Sun 1/253:40 pmSEA - LHR

1 stop12h 10mMultiple Airlines

Deal found 1/8

$526

Wed 1/2812:20 pmLHR - SEA

Nonstop10h 29mDelta

Tue 2/104:55 pmSEA - LHR

Nonstop9h 35mDelta

Deal found 1/8

$536

Sun 2/12:30 pmLHR - SEA

1 stop27h 01mAir Canada

Thu 3/2610:05 amSEA - LHR

2 stops17h 05mAir Canada

Deal found 1/7

$533

Mon 2/212:20 pmLHR - SEA

Nonstop10h 25mVirgin Atlantic

Sun 2/89:55 pmSEA - LHR

1 stop24h 25mVirgin Atlantic

Deal found 1/7

$534

One-way flights from Heathrow to Seattle
Search for one-way flight options from Heathrow to Seattle. Find affordable one-way fares based on user searches. Data last updated January 8, 2026.

Thu 2/52:50 pmLHR - SEA

3 stops26h 25mMultiple Airlines

Deal found 1/7

$482

Thu 1/1512:15 pmLHR - SEA

1 stop12h 45mIcelandair

Deal found 1/7

$483

Sat 1/3112:15 pmLHR - SEA

1 stop12h 45mIcelandair

Deal found 1/6

$484

Sat 1/242:50 pmLHR - SEA

1 stop13h 02mMultiple Airlines

Deal found 1/8

$485

Wed 2/256:35 amLHR - SEA

2 stops24h 24mUnited Airlines

Deal found 1/7

$486

Tue 3/106:50 amLHR - SEA

2 stops22h 55mUnited Airlines

Deal found 1/6

$488

Fri 1/308:50 pmLHR - SEA

3 stops30h 15mMultiple Airlines

Deal found 1/8

$490

Wed 5/1310:15 pmLHR - SEA

2 stops29h 45mMultiple Airlines

Deal found 1/7

$492

Fri 2/278:35 pmLHR - SEA

1 stop28h 25mIcelandair

Deal found 1/7

$493

Wed 1/282:50 pmLHR - SEA

3 stops26h 08mMultiple Airlines

Deal found 1/7

$494

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 2/13

6:35 am-1:20 pm

1 stop14h 45m

Seattle/Tacoma Intl

Thu 2/19

9:00 am-11:05 am

2 stops18h 05m

$532

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 2/24

2:30 pm-10:51 pm

1 stop16h 21m

Seattle/Tacoma Intl

Tue 3/3

9:00 am-9:10 am

2 stops16h 10m

$533

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 4/27

8:40 am-4:30 pm

1 stop15h 50m

Seattle/Tacoma Intl

Thu 5/7

1:40 pm-12:15 pm

1 stop14h 35m

$536

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 4/27

8:40 am-4:30 pm

1 stop15h 50m

Seattle/Tacoma Intl

Tue 5/5

6:20 pm-12:10 pm

Nonstop9h 50m

$536

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 2/12

11:35 am-6:03 pm

1 stop14h 28m

Seattle/Tacoma Intl

Thu 2/19

3:40 pm-11:50 am

1 stop12h 10m

$536

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 2/2

12:20 pm-2:45 pm

Nonstop10h 25m

Seattle/Tacoma Intl

Tue 2/17

4:55 pm-10:30 am

Nonstop9h 35m

$536

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 1/19

10:00 am-4:01 pm

2 stops38h 01m

Seattle/Tacoma Intl

Mon 2/2

8:10 am-7:30 am

2 stops39h 20m

$537

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sun 2/22

11:35 am-10:59 pm

1 stop19h 24m

Seattle/Tacoma Intl

Sun 3/1

6:45 am-7:30 am

1 stop16h 45m

$537

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 2/10

3:20 pm-12:59 am

2 stops17h 39m

Seattle/Tacoma Intl

Fri 2/20

5:00 am-5:55 am

2 stops16h 55m

$537

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 1/21

12:20 pm-2:49 pm

Nonstop10h 29m

Seattle/Tacoma Intl

Sun 1/25

9:55 pm-8:10 pm

1 stop14h 15m

$538

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/6

Showing 1-10 of 21 results

Compare providers for flights from Heathrow to Seattle

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Heathrow to Seattle in January.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy2 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
Jetabroad	Price Accuracy3 stars	Trust Score*1 star
Priceline	Price Accuracy1 star	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on London Heathrow Airport-Seattle flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on London Heathrow Airport-Seattle flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-Seattle flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on London Heathrow Airport-Seattle flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London Heathrow Airport-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Heathrow to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Heathrow with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Seattle

Prices

Airlines

Delays

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

The best time to book flights from London Heathrow Airport to Seattle is 62 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from London Heathrow Airport to Seattle?

Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Seattle (average of $506). Flying from London Heathrow Airport to Seattle in July is currently the most expensive (average of $680). 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.

What is the cheapest time of day to fly from LHR to SEA?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Seattle as you normally would.

How much does it cost to fly round-trip from London Heathrow Airport to Seattle?

The best insider tips for London Heathrow Airport to Seattle flights

Cheapflights partnered with top experts to bring you the best recommendations for your London Heathrow Airport to Seattle trip

Airports

LHR

Expect long security lines at Heathrow. Ensure all liquids are in one small bag to avoid delays during manual screening.

SEA

Use the Link light rail from SEA to downtown Seattle. It's inexpensive, runs every 10 minutes, and takes less than 40 minutes.

