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

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

Which airlines fly to State of Washington?

Virgin Atlantic, British Airways and KLM are the top three most popular airlines that fly to State of Washington from London Heathrow Airport according to our data. Virgin Atlantic is the first choice among our users, with 53% of people opting to fly with this airline when travelling to State of Washington. Keep in mind that there are 14 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?

The number of operators available for flights from London Heathrow Airport to Washington is 14 as of December 2025.

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 necessary travel and health documents for your Washington trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

£352 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?

As of December 2025, 118 flights take off from London Heathrow Airport and land in State of Washington each week. The most common flight departure day for this route is Fri, with 20% of weekly flights taking off on this day.

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Find the cheapest flights from London Heathrow Airport to Washington

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One-way

Last minute

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Cheap return flights

Enter your travel dates to find the best prices.

17:25 - 19:45

LHR

SEA

10h 20mdirect

15:35 - 13:10

SEA

LHR

13h 35m1 stop

£455Delta

Thu, 2 Apr - Thu, 9 Apr

12:25 - 20:50

LHR

SEA

16h 25m1 stop

07:20 - 06:45

SEA

LHR

15h 25m1 stop

£458Delta

Mon, 30 Mar - Sun, 12 Apr

21:25 - 17:55

LHR

SEA

28h 30m1 stop

15:40 - 11:55

SEA

LHR

12h 15m1 stop

£465Icelandair

Sat, 25 Apr - Sat, 2 May

21:25 - 17:55

LHR

SEA

28h 30m1 stop

15:40 - 20:20

SEA

LHR

20h 40m1 stop

£465Icelandair

Sat, 25 Apr - Sat, 2 May

06:35 - 21:18

LHR

GEG

21h 43m2 stops

05:00 - 07:55

GEG

LHR

19h 55m2 stops

£555United Airlines

Tue, 10 Mar - Tue, 17 Mar

06:35 - 21:03

LHR

GEG

21h 28m2 stops

07:02 - 09:40

GEG

LHR

19h 38m2 stops

£556United Airlines

Tue, 10 Mar - Tue, 17 Mar

06:30 - 19:14

LHR

PDX

19h 44m2 stops

15:15 - 11:50

PDX

LHR

13h 35m1 stop

£586Lufthansa

Wed, 11 Mar - Thu, 19 Mar

06:30 - 19:16

LHR

GEG

20h 46m2 stops

06:53 - 07:25

GEG

LHR

16h 32m1 stop

£607Lufthansa

Fri, 23 Jan - Fri, 30 Jan

11:05 - 19:56

LHR

PSC

16h 51m1 stop

11:35 - 20:10

PSC

LHR

24h 35m2 stops

£925Virgin Atlantic

Mon, 5 Jan - Sat, 10 Jan

17:20 - 22:48

LHR

PSC

37h 28m2 stops

11:35 - 20:10

PSC

LHR

24h 35m2 stops

£938Virgin Atlantic

Mon, 5 Jan - Sat, 10 Jan

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

30 May

LHR15:35London Heathrow

30h 10m

2 stops

SEA13:45Seattle/Tacoma Intl

13 Jun

SEA15:55Seattle/Tacoma Intl

17h 45m

1 stop

LHR17:40London Heathrow

£481

Find similar

Scandinavian Airlines

27 May

LHR19:50London Heathrow

49h 55m

2 stops

SEA13:45Seattle/Tacoma Intl

2 Jun

SEA15:55Seattle/Tacoma Intl

16h 30m

2 stops

LHR16:25London Heathrow

£483

Find similar

Scandinavian Airlines

30 May

LHR15:35London Heathrow

30h 10m

2 stops

SEA13:45Seattle/Tacoma Intl

13 Jun

SEA15:55Seattle/Tacoma Intl

18h 55m

2 stops

LHR18:50London Heathrow

£484

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

16 Jan

LHR14:50London Heathrow

27h 32m

2 stops

SEA10:22Seattle/Tacoma Intl

26 Jan

SEA15:10Seattle/Tacoma Intl

13h 40m

1 stop

LHR12:50London Heathrow

£490

Find similar

WestJet

16 Jan

LHR14:50London Heathrow

31h 48m

1 stop

SEA14:38Seattle/Tacoma Intl

26 Jan

SEA15:10Seattle/Tacoma Intl

13h 40m

1 stop

LHR12:50London Heathrow

£501

Find similar

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 2/4

17:25-19:45

Nonstop10h 20m

Seattle/Tacoma Intl

Thu 9/4

15:35-13:10

1 stop13h 35m

£455

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 30/3

12:25-20:50

1 stop16h 25m

Seattle/Tacoma Intl

Sun 12/4

07:20-06:45

1 stop15h 25m

£458

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 25/4

21:25-17:55

1 stop28h 30m

Seattle/Tacoma Intl

Sat 2/5

15:40-11:55

1 stop12h 15m

£465

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 25/4

21:25-17:55

1 stop28h 30m

Seattle/Tacoma Intl

Sat 2/5

15:40-20:20

1 stop20h 40m

£465

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 10/3

06:35-21:18

2 stops21h 43m

Spokane

Tue 17/3

05:00-07:55

2 stops19h 55m

£555

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 10/3

06:35-21:03

2 stops21h 28m

Spokane

Tue 17/3

07:02-09:40

2 stops19h 38m

£556

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Wed 11/3

06:30-19:14

2 stops19h 44m

Portland

Thu 19/3

15:15-11:50

1 stop13h 35m

£586

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Fri 23/1

06:30-19:16

2 stops20h 46m

Spokane

Fri 30/1

06:53-07:25

1 stop16h 32m

£607

LondonPasco

LHR - PSC

LHRPSC

London Heathrow

Mon 5/1

11:05-19:56

1 stop16h 51m

Pasco Tri Cities

Sat 10/1

11:35-20:10

