What airlines fly to London Heathrow Airport?

Delta, British Airways and Virgin Atlantic are the top three most popular airlines that fly to London Heathrow Airport from State of Washington according to our data. Delta is the first choice among our users, with 35% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 13 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Washington to London Heathrow?

Virgin Atlantic, Icelandair, and Delta are the most popular carriers operating from Washington to London Heathrow

How long does it take to fly to London Heathrow Airport?

On average, it takes 9h 15m to fly from State of Washington to London Heathrow Airport if you fly out of Seattle (the most popular airport in State of Washington) and into London Heathrow Airport (the most popular airport in London Heathrow Airport). If you’re flying out of Spokane and into London Heathrow Airport, then the flight time is around 12h 17m.

When did momondo last update prices for flights from Washington to London Heathrow Airport?

Prices for flights from Washington to London Heathrow Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Washington to London Heathrow Airport?

As of June 2026, there are 15 operators available to choose from for flights from Washington to London Heathrow Airport.

How old do you have to be to fly from Washington to London Heathrow Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington 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.

$110 Cheap Flights from State of Washington to London Heathrow Airport in 2026

Q: How many flights depart from State of Washington to London Heathrow Airport on average per week?

The number of flights available between State of Washington and London Heathrow Airport is 193 per week as of June 2026. The most frequent departure day is Tue, with 16% of weekly flights leaving on this day.

Q: How many flights depart from State of Washington to London Heathrow Airport on average per day?

The number of flights available between State of Washington and London Heathrow Airport is 27 per day as of June 2026. The most frequent departure time is 1:00PM, with 70% of daily flights leaving in the evening.

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Find the cheapest flights from Washington to London

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:25 pm - 12:10 pm

PSC

LHR

36h 45m

1 stop

10:55 am - 4:43 pm

LHR

PSC

13h 48m

1 stop

$547Virgin Atlantic

พฤ., ก.ย. 17 - ส., ต.ค. 3

12:28 pm - 3:35 pm

PSC

LHR

43h 07m

2 stops

9:40 am - 10:04 pm

LHR

PSC

20h 24m

2 stops

$549Virgin Atlantic

ศ., ก.ย. 18 - ส., ต.ค. 3

7:00 pm - 11:55 am

SEA

LHR

32h 55m

1 stop

8:35 pm - 6:00 pm

LHR

SEA

28h 25m

1 stop

$710Icelandair

อ., ต.ค. 20 - อ., ต.ค. 27

2:35 pm - 10:50 am

SEA

LHR

12h 15m

1 stop

9:25 pm - 5:55 pm

LHR

SEA

28h 30m

1 stop

$712Icelandair

พ., พ.ย. 18 - อา., เม.ย. 18

7:00 pm - 9:40 pm

SEA

LHR

18h 40m

2 stops

10:20 am - 8:40 pm

LHR

SEA

18h 20m

2 stops

$720Multiple Airlines

พฤ., ส.ค. 20 - พ., ส.ค. 26

5:29 pm - 3:05 pm

PSC

LHR

13h 36m

1 stop

5:00 pm - 11:52 pm

LHR

PSC

14h 52m

1 stop

$810Alaska Airlines

ศ., ก.ย. 18 - ส., ต.ค. 3

5:00 am - 9:40 am

GEG

LHR

20h 40m

1 stop

6:35 am - 9:05 pm

LHR

GEG

21h 30m

2 stops

$873United Airlines

พ., ต.ค. 14 - พ., ต.ค. 28

10:52 am - 3:05 pm

PSC

LHR

20h 13m

1 stop

5:00 pm - 11:52 pm

LHR

PSC

14h 52m

1 stop

$874Alaska Airlines

จ., ต.ค. 5 - อ., ต.ค. 13

5:00 am - 9:40 am

GEG

LHR

20h 40m

1 stop

7:25 am - 10:16 pm

LHR

GEG

22h 51m

2 stops

$874United Airlines

พ., ก.ย. 23 - พ., ต.ค. 14

1:38 pm - 9:35 am

GEG

LHR

59h 57m

2 stops

7:25 am - 8:49 pm

LHR

GEG

21h 24m

2 stops

$886Multiple Airlines

ศ., ต.ค. 2 - ศ., ต.ค. 23

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Virgin Atlantic flights from State of Washington to London Heathrow Airport

Our best Virgin Atlantic deals on State of Washington to London Heathrow Airport flight tickets

