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

WestJet, SWISS, and British Airways 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 57% 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 May 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.

£337 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 May 2026, 27 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 50% 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 May 2026, 191 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.

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

21:25 - 11:45

LHR

SEA

22h 20m

1 stop

23:25 - 20:20

SEA

LHR

12h 55m

1 stop

£527Icelandair

Mon, 15 Jun - Mon, 29 Jun

13:05 - 20:40

LHR

SEA

15h 35m

1 stop

23:25 - 11:55

SEA

LHR

28h 30m

1 stop

£529Icelandair

Wed, 3 Jun - Wed, 10 Jun

21:25 - 11:45

LHR

SEA

22h 20m

1 stop

23:25 - 20:20

SEA

LHR

12h 55m

1 stop

£530Icelandair

Sun, 30 Aug - Mon, 7 Sep

14:45 - 13:17

LHR

BLI

30h 32m

1 stop

19:37 - 12:20

BLI

LHR

32h 43m

1 stop

£589Alaska Airlines

Wed, 11 Nov - Sun, 15 Nov

14:45 - 13:17

LHR

BLI

30h 32m

1 stop

19:37 - 12:20

BLI

LHR

32h 43m

1 stop

£590Alaska Airlines

Wed, 11 Nov - Sun, 15 Nov

08:40 - 22:36

LHR

GEG

21h 56m

2 stops

05:00 - 07:15

GEG

LHR

18h 15m

2 stops

£669United Airlines

Wed, 2 Sep - Wed, 9 Sep

14:50 - 21:14

LHR

GEG

14h 24m

1 stop

13:38 - 12:35

GEG

LHR

14h 57m

1 stop

£690Lufthansa

Wed, 2 Sep - Wed, 9 Sep

12:00 - 21:32

LHR

PDX

17h 32m

1 stop

08:50 - 09:40

PDX

LHR

16h 50m

1 stop

£691United Airlines

Thu, 2 Jul - Sun, 5 Jul

06:30 - 22:45

LHR

PDX

24h 15m

2 stops

10:35 - 09:40

PDX

LHR

15h 05m

1 stop

£692Lufthansa

Tue, 1 Sep - Wed, 16 Sep

06:30 - 19:42

LHR

PSC

21h 12m

2 stops

12:30 - 15:35

PSC

LHR

19h 05m

1 stop

£878Delta

Mon, 29 Jun - Mon, 6 Jul

Delta flights from London Heathrow Airport to State of Washington

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

Delta

10 Nov

LHR06:30London Heathrow

13h 17m

1 stop

SEA11:47Seattle/Tacoma Intl

17 Nov

SEA11:15Seattle/Tacoma Intl

15h 00m

1 stop

LHR10:15London Heathrow

£560

Delta

8 Jun

LHR17:45London Heathrow

14h 14m

1 stop

PSC23:59Pasco Tri Cities

16 Aug

PSC17:24Pasco Tri Cities

18h 46m

2 stops

LHR20:10London Heathrow

£1,112

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

15 Jun

LHR21:25London Heathrow

22h 20m

1 stop

SEA11:45Seattle/Tacoma Intl

29 Jun

SEA23:25Seattle/Tacoma Intl

12h 55m

1 stop

LHR20:20London Heathrow

£527

Icelandair

3 Jun

LHR13:05London Heathrow

15h 35m

1 stop

SEA20:40Seattle/Tacoma Intl

10 Jun

SEA23:25Seattle/Tacoma Intl

28h 30m

1 stop

LHR11:55London Heathrow

£529

Icelandair

30 Aug

LHR21:25London Heathrow

22h 20m

1 stop

SEA11:45Seattle/Tacoma Intl

7 Sept

SEA23:25Seattle/Tacoma Intl

12h 55m

1 stop

LHR20:20London Heathrow

£530

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

Mon 15/6

21:25-11:45

1 stop22h 20m

Seattle/Tacoma Intl

Mon 29/6

23:25-20:20

1 stop12h 55m

£527

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 3/6

13:05-20:40

1 stop15h 35m

Seattle/Tacoma Intl

Wed 10/6

23:25-11:55

1 stop28h 30m

£529

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sun 30/8

21:25-11:45

1 stop22h 20m

Seattle/Tacoma Intl

Mon 7/9

23:25-20:20

1 stop12h 55m

£530

LondonBellingham

LHR - BLI

LHRBLI

London Heathrow

Wed 11/11

14:45-13:17

1 stop30h 32m

Bellingham

Sun 15/11

19:37-12:20

1 stop32h 43m

£589

LondonBellingham

LHR - BLI

LHRBLI

London Heathrow

Wed 11/11

14:45-13:17

1 stop30h 32m

Bellingham

Sun 15/11

19:37-12:20

1 stop32h 43m

£590

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 2/9

08:40-22:36

2 stops21h 56m

Spokane

Wed 9/9

05:00-07:15

2 stops18h 15m

£669

Fastest return journey

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 2/9

14:50-21:14

1 stop14h 24m

Spokane

Wed 9/9

13:38-12:35

1 stop14h 57m

£690

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Thu 2/7

12:00-21:32

1 stop17h 32m

Portland

Sun 5/7

08:50-09:40

1 stop16h 50m

£691

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Tue 1/9

06:30-22:45

2 stops24h 15m

Portland

Wed 16/9

10:35-09:40

1 stop15h 05m

£692

LondonPasco

LHR - PSC

LHRPSC

London Heathrow

Mon 29/6

06:30-19:42

2 stops21h 12m

Pasco Tri Cities

Mon 6/7

12:30-15:35

1 stop19h 05m

£878

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 £323.

