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

WestJet, Icelandair, and United Airlines 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 56% of people opting to fly with this airline when travelling to State of Washington. Keep in mind that there are 15 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 15 as of April 2026.

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.

£331 Cheap Flights from London Heathrow Airport to State of Washington in 2026

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

As of April 2026, 22 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 09:00, with 68% of daily flights taking off in the afternoon.

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

As of April 2026, 159 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 17% of weekly flights taking off on this day.

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Find the cheapest flights from London Heathrow Airport to Washington

Round-trip

One-way

Last minute

Direct

Cheap return flights

Enter your travel dates to find the best prices.

13:05 - 17:55

LHR

SEA

12h 50m

1 stop

15:40 - 11:55

SEA

LHR

12h 15m

1 stop

£446Icelandair

Thu, 23 Apr - Sun, 3 May

13:05 - 20:40

LHR

SEA

15h 35m

1 stop

15:40 - 11:55

SEA

LHR

12h 15m

1 stop

£446Icelandair

Tue, 21 Apr - Sun, 3 May

09:50 - 11:35

LHR

SEA

9h 45mdirect

13:30 - 06:45

SEA

LHR

9h 15mdirect

£456British Airways

Fri, 22 May - Wed, 24 Jun

09:50 - 11:35

LHR

SEA

9h 45mdirect

13:30 - 06:45

SEA

LHR

9h 15mdirect

£466British Airways

Tue, 21 Apr - Mon, 4 May

07:25 - 21:11

LHR

GEG

21h 46m

2 stops

12:25 - 18:40

GEG

LHR

22h 15m

2 stops

£649Lufthansa

Tue, 28 Apr - Tue, 5 May

07:25 - 21:34

LHR

GEG

22h 09m

2 stops

06:00 - 07:25

GEG

LHR

17h 25m

1 stop

£661United Airlines

Tue, 28 Apr - Tue, 5 May

08:40 - 11:16

LHR

GEG

34h 36m

2 stops

05:00 - 05:55

GEG

LHR

16h 55m

2 stops

£664United Airlines

Mon, 11 May - Mon, 18 May

17:00 - 18:46

LHR

BLI

33h 46m

1 stop

18:25 - 15:05

BLI

LHR

12h 40m

1 stop

£716Alaska Airlines

Fri, 18 Sep - Sat, 10 Oct

10:50 - 21:35

LHR

GEG

42h 45m

2 stops

08:55 - 20:40

GEG

LHR

51h 45m

2 stops

£724Lufthansa

Sat, 25 Apr - Sat, 2 May

17:00 - 13:26

LHR

BLI

28h 26m

1 stop

14:06 - 15:05

BLI

LHR

16h 59m

1 stop

£966Alaska Airlines

Wed, 9 Sep - Sun, 13 Sep

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

23 Apr

LHR13:05London Heathrow

12h 50m

1 stop

SEA17:55Seattle/Tacoma Intl

3 May

SEA15:40Seattle/Tacoma Intl

12h 15m

1 stop

LHR11:55London Heathrow

£446

Icelandair

21 Apr

LHR13:05London Heathrow

15h 35m

1 stop

SEA20:40Seattle/Tacoma Intl

3 May

SEA15:40Seattle/Tacoma Intl

12h 15m

1 stop

LHR11:55London Heathrow

£446

Icelandair

22 Apr

LHR13:05London Heathrow

15h 35m

1 stop

SEA20:40Seattle/Tacoma Intl

5 May

SEA15:40Seattle/Tacoma Intl

12h 15m

1 stop

LHR11:55London Heathrow

£458

British Airways flights from London Heathrow Airport to State of Washington

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

British Airways

22 May

LHR09:50London Heathrow

9h 45m

SEA11:35Seattle/Tacoma Intl

24 Jun

SEA13:30Seattle/Tacoma Intl

9h 15m

LHR06:45London Heathrow

£456

British Airways

21 Apr

LHR09:50London Heathrow

9h 45m

SEA11:35Seattle/Tacoma Intl

4 May

SEA13:30Seattle/Tacoma Intl

9h 15m

LHR06:45London Heathrow

£466

British Airways

22 Apr

LHR09:50London Heathrow

9h 45m

SEA11:35Seattle/Tacoma Intl

5 May

SEA20:20Seattle/Tacoma Intl

9h 25m

LHR13:45London Heathrow

£484

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

Cheapest return flight

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 23/4

13:05-17:55

1 stop12h 50m

Seattle/Tacoma Intl

Sun 3/5

15:40-11:55

