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

WestJet is the most popular carrier 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 51% of people opting to fly with this airline when travelling to State of Washington. Keep in mind that there are 13 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 August 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.

£254 Cheap Flights from London Heathrow Airport to State of Washington in 2025

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

As of August 2025, 181 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 Mon, with 15% of weekly flights taking off on this day.

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

As of August 2025, 25 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 16:00, with 72% of daily flights taking off in the afternoon.

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Find the cheapest flights from London Heathrow Airport to Washington

Round-trip

One-way

Last minute

Direct

Cheap return flights

08:50 - 17:50LHR-SEA

17h 00m1 stop

19:35 - 15:55SEA-LHR

12h 20m1 stop

£393Aer Lingus

Find Deal

Tue, 9 Sep - Tue, 16 Sep

20:35 - 17:00LHR-SEA

28h 25m1 stop

14:35 - 19:30SEA-LHR

20h 55m1 stop

£406Icelandair

Find Deal

Thu, 6 Nov - Tue, 18 Nov

08:50 - 17:50LHR-SEA

17h 00m1 stop

19:35 - 18:55SEA-LHR

15h 20m1 stop

£406Aer Lingus

Find Deal

Tue, 9 Sep - Wed, 24 Sep

12:00 - 17:50LHR-SEA

13h 50m1 stop

19:35 - 20:20SEA-LHR

16h 45m1 stop

£407Aer Lingus

Find Deal

Mon, 15 Sep - Thu, 18 Sep

13:25 - 21:11LHR-GEG

15h 46m1 stop

15:37 - 14:15GEG-LHR

14h 38m1 stop

£530Virgin Atlantic

Find Deal

Wed, 1 Oct - Wed, 8 Oct

15:40 - 17:35LHR-PDX

9h 55mdirect

11:18 - 09:05PDX-LHR

13h 47m1 stop

£533British Airways

Find Deal

Tue, 2 Sep - Tue, 16 Sep

13:30 - 22:04LHR-PDX

16h 34m1 stop

19:25 - 13:00PDX-LHR

9h 35mdirect

£538British Airways

Find Deal

Mon, 1 Sep - Wed, 10 Sep

06:30 - 11:20LHR-PDX

12h 50m1 stop

11:50 - 08:55PDX-LHR

13h 05m1 stop

£541Virgin Atlantic

Find Deal

Mon, 1 Sep - Wed, 10 Sep

06:30 - 16:32LHR-PSC

18h 02m2 stops

06:10 - 10:30PSC-LHR

20h 20m1 stop

£1,165KLM

Find Deal

Mon, 3 Nov - Fri, 7 Nov

10:55 - 22:27LHR-PSC

19h 32m1 stop

13:00 - 14:15PSC-LHR

17h 15m1 stop

£1,881Air France

Find Deal

Tue, 2 Sep - Sat, 6 Sep

Aer Lingus flights from London Heathrow Airport to State of Washington

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

Aer Lingus

9 Sept

LHR08:50London Heathrow

17h 00m

1 stop

SEA17:50Seattle/Tacoma Intl

16 Sept

SEA19:35Seattle/Tacoma Intl

12h 20m

1 stop

LHR15:55London Heathrow

£393

Find similar

Aer Lingus

9 Sept

LHR08:50London Heathrow

17h 00m

1 stop

SEA17:50Seattle/Tacoma Intl

24 Sept

SEA19:35Seattle/Tacoma Intl

15h 20m

1 stop

LHR18:55London Heathrow

£406

Find similar

Aer Lingus

15 Sept

LHR12:00London Heathrow

13h 50m

1 stop

SEA17:50Seattle/Tacoma Intl

18 Sept

SEA19:35Seattle/Tacoma Intl

16h 45m

1 stop

LHR20:20London Heathrow

£407

Find similar

Icelandair flights from London Heathrow Airport to State of Washington

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

Icelandair

6 Nov

LHR20:35London Heathrow

28h 25m

1 stop

SEA17:00Seattle/Tacoma Intl

18 Nov

SEA14:35Seattle/Tacoma Intl

20h 55m

1 stop

LHR19:30London Heathrow

£406

Find similar

Icelandair

24 Sept

LHR13:05London Heathrow

15h 35m

1 stop

SEA20:40Seattle/Tacoma Intl

7 Oct

SEA15:45Seattle/Tacoma Intl

20h 35m

1 stop

LHR20:20London Heathrow

£409

Find similar

Icelandair

17 Sept

LHR13:05London Heathrow

15h 35m

1 stop

SEA20:40Seattle/Tacoma Intl

29 Sept

SEA19:00Seattle/Tacoma Intl

32h 55m

1 stop

LHR11:55London Heathrow

£410

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

Tue 9/9

08:50-17:50

1 stop17h 00m

Seattle/Tacoma Intl

Tue 16/9

19:35-15:55

1 stop12h 20m

£393

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 6/11

20:35-17:00

1 stop28h 25m

Seattle/Tacoma Intl

Tue 18/11

14:35-19:30

1 stop20h 55m

£406

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 9/9

08:50-17:50

1 stop17h 00m

Seattle/Tacoma Intl

Wed 24/9

19:35-18:55

1 stop15h 20m

£406

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 15/9

12:00-17:50

1 stop13h 50m

Seattle/Tacoma Intl

Thu 18/9

19:35-20:20

1 stop16h 45m

£407

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 1/10

13:25-21:11

1 stop15h 46m

Spokane

Wed 8/10

15:37-14:15

1 stop14h 38m

£530

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Tue 2/9

15:40-17:35

Nonstop9h 55m

Portland

Tue 16/9

11:18-09:05

1 stop13h 47m