2 stops24h 35m

£925

LondonPasco

LHR - PSC

LHRPSC

London Heathrow

Mon 5/1

17:20-22:48

2 stops37h 28m

Pasco Tri Cities

Sat 10/1

11:35-20:10

2 stops24h 35m

£938

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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?

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 £514.

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. Travellers who choose to depart for State of Washington on a Wednesday will often find tickets for as low as £588. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to State of Washington on Sunday is £667.

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

Flying to State of Washington from London Heathrow Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as £521 when looking at flights departing in the evening. In contrast, the most expensive time of day to depart to State of Washington is in the morning when prices are around £623.

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 £569 when searching weeks before you fly. 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 £522 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 17% 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	£461
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 £461. The best return flight deal from London Heathrow Airport to State of Washington found on momondo in the last 72 hours is £517.

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?
The number of operators available for flights from London Heathrow Airport to Washington is 14 as of December 2025.
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 necessary travel and health documents for your Washington trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from London Heathrow Airport to State of Washington?
Based on momondo bookings for flights between London Heathrow Airport and State of Washington, the leading plane model is Boeing 787-9 Dreamliner, making up 32.57% of the total bookings. Other popular models include Boeing 787-10 Dreamliner with 18.69%, Airbus A330-200 with 15.29%, and Airbus A330-900neo with 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
Icelandair	PriceFrom £357	Free Cancellation	Rating 7.0 589 reviews	Search Icelandair flights
Air France	PriceFrom £386	Free Cancellation	Rating 7.4 1,504 reviews	Search Air France flights
Lufthansa	PriceFrom £396	Free Cancellation	Rating 6.8 7,626 reviews	Search Lufthansa flights
Finnair	PriceFrom £398	Free Cancellation	Rating 7.6 1,334 reviews	Search Finnair flights
KLM	PriceFrom £400	Free Cancellation	Rating 7.7 1,432 reviews	Search KLM flights
United Airlines	PriceFrom £406	Free Cancellation	Rating 7.4 9,095 reviews	Search United Airlines flights
Aer Lingus	PriceFrom £418	Free Cancellation	Rating 7.2 1,394 reviews	Search Aer Lingus flights
British Airways	PriceFrom £438	Free Cancellation	Rating 6.7 7,571 reviews	Search British Airways flights
Virgin Atlantic	PriceFrom £441	Free Cancellation	Rating 7.5 675 reviews	Search Virgin Atlantic flights
Delta	PriceFrom £446	Free Cancellation	Rating 7.9 8,007 reviews	Search Delta flights

Why use momondo?

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

It is quick and easy to find London to Washington flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Washington that suits you.

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

Yes. momondo allows you to filter the results for London to Washington flights to just show those with flexible booking policies.

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

Once you have performed a search for London to Washington 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 London to Washington right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of London to Washington flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your State of Washington trip

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Cheap flights from London Heathrow Airport to Washington from £352

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Find the cheapest flights from London Heathrow Airport to Washington

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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

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?

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 £514.

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 17% 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, United Airlines, and KLM are the most popular carriers operating from London Heathrow to Washington

Which 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, 16 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 14:00, 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?

As of December 2025, 118 flights take off from London Heathrow Airport and land in State of Washington each week. The most common flight departure day for this route is Fri, with 20% of weekly flights taking off 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, organise 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