What is the cheapest airline that flies from Seattle/Tacoma Intl to London Heathrow?

Icelandair, WestJet, and Scandinavian Airlines are the most popular carriers operating from Seattle/Tacoma Intl to London Heathrow

How often are flights from Seattle to London delayed?

Historically, on average around 17% of flights between Seattle and London have experienced a delay on any given week. The average delay length over the past 12 months has been 130 minutes.

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

According to our data, Aeromexico have had the least number of delays on this route over the last 12 months; with about 9% of their flights experiencing any sort of delay.

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

Friday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

Which layover airport offers the lowest fares from Seattle to London Heathrow Airport?

Flights via Reykjavik (KEF) offer the lowest average round-trip price of $917.

How many flights depart from Seattle to London Heathrow Airport on average per week?

57 flights are operational weekly from Seattle to London Heathrow Airport as of October 2025. The most popular departure day for this route is Wed, with 37% of flights per week taking off on this day.

What airlines fly to London Heathrow Airport?

British Airways, Delta and Virgin Atlantic are the top three most popular airlines that fly to London Heathrow Airport from Seattle according to our data. British Airways is the first choice among our users, with 39% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 14 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

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

As of October 2025, 8 flights take off from Seattle and land in London Heathrow Airport each day. The most common flight departure time for this route is 8:00PM, with 50% of daily flights taking off in the evening.

Which airport is the most popular layover for flights between Seattle and London Heathrow Airport?

Reykjavik (KEF) was the most common stop: 79% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest connection time from Seattle to London Heathrow Airport?

Dublin (DUB) has the shortest average layover time for this route: 1h 54m.

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

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

Which layover airport has the shortest travel time from Seattle to London Heathrow Airport?

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 12h 16m.

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to London Heathrow Airport?

Prices for flights from Seattle/Tacoma Intl Airport to London Heathrow Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to London Heathrow Airport?

The number of operators available for flights from Seattle/Tacoma Intl Airport to London Heathrow Airport is 14 as of October 2025.

How old do you have to be to fly from Seattle/Tacoma Intl Airport to London Heathrow Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to London Heathrow Airport.

What documentation or ID do you need to fly to London Heathrow Airport?

The travel and health documents you'll need for your trip to London Heathrow Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Heathrow Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$332 Cheap Flights from Seattle to London Heathrow Airport in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Seattle to London

