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

Lufthansa and United Airlines are the most popular carriers operating from London Heathrow to Washington

What airlines fly to State of Washington?

British Airways, Delta and Virgin Atlantic are the top three most popular airlines that fly to State of Washington from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 43% of people opting to fly with this airline when traveling to State of Washington. Keep in mind that there are 4 different airlines that fly to State of Washington on a routine basis, so you have a few additional options to choose from.

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

As of December 2025, there are 5 operators available to choose from for flights from London Heathrow Airport to Washington.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Washington.

What documentation or ID do you need to fly to Washington?

The required travel and health documents for your Washington trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$471 Cheap Flights from London Heathrow Airport to State of Washington in 2025/26

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

The number of flights available between London Heathrow Airport and State of Washington is 100 per week as of December 2025. The most frequent departure day is Wed, with 18% of weekly flights leaving on this day.

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

As of December 2025, 14 flights take off from London Heathrow Airport and land in State of Washington each day. The most common flight departure time for this route is 2:00PM, with 80% of daily flights taking off in the afternoon.

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

5:25 pm - 7:45 pm

LHR

SEA

10h 20mnonstop

11:25 am - 9:50 am

SEA

LHR

14h 25m1 stop

$609Delta

Thu, Apr 2 - Wed, Apr 8

12:25 pm - 8:50 pm

LHR

SEA

16h 25m1 stop

7:20 am - 6:45 am

SEA

LHR

15h 25m1 stop

$613Delta

Mon, Mar 30 - Sun, Apr 12

9:25 pm - 5:55 pm

LHR

SEA

28h 30m1 stop

3:40 pm - 11:55 am

SEA

LHR

12h 15m1 stop

$622Icelandair

Sat, Apr 25 - Sat, May 2

9:25 pm - 5:55 pm

LHR

SEA

28h 30m1 stop

3:40 pm - 8:20 pm

SEA

LHR

20h 40m1 stop

$623Icelandair

Sat, Apr 25 - Sat, May 2

12:15 pm - 12:23 am

LHR

GEG

20h 08m2 stops

7:30 am - 10:50 am

GEG

LHR

19h 20m2 stops

$652Multiple Airlines

Fri, Jan 23 - Fri, Jan 30

12:00 pm - 9:15 am

LHR

PDX

53h 15m2 stops

7:30 am - 7:10 am

PDX

LHR

39h 40m2 stops

$707Air Canada

Wed, Feb 11 - Sat, Feb 14

11:10 am - 9:15 am

LHR

PDX

30h 05m2 stops

7:30 am - 7:10 am

PDX

LHR

39h 40m2 stops

$754Air Canada

Thu, Feb 12 - Sat, Feb 14

8:05 pm - 10:32 pm

LHR

PDX

34h 27m2 stops

7:00 am - 5:55 am

PDX

LHR

14h 55m1 stop

$779Multiple Airlines

Sun, Jan 25 - Mon, Feb 9

11:05 am - 7:56 pm

LHR

PSC

16h 51m1 stop

11:35 am - 8:10 pm

PSC

LHR

24h 35m2 stops

$1,239Virgin Atlantic

Mon, Jan 5 - Sat, Jan 10

5:20 pm - 10:48 pm

LHR

PSC

37h 28m2 stops

11:35 am - 8:10 pm

PSC

LHR

24h 35m2 stops

$1,256Virgin Atlantic

Mon, Jan 5 - Sat, Jan 10

Scandinavian Airlines flights from London Heathrow Airport to State of Washington