Virgin Atlantic

Sep 17

PSC3:25 pmPasco Tri Cities

36h 45m

1 stop

LHR12:10 pmLondon Heathrow

Oct 3

LHR10:55 amLondon Heathrow

13h 48m

1 stop

PSC4:43 pmPasco Tri Cities

$547

Virgin Atlantic

Sep 18

PSC12:28 pmPasco Tri Cities

43h 07m

2 stops

LHR3:35 pmLondon Heathrow

Oct 3

LHR9:40 amLondon Heathrow

20h 24m

2 stops

PSC10:04 pmPasco Tri Cities

$549

Virgin Atlantic

Sep 17

PSC3:25 pmPasco Tri Cities

42h 25m

2 stops

LHR5:50 pmLondon Heathrow

Oct 3

LHR9:40 amLondon Heathrow

17h 46m

2 stops

PSC7:26 pmPasco Tri Cities

$750

KLM flights from State of Washington to London Heathrow Airport

Our best KLM deals on State of Washington to London Heathrow Airport flight tickets

KLM

Sep 30

PSC3:24 pmPasco Tri Cities

14h 26m

2 stops

LHR1:50 pmLondon Heathrow

Oct 14

LHR6:30 amLondon Heathrow

17h 48m

2 stops

PSC4:18 pmPasco Tri Cities

$910

KLM

Aug 8

PDX1:15 pmPortland

12h 45m

1 stop

LHR10:00 amLondon Heathrow

Aug 17

LHR11:40 amLondon Heathrow

13h 34m

1 stop

PDX5:14 pmPortland

$922

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PascoLondon

PSC - LHR

PSCLHR

Pasco Tri Cities

พฤ. 9/17

3:25 pm-12:10 pm

1 stop36h 45m

London Heathrow

ส. 10/3

10:55 am-4:43 pm

1 stop13h 48m

$547

PascoLondon

PSC - LHR

PSCLHR

Pasco Tri Cities

ศ. 9/18

12:28 pm-3:35 pm

2 stops43h 07m

London Heathrow

ส. 10/3

9:40 am-10:04 pm

2 stops20h 24m

$549

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

อ. 10/20

7:00 pm-11:55 am

1 stop32h 55m

London Heathrow

อ. 10/27

8:35 pm-6:00 pm

1 stop28h 25m

$710

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

พ. 11/18

2:35 pm-10:50 am

1 stop12h 15m

London Heathrow

อา. 4/18

9:25 pm-5:55 pm

1 stop28h 30m

$712

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

พฤ. 8/20

7:00 pm-9:40 pm

2 stops18h 40m

London Heathrow

พ. 8/26

10:20 am-8:40 pm

2 stops18h 20m

$720

Quickest round-trip

PascoLondon

PSC - LHR

PSCLHR

Pasco Tri Cities

ศ. 9/18

5:29 pm-3:05 pm

1 stop13h 36m

London Heathrow

ส. 10/3

5:00 pm-11:52 pm

1 stop14h 52m

$810

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

พ. 10/14

5:00 am-9:40 am

1 stop20h 40m

London Heathrow

พ. 10/28

6:35 am-9:05 pm

2 stops21h 30m

$873

PascoLondon

PSC - LHR

PSCLHR

Pasco Tri Cities

จ. 10/5

10:52 am-3:05 pm

1 stop20h 13m

London Heathrow

อ. 10/13

5:00 pm-11:52 pm

1 stop14h 52m

$874

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

พ. 9/23

5:00 am-9:40 am

1 stop20h 40m

London Heathrow

พ. 10/14

7:25 am-10:16 pm

2 stops22h 51m

$874

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

ศ. 10/2

1:38 pm-9:35 am

2 stops59h 57m

London Heathrow

ศ. 10/23

7:25 am-8:49 pm

2 stops21h 24m

$886

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 State of Washington 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

Other information

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

The month of January is, on average, the cheapest month to fly to London Heathrow Airport from State of Washington, with most prices found around $320. If you’re not able to fly to London Heathrow Airport in January, then August is your next best option. Flight prices from State of Washington to London Heathrow Airport during August average around $416.

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 $829. The most expensive day to fly to London Heathrow Airport is Friday, with ticket prices averaging around $933.

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 at noon. momondo users have found flights departing from State of Washington to London Heathrow Airport at noon for as low as $859. 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 evening are often more expensive with an average ticket price of $887.

What is the cheapest Washington to London Heathrow flight route?

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

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

You are more likely to see cheaper flights to London Heathrow Airport from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $830 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 State of Washington for as low as $722 on momondo.