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:45 pm - 11:55 amSEA-LHR

12h 10m1 stop

1:05 pm - 8:45 pmLHR-SEA

15h 40m1 stop

$517Icelandair

Find Deal

mié., abr. 1 - mié., abr. 8

2:35 pm - 7:30 pmSEA-LHR

20h 55m1 stop

12:15 pm - 5:00 pmLHR-SEA

12h 45m1 stop

$521Icelandair

Find Deal

mar., nov. 4 - mar., nov. 25

2:35 pm - 10:50 amSEA-LHR

12h 15m1 stop

8:35 pm - 5:00 pmLHR-SEA

28h 25m1 stop

$522Icelandair

Find Deal

lun., nov. 24 - mar., dic. 2

3:35 pm - 7:30 pmSEA-LHR

20h 55m1 stop

9:25 pm - 8:45 pmLHR-SEA

31h 20m1 stop

$523Icelandair

Find Deal

dom., mar. 22 - dom., mar. 29

7:20 pm - 12:50 pmSEA-LHR

9h 30mnonstop

6:20 am - 11:25 amLHR-SEA

13h 05m1 stop

$550Virgin Atlantic

Find Deal

mar., nov. 11 - mar., nov. 25

7:20 pm - 12:50 pmSEA-LHR

9h 30mnonstop

2:45 pm - 4:50 pmLHR-SEA

10h 05mnonstop

$557Virgin Atlantic

Find Deal

mar., nov. 11 - mar., nov. 25

4:48 pm - 10:30 amSEA-LHR

9h 42mnonstop

6:20 am - 1:20 pmLHR-SEA

15h 00m1 stop

$577Air France

Find Deal

mié., nov. 12 - mié., nov. 19

7:20 pm - 12:50 pmSEA-LHR

9h 30mnonstop

6:20 am - 11:25 amLHR-SEA

13h 05m1 stop

$578Delta

Find Deal

mar., nov. 4 - jue., nov. 20

7:20 pm - 12:50 pmSEA-LHR

9h 30mnonstop

11:45 am - 11:45 amLHR-SEA

32h 00m1 stop

$579Delta

Find Deal

mar., nov. 11 - lun., nov. 24

6:50 pm - 12:20 pmSEA-LHR

9h 30mnonstop

2:55 pm - 4:55 pmLHR-SEA

10h 00mnonstop

$588British Airways

Find Deal

mié., feb. 18 - vie., feb. 27

Lufthansa flights from Seattle to London Heathrow Airport

Our best Lufthansa deals on Seattle to London Heathrow Airport flight tickets

Lufthansa

Oct 28

SEA3:40 pmSeattle/Tacoma Intl

13h 10m

1 stop

LHR11:50 amLondon Heathrow

Nov 21

LHR7:40 amLondon Heathrow

13h 40m

1 stop

SEA1:20 pmSeattle/Tacoma Intl

$561

Find similar

Lufthansa

Dec 3

SEA3:10 pmSeattle/Tacoma Intl

13h 50m

1 stop

LHR1:00 pmLondon Heathrow

Dec 10

LHR7:40 amLondon Heathrow

13h 40m

1 stop

SEA1:20 pmSeattle/Tacoma Intl

$570

Find similar

Lufthansa

Nov 26

SEA10:05 amSeattle/Tacoma Intl

17h 45m

1 stop

LHR11:50 amLondon Heathrow

Dec 5

LHR7:40 amLondon Heathrow

19h 36m

2 stops

SEA7:16 pmSeattle/Tacoma Intl

$574

Find similar

British Airways flights from Seattle to London Heathrow Airport

Our best British Airways deals on Seattle to London Heathrow Airport flight tickets

British Airways

Feb 18

SEA6:50 pmSeattle/Tacoma Intl

9h 30m

LHR12:20 pmLondon Heathrow

Feb 27

LHR2:55 pmLondon Heathrow

10h 00m

SEA4:55 pmSeattle/Tacoma Intl

$588

Find similar

British Airways

Oct 30

SEA11:44 amSeattle/Tacoma Intl

13h 51m

1 stop

LHR8:35 amLondon Heathrow

Nov 11

LHR1:10 pmLondon Heathrow

17h 10m

1 stop

SEA10:20 pmSeattle/Tacoma Intl

$643

Find similar

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

mié. 4/1

3:45 pm-11:55 am

1 stop12h 10m

London Heathrow

mié. 4/8

1:05 pm-8:45 pm

1 stop15h 40m

$517

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

mar. 11/4

2:35 pm-7:30 pm

1 stop20h 55m

London Heathrow

mar. 11/25

12:15 pm-5:00 pm

1 stop12h 45m

$521

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

lun. 11/24

2:35 pm-10:50 am

1 stop12h 15m

London Heathrow

mar. 12/2

8:35 pm-5:00 pm

1 stop28h 25m

$522

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

dom. 3/22

3:35 pm-7:30 pm

1 stop20h 55m

London Heathrow

dom. 3/29

9:25 pm-8:45 pm

1 stop31h 20m

$523

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

mar. 11/11

7:20 pm-12:50 pm

Nonstop9h 30m

London Heathrow

mar. 11/25

6:20 am-11:25 am

1 stop13h 05m

$550

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

mar. 11/11

7:20 pm-12:50 pm

Nonstop9h 30m

London Heathrow

mar. 11/25

2:45 pm-4:50 pm

Nonstop10h 05m

$557

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

mié. 11/12

4:48 pm-10:30 am

Nonstop9h 42m

London Heathrow

mié. 11/19

6:20 am-1:20 pm

1 stop15h 00m

$577

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

mar. 11/4

7:20 pm-12:50 pm

Nonstop9h 30m

London Heathrow

jue. 11/20

6:20 am-11:25 am

1 stop13h 05m

$578

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

mar. 11/11

7:20 pm-12:50 pm

Nonstop9h 30m

London Heathrow

lun. 11/24

11:45 am-11:45 am

1 stop32h 00m

$579

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

mié. 2/18

6:50 pm-12:20 pm

Nonstop9h 30m

London Heathrow

vie. 2/27

2:55 pm-4:55 pm

Nonstop10h 00m

$588

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Seattle to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Delays

Layovers

Other information

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

The month of March is, on average, the cheapest month to fly to London Heathrow Airport from Seattle, with most prices found around $681. If you’re not able to fly to London Heathrow Airport in March, then September is your next best option. Flight prices from Seattle to London Heathrow Airport during September average around $695.

What is the cheapest day to depart on your flight to London Heathrow Airport?

Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $816. The most expensive day to fly to London Heathrow Airport is Friday, with ticket prices averaging around $909.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the evening. momondo users have found flights departing from Seattle to London Heathrow Airport in the evening for as low as $838. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive with an average ticket price of $987.

