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Cheap flights from London Heathrow Airport to Washington from £324

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Washington departing on 10/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap return flights

Enter your travel dates to find the best prices.
Virgin Atlantic Logo
06:20 - 11:25
LHR
-
SEA
13h 05m
1 stop
Virgin Atlantic Logo
08:30 - 08:45
SEA
-
LHR
16h 15m
1 stop
£366Virgin Atlantic
Tue, 17 Feb - Tue, 24 Feb
Lufthansa Logo
06:30 - 12:10
LHR
-
SEA
13h 40m
1 stop
Lufthansa Logo
15:40 - 11:50
SEA
-
LHR
12h 10m
1 stop
£368Lufthansa
Mon, 16 Feb - Mon, 2 Mar
Virgin Atlantic Logo
06:20 - 12:25
LHR
-
SEA
13h 05m
1 stop
Virgin Atlantic Logo
07:20 - 06:50
SEA
-
LHR
16h 30m
1 stop
£369Virgin Atlantic
Thu, 19 Mar - Thu, 26 Mar
Icelandair Logo
12:15 - 17:00
LHR
-
SEA
12h 45m
1 stop
Icelandair Logo
15:35 - 10:50
SEA
-
LHR
12h 15m
1 stop
£369Icelandair
Thu, 19 Feb - Wed, 11 Mar
Aer Lingus Logo
09:50 - 18:20
LHR
-
SEA
16h 30m
1 stop
Aer Lingus Logo
20:05 - 19:50
SEA
-
LHR
15h 45m
1 stop
£370Aer Lingus
Mon, 16 Feb - Mon, 2 Mar
Icelandair Logo
12:15 - 17:00
LHR
-
SEA
12h 45m
1 stop
Icelandair Logo
14:35 - 19:30
SEA
-
LHR
20h 55m
1 stop
£372Icelandair
Thu, 19 Feb - Tue, 3 Mar
United Airlines Logo
13:45 - 11:36
LHR
-
PSC
52h 51m
2 stops
United Airlines Logo
05:05 - 09:10
PSC
-
LHR
21h 05m
2 stops
£554United Airlines
Wed, 18 Mar - Wed, 25 Mar
United Airlines Logo
06:35 - 21:03
LHR
-
GEG
21h 28m
2 stops
United Airlines Logo
06:00 - 06:40
GEG
-
LHR
17h 40m
2 stops
£557United Airlines
Tue, 10 Mar - Tue, 17 Mar
KLM Logo
11:40 - 14:43
LHR
-
PSC
35h 03m
1 stop
KLM Logo
17:00 - 10:00
PSC
-
LHR
33h 00m
1 stop
£1,062KLM
Sun, 7 Jun - Sun, 9 Aug
KLM Logo
17:45 - 14:43
LHR
-
PSC
28h 58m
1 stop
KLM Logo
12:35 - 15:35
PSC
-
LHR
19h 00m
1 stop
£1,072KLM
Sun, 7 Jun - Sun, 9 Aug

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
4 Mar
LHR07:50London Heathrow
18h 30m
1 stop
SEA18:20Seattle/Tacoma Intl
11 Mar
SEA19:50Seattle/Tacoma Intl
9h 30m
LHR12:20London Heathrow
£407
British Airways
12 Apr
LHR22:00London Heathrow
27h 10m
1 stop
SEA17:10Seattle/Tacoma Intl
21 Apr
SEA13:19Seattle/Tacoma Intl
13h 11m
1 stop
LHR10:30London Heathrow
£408
British Airways
20 Jul
LHR16:30London Heathrow
14h 06m
1 stop
GEG22:36Spokane
3 Aug
GEG15:40Spokane
13h 20m
1 stop
LHR13:00London Heathrow
£1,678