What cabin class options are available on State of Washington to London Heathrow Airport flights?

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

Can stopping save me money on State of Washington to London Heathrow Airport flights?

No. A direct flight is the cheapest option for a flight between State of Washington to London Heathrow Airport.

Cheap State of Washington to London Heathrow Airport flight deals and tips

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

Best Price Found	$408
Fastest flight time	9h 15m
Direct flights	Every day

The best one-way flight to London Heathrow Airport from State of Washington in the past 72 hours is $408. The best round-trip flight deal from State of Washington to London Heathrow Airport found on momondo in the last 72 hours is $974.

The fastest flight from State of Washington to London Heathrow Airport takes 9h 15m

Direct flights go from State of Washington to London Heathrow Airport every day.

Search flight deals

Frequently asked questions about flying from Washington to London Heathrow Airport

When did momondo last update prices for flights from Washington to London Heathrow Airport?
Prices for flights from Washington to London Heathrow Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Washington to London Heathrow Airport?
As of June 2026, there are 15 operators available to choose from for flights from Washington to London Heathrow Airport.
How old do you have to be to fly from Washington to London Heathrow Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington 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 State of Washington to London Heathrow Airport?
Based on momondo bookings for flights between State of Washington and London Heathrow Airport, the leading plane model is Boeing 787-10 Dreamliner, making up 27.54% of the total bookings. Other popular models include Airbus A330-900neo with 24.22%, Boeing 777-300ER with 20.44%, and Boeing 787-9 Dreamliner with 9.27%.

Best airlines flying from State of Washington to London Heathrow Airport

Compare and see reviews for airlines that fly from State of Washington to London Heathrow Airport with momondo

Airline	Rating	Free Cancellation	Price
Aer Lingus	PriceFrom $480	Free Cancellation	Rating 7.3 1,629 reviews	Search Aer Lingus flights
Icelandair	PriceFrom $484	Free Cancellation	Rating 7.0 692 reviews	Search Icelandair flights
American Airlines	PriceFrom $515	Free Cancellation	Rating 7.1 11,773 reviews	Search American Airlines flights
Air France	PriceFrom $517	Free Cancellation	Rating 7.5 1,614 reviews	Search Air France flights
British Airways	PriceFrom $517	Free Cancellation	Rating 6.7 8,080 reviews	Search British Airways flights
Delta	PriceFrom $540	Free Cancellation	Rating 7.8 8,453 reviews	Search Delta flights
United Airlines	PriceFrom $547	Free Cancellation	Rating 7.4 9,896 reviews	Search United Airlines flights
Finnair	PriceFrom $560	Free Cancellation	Rating 7.6 1,415 reviews	Search Finnair flights
Virgin Atlantic	PriceFrom $565	Free Cancellation	Rating 7.5 690 reviews	Search Virgin Atlantic flights
Alaska Airlines	PriceFrom $630	Free Cancellation	Rating 7.9 12,592 reviews	Search Alaska Airlines flights

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

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

Flights from Washington 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 Washington to London?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to London from Washington.

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

Yes momondo offers price alerts on flights to London from Washington. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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Cheap flights from Washington to London from $110

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to London departing on 10/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Virgin Atlantic flights from State of Washington to London Heathrow Airport

Our best Virgin Atlantic deals on State of Washington to London Heathrow Airport flight tickets

KLM flights from State of Washington to London Heathrow Airport

Our best KLM deals on State of Washington to London Heathrow Airport flight tickets

momondo Fare Finder

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

See travel insights to London from

How to get the cheapest flight ticket from State of Washington to London Heathrow Airport

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?

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

What is the cheapest Washington to London Heathrow flight route?

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

What cabin class options are available on State of Washington to London Heathrow Airport flights?

Can stopping save me money on State of Washington to London Heathrow Airport flights?

What is the cheapest airline that flies from Washington to London Heathrow?

What airlines fly to London Heathrow Airport?

How many flights depart from State of Washington to London Heathrow Airport on average per day?

How many flights depart from State of Washington to London Heathrow Airport on average per week?

How long does it take to fly to London Heathrow Airport?

Cheap State of Washington to London Heathrow Airport flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Washington to London Heathrow Airport

Best airlines flying from State of Washington to London Heathrow Airport

Compare and see reviews for airlines that fly from State of Washington to London Heathrow Airport with momondo

Traveling to a place near London?

Why use momondo?

An easier way to manage your London Heathrow Airport trip

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