What is the cheapest Seattle/Tacoma Intl to London Heathrow flight route?

Fly from Seattle/Tacoma Intl to London Heathrow for the best Seattle/Tacoma Intl - London Heathrow flight prices

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

You are more likely to see cheaper flights to London Heathrow Airport from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $802 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Seattle for as low as $705 on momondo.

What cabin class options are available on Seattle/Tacoma Intl to London Heathrow flights?

There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Seattle to London Heathrow Airport flight prices changed over time?

As of October 2025, prices for Seattle to London Heathrow Airport flights are approximately 42% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Seattle to London Heathrow Airport (SEA to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to London Heathrow Airport

Best Price Found	$424
Fastest flight time	9h 15m
Direct flights	Every day

The best one-way flight to London Heathrow Airport from Seattle in the past 72 hours is $424. The best round-trip flight deal from Seattle to London Heathrow Airport found on momondo in the last 72 hours is $682.

The fastest flight from Seattle to London Heathrow Airport takes 9h 15m

Direct flights go from Seattle to London Heathrow Airport every day.

Search flight deals

How far is Seattle/Tacoma Intl to London Heathrow by plane?
The straight-line distance from Seattle/Tacoma Intl to London Heathrow is 4774.1 mi. 9h 30m is a normal flight duration for this route.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to London Heathrow Airport?
Prices for flights from Seattle/Tacoma Intl Airport to London Heathrow Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to London Heathrow Airport?
The number of operators available for flights from Seattle/Tacoma Intl Airport to London Heathrow Airport is 14 as of October 2025.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to London Heathrow Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The travel and health documents you'll need for your trip to London Heathrow Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Heathrow Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Seattle to London Heathrow Airport?
Based on momondo bookings for flights between Seattle and London Heathrow Airport, the leading plane model is Boeing 787-10 Dreamliner, making up 29.44% of the total bookings. Other popular models include Airbus A330-200 with 16.85%, Airbus A330-900neo with 15.60%, and Boeing 787-9 Dreamliner with 14.35%.
What is the most popular airline from Seattle to London Heathrow Airport?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Seattle to London Heathrow Airport is British Airways (29% of total bookings). The next most popular airlines are Delta (22%), Virgin Atlantic (14%), and Iberia (9%).

Best airlines flying from Seattle to London Heathrow Airport

Compare and see reviews for airlines that fly from Seattle to London Heathrow Airport with momondo

Airline	Rating	Free Cancellation	Price
Scandinavian Airlines	PriceFrom $465	Free Cancellation	Rating 7.4 1,535 reviews	Search Scandinavian Airlines flights
Icelandair	PriceFrom $484	Free Cancellation	Rating 7.1 561 reviews	Search Icelandair flights
Aer Lingus	PriceFrom $500	Free Cancellation	Rating 7.2 1,352 reviews	Search Aer Lingus flights
Air France	PriceFrom $517	Free Cancellation	Rating 7.4 1,477 reviews	Search Air France flights
American Airlines	PriceFrom $518	Free Cancellation	Rating 7.2 11,031 reviews	Search American Airlines flights
United Airlines	PriceFrom $547	Free Cancellation	Rating 7.4 8,992 reviews	Search United Airlines flights
British Airways	PriceFrom $547	Free Cancellation	Rating 6.7 7,468 reviews	Search British Airways flights
Alaska Airlines	PriceFrom $553	Free Cancellation	Rating 8.0 11,156 reviews	Search Alaska Airlines flights
Finnair	PriceFrom $556	Free Cancellation	Rating 7.6 1,333 reviews	Search Finnair flights
Delta	PriceFrom $561	Free Cancellation	Rating 7.9 7,981 reviews	Search Delta flights

Alaska Airlines Flights From Seattle to London Heathrow Airport
Alaska Airlines is one of the most popular airlines flying from Seattle to London Heathrow Airport, operating 5 flights/week on average for this route. A good Alaska Airlines flight deal for Seattle to London Heathrow Airport starts from $553 round-trip, up to an average price of $999. Our users have rated Alaska Airlines at 8.0/10.
Delta Flights From Seattle to London Heathrow Airport
Another popular option for Seattle to London Heathrow Airport flights is Delta (7.9/10, 7,981 ratings). Delta flies from Seattle to London Heathrow Airport around 6 times per week, with deals starting from $561 round-trip and rising to an average price of around $837.

Gatwick

Hounslow

Milton Keynes

Luton

Dover

Slough

Guildford

Hayes

Dartford

Crawley

Stratford-upon-Avon

Brentwood

Salisbury

Chelmsford

Colchester

Folkestone

Romford

Swindon

Cobham

Wembley

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to London?