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 Thursday. Travellers who choose to depart for State of Washington on a Thursday 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 £683.

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 £609 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 £640.

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 from London Heathrow Airport to 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 £586 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 £527 on momondo.

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	£542
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 £542. The best return flight deal from London Heathrow Airport to State of Washington found on momondo in the last 72 hours is £564.

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 Seattle/Tacoma Intl (SEA).

Search flight deals

Frequently asked questions about flying from London Heathrow Airport to Washington

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 May 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 Airbus A330-900neo, making up 21.69% of the total bookings. Other popular models include Boeing 787-10 Dreamliner with 21.44%, Boeing 787-9 Dreamliner with 19.96%, and Boeing 777-300ER with 14.78%.

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 £336	Free Cancellation	Rating 6.8 8,004 reviews	Search Lufthansa flights
Icelandair	PriceFrom £343	Free Cancellation	Rating 7.0 654 reviews	Search Icelandair flights
Aer Lingus	PriceFrom £420	Free Cancellation	Rating 7.3 1,563 reviews	Search Aer Lingus flights
Virgin Atlantic	PriceFrom £431	Free Cancellation	Rating 7.4 688 reviews	Search Virgin Atlantic flights
KLM	PriceFrom £439	Free Cancellation	Rating 7.8 1,517 reviews	Search KLM flights
Air France	PriceFrom £453	Free Cancellation	Rating 7.4 1,586 reviews	Search Air France flights
British Airways	PriceFrom £455	Free Cancellation	Rating 6.7 7,982 reviews	Search British Airways flights
Finnair	PriceFrom £463	Free Cancellation	Rating 7.7 1,396 reviews	Search Finnair flights
Air Canada	PriceFrom £466	Free Cancellation	Rating 7.1 11,055 reviews	Search Air Canada flights
United Airlines	PriceFrom £469	Free Cancellation	Rating 7.4 9,730 reviews	Search United Airlines 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

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.

Start using Trips

Find my bookings

Get notified when prices go down

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

1 adult

Mon 15/6

Mon 22/6

Email me momondo's favourite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Washington

Popular cities

Other flights from London Heathrow Airport

Other flights to Washington

Airlines

Complete your trip

Feeling lucky

Popular Cities in Washington

Flights to New Yorkfrom £327

Flights to Orlandofrom £367

Flights to Los Angelesfrom £363

Flights to Miamifrom £374

Flights to San Franciscofrom £465

Flights to Bostonfrom £355

Flights to Washington, D.C.from £381

Flights to Chicagofrom £458

Flights to Las Vegasfrom £533

Flights to Atlantafrom £444

Flights to Houstonfrom £528

Flights to Dallasfrom £592

Cheap flights from London Heathrow Airport to Washington from £337

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from London Heathrow Airport to Washington

Cheap return flights

Cheap one-way flights

Cheap last-minute flights

Cheap direct flights

Delta flights from London Heathrow Airport to State of Washington

Our best Delta 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

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?

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

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

What is the cheapest airline that flies 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?

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

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

Frequently asked questions about flying from London Heathrow Airport to 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?

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

London Heathrow Airport flight routes

According to popular flight searches on momondo this year

State of Washington flight routes

According to popular flight searches on momondo this year

Fly your favourite airline to Washington

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Complete your trip to Washington

Explore popular destinations other users love

According to popular flight searches on momondo this year