£533

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Mon 1/9

13:30-22:04

1 stop16h 34m

Portland

Wed 10/9

19:25-13:00

Nonstop9h 35m

£538

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Mon 1/9

06:30-11:20

1 stop12h 50m

Portland

Wed 10/9

11:50-08:55

1 stop13h 05m

£541

LondonPasco

LHR - PSC

LHRPSC

London Heathrow

Mon 3/11

06:30-16:32

2 stops18h 02m

Pasco Tri Cities

Fri 7/11

06:10-10:30

1 stop20h 20m

£1,165

LondonPasco

LHR - PSC

LHRPSC

London Heathrow

Tue 2/9

10:55-22:27

1 stop19h 32m

Pasco Tri Cities

Sat 6/9

13:00-14:15

1 stop17h 15m

£1,881

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 November is also cheap. Prices for this month can be found on momondo for an average of £508.

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 £582. 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 £690.

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 £515 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 afternoon 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 £570 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 £520 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?

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

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	£254
Fastest flight time	9h 55m
Direct flights	Every day
Airports in State of Washington	5 airports

The best one-way flight to State of Washington from London Heathrow Airport in the past 72 hours is £254. The best return flight deal from London Heathrow Airport to State of Washington found on momondo in the last 72 hours is £393.

The fastest flight from London Heathrow Airport to State of Washington takes 9h 55m

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

There are 5 airports near State of Washington: Pasco Tri Cities (PSC), Portland (PDX), Spokane (GEG), Seattle/Tacoma Intl (SEA), Bellingham (BLI)

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 August 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 Airbus A330-900neo, making up 25.95% of the total bookings. Other popular models include Boeing 787-10 Dreamliner with 20.63%, Boeing 787-9 Dreamliner with 15.51%, and Boeing 777-300ER with 13.97%.

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 £352	Free Cancellation	Rating 7.0 527 reviews	Search Icelandair flights
Air France	PriceFrom £381	Free Cancellation	Rating 7.4 1,468 reviews	Search Air France flights
Lufthansa	PriceFrom £391	Free Cancellation	Rating 6.8 7,330 reviews	Search Lufthansa flights
Finnair	PriceFrom £400	Free Cancellation	Rating 7.6 1,320 reviews	Search Finnair flights
KLM	PriceFrom £400	Free Cancellation	Rating 7.8 1,385 reviews	Search KLM flights
United Airlines	PriceFrom £401	Free Cancellation	Rating 7.4 8,925 reviews	Search United Airlines flights
British Airways	PriceFrom £427	Free Cancellation	Rating 6.6 7,277 reviews	Search British Airways flights
Virgin Atlantic	PriceFrom £439	Free Cancellation	Rating 7.4 657 reviews	Search Virgin Atlantic flights
Delta	PriceFrom £440	Free Cancellation	Rating 8.0 7,981 reviews	Search Delta flights
Air Canada	PriceFrom £459	Free Cancellation	Rating 7.1 9,992 reviews	Search Air Canada 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 £254

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Big names, great deals

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Find the cheapest flights from London Heathrow Airport to Washington

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Aer Lingus flights from London Heathrow Airport to State of Washington

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

Icelandair flights from London Heathrow Airport to State of Washington

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

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

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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

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 November is also cheap. Prices for this month can be found on momondo for an average of £508.

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?

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

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

WestJet is the most popular carrier 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 August 2025, 25 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 16:00, with 72% 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 August 2025, 181 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 Mon, with 15% 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