1 stop12h 15m

£446

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 21/4

13:05-20:40

1 stop15h 35m

Seattle/Tacoma Intl

Sun 3/5

15:40-11:55

1 stop12h 15m

£446

Fastest return journey

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 22/5

09:50-11:35

Nonstop9h 45m

Seattle/Tacoma Intl

Wed 24/6

13:30-06:45

Nonstop9h 15m

£456

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 21/4

09:50-11:35

Nonstop9h 45m

Seattle/Tacoma Intl

Mon 4/5

13:30-06:45

Nonstop9h 15m

£466

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 28/4

07:25-21:11

2 stops21h 46m

Spokane

Tue 5/5

12:25-18:40

2 stops22h 15m

£649

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 28/4

07:25-21:34

2 stops22h 09m

Spokane

Tue 5/5

06:00-07:25

1 stop17h 25m

£661

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 11/5

08:40-11:16

2 stops34h 36m

Spokane

Mon 18/5

05:00-05:55

2 stops16h 55m

£664

LondonBellingham

LHR - BLI

LHRBLI

London Heathrow

Fri 18/9

17:00-18:46

1 stop33h 46m

Bellingham

Sat 10/10

18:25-15:05

1 stop12h 40m

£716

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Sat 25/4

10:50-21:35

2 stops42h 45m

Spokane

Sat 2/5

08:55-20:40

2 stops51h 45m

£724

LondonBellingham

LHR - BLI

LHRBLI

London Heathrow

Wed 9/9

17:00-13:26

1 stop28h 26m

Bellingham

Sun 13/9

14:06-15:05

1 stop16h 59m

£966

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 January 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 £604. 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 £676.

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 at midday is the least expensive time of day to depart. momondo users have found prices as low as £624 when looking at flights departing at midday. In contrast, the most expensive time of day to depart to State of Washington is in the afternoon when prices are around £643.

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 £580 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 £542 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.

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	£507
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 £507. The best return flight deal from London Heathrow Airport to State of Washington found on momondo in the last 72 hours is £664.

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).

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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 15 as of April 2026.
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 787-10 Dreamliner, making up 22.70% of the total bookings. Other popular models include Boeing 787-9 Dreamliner with 18.98%, Airbus A330-900neo with 18.78%, and Boeing 777-300ER with 13.00%.

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
Lufthansa	PriceFrom £340	Free Cancellation	Rating 6.8 7,882 reviews	Search Lufthansa flights
Icelandair	PriceFrom £346	Free Cancellation	Rating 7.0 630 reviews	Search Icelandair flights
Iberia	PriceFrom £412	Free Cancellation	Rating 7.0 3,162 reviews	Search Iberia flights
Aer Lingus	PriceFrom £424	Free Cancellation	Rating 7.2 1,495 reviews	Search Aer Lingus flights
Virgin Atlantic	PriceFrom £434	Free Cancellation	Rating 7.5 685 reviews	Search Virgin Atlantic flights
United Airlines	PriceFrom £437	Free Cancellation	Rating 7.4 9,534 reviews	Search United Airlines flights
KLM	PriceFrom £448	Free Cancellation	Rating 7.8 1,481 reviews	Search KLM flights
British Airways	PriceFrom £456	Free Cancellation	Rating 6.7 7,842 reviews	Search British Airways flights
Air France	PriceFrom £457	Free Cancellation	Rating 7.4 1,559 reviews	Search Air France flights
Finnair	PriceFrom £468	Free Cancellation	Rating 7.7 1,376 reviews	Search Finnair 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.