Our travel experts

Ramsey Qubein

Expert on LHR

Brandon Schultz

Expert on SEA

Reviews of airlines servicing Seattle

Get a feel of what it's like to fly with Delta, Virgin Atlantic, and American Airlines from London Heathrow Airport to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

7.9

Good

8,026 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Delta

7.9

Good

8,026 reviews

Delta

7.9

Good

8,026 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

Virgin Atlantic

7.5

Good

678 reviews

Delta

7.9

Good

8,026 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

American Airlines

7.2

Good

11,097 reviews

Delta

7.9

Good

8,026 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

British Airways

6.7

Okay

7,657 reviews

Delta

7.9

Good

8,026 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

Related info for your journey

What airport do you fly into for flights to Seattle from London Heathrow?
Located just 11.4 mi from the city center, Seattle/Tacoma Intl is the airport most travelers will use when flying to Seattle from London Heathrow. Booking flights from London Heathrow to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 12 daily inbound flights from London Heathrow from 4 different airlines.
How long is the flight from London Heathrow Airport to Seattle?
For as low as $532, United Airlines can have you in Seattle from London Heathrow Airport in 14h 45m. Airlines will cover a distance of 4783 mi. Both multi-stop and nonstop flights can be found to your destination and back.
What are the cheapest airlines flying from London Heathrow Airport to Seattle round-trip?
Currently priced at $560, British Airways will fly you from London Heathrow Airport to Seattle and back. In addition to British Airways, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Virgin Atlantic and Delta - these airlines can fly you to your destination from $574 and $575, respectively. Users have found that British Airways is 25% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from London Heathrow Airport to Seattle one-way?
For one-way options, check prices for Scandinavian Airlines. According to our data, you can fly for as low as $383. Users have also found prices from $427 and $449 on Aer Lingus and WestJet, respectively.
What are the most reliable airlines from London Heathrow Airport to Seattle?
The top 3 most reliable airlines when flying from London Heathrow Airport to Seattle are Scandinavian Airlines (95%), KLM (95%) and Air France (95%).
What are the cheapest flights from London Heathrow Airport to Seattle?
The cheapest flight price from London Heathrow Airport to Seattle is $497. On average you can expect to pay $1,440. The most popular route, (London Heathrow - Seattle/Tacoma Intl), can usually be booked for $412.
Can I find deals for flights from Heathrow to Seattle that include hotel bookings?
Yes. In addition to deals on Heathrow to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Heathrow to Seattle?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Seattle.
Can I find deals for business class flights from Heathrow to Seattle?
Yes. Cheapflights offers flight deals from Heathrow to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from London Heathrow Airport to Seattle?
Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Seattle (average of $506). Flying from London Heathrow Airport to Seattle in July is currently the most expensive (average of $680). 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.

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Other flights to Seattle

Top 4 airlines flying from Heathrow to Seattle

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest$553	Average$755	FlexibilityNo cancel fee	On-time70%
Virgin Atlantic	Cheapest$574	Average$772	FlexibilityNo cancel fee	On-time72%
Delta	Cheapest$575	Average$860	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$589	Average$854	FlexibilityNo cancel fee	On-time71%

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$482+ Cheap flights from Heathrow (LHR) to Seattle (SEA)

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 2/5. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Heathrow to Seattle with Cheapflights

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Cheap flight deals from Heathrow to Seattle

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Most trusted provider

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Good round-trip deal

Good one-way deal

Find flight deals from Heathrow to Seattle

Cheapest flights from Heathrow to SeattleExplore the most affordable flight options available from Heathrow to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 8, 2026.

Explore the most affordable flight options available from Heathrow to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 8, 2026.

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Seattle that are best for you.

Compare providers for flights from Heathrow to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Heathrow to Seattle in January.

Best time to book a flight from Heathrow to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Heathrow with our price prediction graph.

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Everything you need to know about your flight from London Heathrow Airport to Seattle

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

What is the cheapest month to book a flight from London Heathrow Airport to Seattle?

What is the cheapest time of day to fly from LHR to SEA?

How much does it cost to fly round-trip from London Heathrow Airport to Seattle?

Weekly flight availability from London Heathrow Airport to Seattle

How often are flights from London to Seattle delayed?

What is the most punctual flight time for London to Seattle flights?

What day of the week experiences the fewest flight delays on this route?

Which airline has the best punctuality record on London to Seattle flights?

The best insider tips for London Heathrow Airport to Seattle flights

AI-powered summary based on content written by travel experts. AI can make mistakes.

Cheapflights partnered with top experts to bring you the best recommendations for your London Heathrow Airport to Seattle trip

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Reviews of airlines servicing Seattle

Get a feel of what it's like to fly with Delta, Virgin Atlantic, and American Airlines from London Heathrow Airport to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

How long is the flight from London Heathrow Airport to Seattle?

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

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

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

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

Can I find deals for flights from Heathrow to Seattle that include hotel bookings?

How can I find direct flights from Heathrow to Seattle?

Can I find deals for business class flights from Heathrow to Seattle?

What is the cheapest month to book a flight from London Heathrow Airport to Seattle?

Traveling to a place near Seattle?

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Alternative routes for Heathrow to Seattle

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Top 4 airlines flying from Heathrow to Seattle

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Cheapest flights from Heathrow to Seattle
Explore the most affordable flight options available from Heathrow to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 8, 2026.