Finding the right flight to London from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.

Can I find flights from Seattle to London with flexible booking policies on momondo?

Flights from Seattle to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Seattle to London?

Once you have performed a search for Seattle to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Seattle to London right now. Can momondo alert me if prices change?

Price alerts on flights to London from Seattle are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your London Heathrow Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

sáb. 11/22

sáb. 11/29

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to London

Popular cities in the United Kingdom

Flights to London Gatwick Airportfrom $329

Flights to London City Airportfrom $449

Flights to London Stansted Airportfrom $397

Flights to London Luton Airportfrom $386

Flights to Glasgow Intl Airportfrom $403

Flights to London Southend Airportfrom $406

Flights to Belfast Intl Airportfrom $520

Flights to Belfast City Airportfrom $520

Cheap flights from Seattle to London from $332

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to London departing on 11/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Seattle to London

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Lufthansa flights from Seattle to London Heathrow Airport

Our best Lufthansa deals on Seattle to London Heathrow Airport flight tickets

British Airways flights from Seattle to London Heathrow Airport

Our best British Airways deals on Seattle to London Heathrow Airport flight tickets

momondo Fare Finder

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

See travel insights to London from

How to get the cheapest flight ticket from Seattle to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

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

What is the cheapest day to depart on your flight to London Heathrow Airport?

Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $816. The most expensive day to fly to London Heathrow Airport is Friday, with ticket prices averaging around $909.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

What is the cheapest Seattle/Tacoma Intl to London Heathrow flight route?

Fly from Seattle/Tacoma Intl to London Heathrow for the best Seattle/Tacoma Intl - London Heathrow flight prices

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

What cabin class options are available on Seattle/Tacoma Intl to London Heathrow flights?

There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Seattle to London Heathrow Airport flight prices changed over time?

As of October 2025, prices for Seattle to London Heathrow Airport flights are approximately 42% cheaper when compared to flights at the same time last year.

What is the cheapest airline that flies from Seattle/Tacoma Intl to London Heathrow?

Icelandair, WestJet, and Scandinavian Airlines are the most popular carriers operating from Seattle/Tacoma Intl to London Heathrow

What airlines fly to London Heathrow Airport?

How often are flights from Seattle to London delayed?

Historically, on average around 17% of flights between Seattle and London have experienced a delay on any given week. The average delay length over the past 12 months has been 130 minutes.

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

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

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

Friday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

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

According to our data, Aeromexico have had the least number of delays on this route over the last 12 months; with about 9% of their flights experiencing any sort of delay.

Which airport is the most popular layover for flights between Seattle and London Heathrow Airport?

Reykjavik (KEF) was the most common stop: 79% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Seattle to London Heathrow Airport?

Flights via Reykjavik (KEF) offer the lowest average round-trip price of $917.

Which layover airport has the shortest travel time from Seattle to London Heathrow Airport?

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 12h 16m.

Which layover airport has the shortest connection time from Seattle to London Heathrow Airport?

Dublin (DUB) has the shortest average layover time for this route: 1h 54m.

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

As of October 2025, 8 flights take off from Seattle and land in London Heathrow Airport each day. The most common flight departure time for this route is 8:00PM, with 50% of daily flights taking off in the evening.

How many flights depart from Seattle to London Heathrow Airport on average per week?

57 flights are operational weekly from Seattle to London Heathrow Airport as of October 2025. The most popular departure day for this route is Wed, with 37% of flights per week taking off on this day.

When to book flights from Seattle to London Heathrow Airport

Cheap Seattle to London Heathrow Airport (SEA to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to London Heathrow Airport

Best Price Found

Fastest flight time

Direct flights

How far is Seattle/Tacoma Intl to London Heathrow by plane?

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to London Heathrow Airport?

How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to London Heathrow Airport?

How old do you have to be to fly from Seattle/Tacoma Intl Airport to London Heathrow Airport?

What documentation or ID do you need to fly to London Heathrow Airport?

What is the most popular plane model from Seattle to London Heathrow Airport?

What is the most popular airline from Seattle to London Heathrow Airport?

Best airlines flying from Seattle to London Heathrow Airport

Compare and see reviews for airlines that fly from Seattle to London Heathrow Airport with momondo

Alaska Airlines Flights From Seattle to London Heathrow Airport

Delta Flights From Seattle to London Heathrow Airport

Traveling to a place near London?

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to London?

Can I find flights from Seattle to London with flexible booking policies on momondo?

How can momondo help me find flights from Seattle to London?