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

Scandinavian Airlines

May 30

LHR3:35 pmLondon Heathrow

30h 10m

2 stops

SEA1:45 pmSeattle/Tacoma Intl

Jun 13

SEA3:55 pmSeattle/Tacoma Intl

17h 45m

1 stop

LHR5:40 pmLondon Heathrow

$644

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Scandinavian Airlines

May 27

LHR7:50 pmLondon Heathrow

49h 55m

2 stops

SEA1:45 pmSeattle/Tacoma Intl

Jun 2

SEA3:55 pmSeattle/Tacoma Intl

16h 30m

2 stops

LHR4:25 pmLondon Heathrow

$647

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Scandinavian Airlines

May 30

LHR3:35 pmLondon Heathrow

30h 10m

2 stops

SEA1:45 pmSeattle/Tacoma Intl

Jun 13

SEA3:55 pmSeattle/Tacoma Intl

18h 55m

2 stops

LHR6:50 pmLondon Heathrow

$648

Find similar

WestJet flights from London Heathrow Airport to State of Washington

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

WestJet

Jan 16

LHR2:50 pmLondon Heathrow

27h 32m

2 stops

SEA10:22 amSeattle/Tacoma Intl

Jan 26

SEA3:10 pmSeattle/Tacoma Intl

13h 40m

1 stop

LHR12:50 pmLondon Heathrow

$656

Find similar

WestJet

Jan 16

LHR2:50 pmLondon Heathrow

31h 48m

1 stop

SEA2:38 pmSeattle/Tacoma Intl

Jan 26

SEA3:10 pmSeattle/Tacoma Intl

13h 40m

1 stop

LHR12:50 pmLondon Heathrow

$671

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momondo Fare Finder

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

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Route

Depart

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Price

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 4/2

5:25 pm-7:45 pm

Nonstop10h 20m

Seattle/Tacoma Intl

Wed 4/8

11:25 am-9:50 am

1 stop14h 25m

$609

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 3/30

12:25 pm-8:50 pm

1 stop16h 25m

Seattle/Tacoma Intl

Sun 4/12

7:20 am-6:45 am

1 stop15h 25m

$613

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 4/25

9:25 pm-5:55 pm

1 stop28h 30m

Seattle/Tacoma Intl

Sat 5/2

3:40 pm-11:55 am

1 stop12h 15m

$622

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 4/25

9:25 pm-5:55 pm

1 stop28h 30m

Seattle/Tacoma Intl

Sat 5/2

3:40 pm-8:20 pm

1 stop20h 40m

$623

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Fri 1/23

12:15 pm-12:23 am

2 stops20h 08m

Spokane

Fri 1/30

7:30 am-10:50 am

2 stops19h 20m

$652

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Wed 2/11

12:00 pm-9:15 am

2 stops53h 15m

Portland

Sat 2/14

7:30 am-7:10 am

2 stops39h 40m

$707

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Thu 2/12

11:10 am-9:15 am

2 stops30h 05m

Portland

Sat 2/14

7:30 am-7:10 am

2 stops39h 40m

$754

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Sun 1/25

8:05 pm-10:32 pm

2 stops34h 27m

Portland

Mon 2/9

7:00 am-5:55 am

1 stop14h 55m

$779

LondonPasco

LHR - PSC

LHRPSC

London Heathrow

Mon 1/5

11:05 am-7:56 pm

1 stop16h 51m

Pasco Tri Cities

Sat 1/10

11:35 am-8:10 pm

2 stops24h 35m

$1,239

LondonPasco

LHR - PSC

LHRPSC

London Heathrow

Mon 1/5

5:20 pm-10:48 pm

2 stops37h 28m

Pasco Tri Cities

Sat 1/10

11:35 am-8:10 pm

2 stops24h 35m

$1,256

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

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 State of Washington?

The month of February is, on average, the cheapest month to fly to State of Washington from London Heathrow Airport, with most prices found around $615. If you aren’t able to travel to State of Washington during the month of February, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $688.

What is the cheapest day to depart on your flight to State of Washington?

The cheapest day to depart from London Heathrow Airport to State of Washington is on a Wednesday. Travelers who choose to depart for State of Washington on a Wednesday will often find tickets for as low as $777. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from London Heathrow Airport to State of Washington for around $942.

What is the cheapest time of day to depart on your flight to State of Washington?

The cheapest time of day to fly to State of Washington is in the afternoon when flights can be purchased for as low as $819. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $943 on average. Flights to State of Washington from London Heathrow Airport in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest London Heathrow to Washington flight route?

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

How far in advance should I book a flight to State of Washington?

You are more likely to see cheaper flights to State of Washington from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to State of Washington for around $762 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to State of Washington from London Heathrow Airport for as low as $699 on momondo.

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

There are 4 cabin classes available to choose from on London Heathrow to Washington 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 London Heathrow Airport to State of Washington flights?

You could potentially save up to 7% on your flight if you consider stops on a London Heathrow Airport to State of Washington flight.