Virgin Atlantic flights from London Heathrow Airport to State of Washington

Our best Virgin Atlantic deals on London Heathrow Airport to State of Washington flight tickets
Virgin Atlantic
17 Feb
LHR06:20London Heathrow
13h 05m
1 stop
SEA11:25Seattle/Tacoma Intl
24 Feb
SEA08:30Seattle/Tacoma Intl
16h 15m
1 stop
LHR08:45London Heathrow
£366
Virgin Atlantic
19 Mar
LHR06:20London Heathrow
13h 05m
1 stop
SEA12:25Seattle/Tacoma Intl
26 Mar
SEA07:20Seattle/Tacoma Intl
16h 30m
1 stop
LHR06:50London Heathrow
£369
Virgin Atlantic
19 Mar
LHR06:20London Heathrow
13h 05m
1 stop
SEA12:25Seattle/Tacoma Intl
26 Mar
SEA19:25Seattle/Tacoma Intl
9h 30m
LHR11:55London Heathrow
£371

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport to State of Washington that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 3 February 2026.
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 17/2

06:20-11:25

1 stop13h 05m

Seattle/Tacoma Intl

Tue 24/2

08:30-08:45

1 stop16h 15m

£366

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 16/2

06:30-12:10

1 stop13h 40m

Seattle/Tacoma Intl

Mon 2/3

15:40-11:50

1 stop12h 10m

£368

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 19/3

06:20-12:25

1 stop13h 05m

Seattle/Tacoma Intl

Thu 26/3

07:20-06:50

1 stop16h 30m

£369

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 19/2

12:15-17:00

1 stop12h 45m

Seattle/Tacoma Intl

Wed 11/3

15:35-10:50

1 stop12h 15m

£369

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 16/2

09:50-18:20

1 stop16h 30m

Seattle/Tacoma Intl

Mon 2/3

20:05-19:50

1 stop15h 45m

£370

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 19/2

12:15-17:00

1 stop12h 45m

Seattle/Tacoma Intl

Tue 3/3

14:35-19:30

1 stop20h 55m

£372

LondonPasco

LHR - PSC

LHRPSC

London Heathrow

Wed 18/3

13:45-11:36

2 stops52h 51m

Pasco Tri Cities

Wed 25/3

05:05-09:10

2 stops21h 05m

£554

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 10/3

06:35-21:03

2 stops21h 28m

Spokane

Tue 17/3

06:00-06:40

2 stops17h 40m

£557

LondonPasco

LHR - PSC

LHRPSC

London Heathrow

Sun 7/6

11:40-14:43

1 stop35h 03m

Pasco Tri Cities

Sun 9/8

17:00-10:00

1 stop33h 00m

£1,062

LondonPasco

LHR - PSC

LHRPSC

London Heathrow

Sun 7/6

17:45-14:43

1 stop28h 58m

Pasco Tri Cities

Sun 9/8

12:35-15:35

1 stop19h 00m

£1,072

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington from

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 January is also cheap. Prices for this month can be found on momondo for an average of £498.

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 £574. 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 £642.

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 morning is the least expensive time of day to depart. momondo users have found prices as low as £599 when looking at flights departing in the morning. In contrast, the most expensive time of day to depart to State of Washington is in the afternoon when prices are around £609.

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 £550 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 £515 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

£452

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 £452. The best return flight deal from London Heathrow Airport to State of Washington found on momondo in the last 72 hours is £447.
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?

  • 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?

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
LufthansaPriceFrom £329Free CancellationRating
6.8
7,758 reviews
Search Lufthansa flights
IcelandairPriceFrom £337Free CancellationRating
7.1
606 reviews
Search Icelandair flights
IberiaPriceFrom £398Free CancellationRating
7.0
3,101 reviews
Search Iberia flights
Aer LingusPriceFrom £410Free CancellationRating
7.2
1,444 reviews
Search Aer Lingus flights
Air CanadaPriceFrom £413Free CancellationRating
7.1
10,676 reviews
Search Air Canada flights
United AirlinesPriceFrom £422Free CancellationRating
7.4
9,231 reviews
Search United Airlines flights
Virgin AtlanticPriceFrom £423Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights
FinnairPriceFrom £429Free CancellationRating
7.6
1,357 reviews
Search Finnair flights
DeltaPriceFrom £433Free CancellationRating
7.9
8,135 reviews
Search Delta flights
KLMPriceFrom £433Free CancellationRating
7.7
1,448 reviews
Search KLM 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.

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