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

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

Best Price Found	$713
Fastest flight time	9h 45m
Direct flights	Every day
Airports in State of Washington	96 airports

The best one-way flight to State of Washington from London Heathrow Airport in the past 72 hours is $713. The best round-trip flight deal from London Heathrow Airport to State of Washington found on momondo in the last 72 hours is $793.

The fastest flight from London Heathrow Airport to State of Washington takes 9h 45m

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

There are 96 airports in State of Washington. From London Heathrow Airport there are direct flights to Portland (PDX), Seattle/Tacoma Intl (SEA).

Search flight deals

When did momondo last update prices for flights from London Heathrow Airport to Washington?
Prices for flights from London Heathrow Airport to Washington refresh daily.
How many operators does momondo search for flights from London Heathrow Airport to Washington?
As of December 2025, there are 5 operators available to choose from for flights from London Heathrow Airport to Washington.
How old do you have to be to fly from London Heathrow Airport to Washington?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Washington.
What documentation or ID do you need to fly to Washington?
The required travel and health documents for your Washington trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from London Heathrow Airport to State of Washington?
momondo data reveals that the most frequently booked plane model on the route from London Heathrow Airport to State of Washington is Boeing 787-9 Dreamliner, representing 32.57% of all bookings. The subsequent popular models are Boeing 787-10 Dreamliner at 18.69%, Airbus A330-200 at 15.29%, and Airbus A330-900neo at 10.85%.

Best airlines flying from London Heathrow Airport to State of Washington

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

Airline	Rating	Free Cancellation	Price
British Airways	PriceFrom $553	Free Cancellation	Rating 6.7 7,571 reviews	Search British Airways flights
Virgin Atlantic	PriceFrom $574	Free Cancellation	Rating 7.5 675 reviews	Search Virgin Atlantic flights
Delta	PriceFrom $575	Free Cancellation	Rating 7.9 8,007 reviews	Search Delta flights
American Airlines	PriceFrom $589	Free Cancellation	Rating 7.2 11,050 reviews	Search American Airlines flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Washington for you.

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

Flights from London to Washington 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 London to Washington?

momondo provides multiple filters to help you find the best flight to Washington from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are not ready to book a flight from London to Washington now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington and let you know when they change.

An easier way to manage your State of Washington trip

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London Heathrow Airport flight routes

Flights from London Heathrow to New York John F Kennedy Intl

Flights from London Heathrow to Minneapolis St Paul

Flights from London Heathrow to Boston Logan Intl

Flights from London Heathrow to Los Angeles

Flights from London Heathrow to Detroit Metropolitan Wayne County

Flights from London Heathrow to Washington, D.C. Dulles Intl

Cheap flights from London Heathrow Airport to Washington from $471

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Scandinavian Airlines flights from London Heathrow Airport to State of Washington

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WestJet flights from London Heathrow Airport to State of Washington

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

momondo Fare Finder

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

See travel insights to Washington from

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

What is the cheapest month to fly to State of Washington?

What is the cheapest day to depart on your flight to State of Washington?

What is the cheapest time of day to depart on your flight to State of Washington?

What is the cheapest London Heathrow to Washington flight route?

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

How far in advance should I book a flight to State of Washington?

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

There are 4 cabin classes available to choose from on London Heathrow to Washington 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 London Heathrow Airport to State of Washington flights?

You could potentially save up to 7% on your flight if you consider stops on a London Heathrow Airport to State of Washington flight.

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

Lufthansa and United Airlines are the most popular carriers operating from London Heathrow to Washington

What airlines fly to State of Washington?

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

As of December 2025, 14 flights take off from London Heathrow Airport and land in State of Washington each day. The most common flight departure time for this route is 2:00PM, with 80% of daily flights taking off in the afternoon.

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

The number of flights available between London Heathrow Airport and State of Washington is 100 per week as of December 2025. The most frequent departure day is Wed, with 18% of weekly flights leaving on this day.

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

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

Best Price Found

Fastest flight time

Direct flights

Airports in State of Washington

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

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

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

What documentation or ID do you need to fly to Washington?

What is the most popular plane model from London Heathrow Airport to State of Washington?

Best airlines flying from London Heathrow Airport to State of Washington

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

Why use momondo?

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

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

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

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

An easier way to manage your State of Washington 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.

Get notified when prices go down

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

Find better results for your trip to Washington

Popular cities in Washington

Popular flights according to clicks in the last 7 days on momondo