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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 Cheapflights user in the last 72 hours by searching for a flight departing on 21/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
3 Apr — 10 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Washington

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Washington
Explore the most affordable flight options available from Heathrow to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 March 2026.

Sat 9/509:30
LHR
-
SEA
2 stops33h 13m
United Airlines
Sun 10/518:50
SEA
-
LHR
1 stop16h 50m
United Airlines
Deal found 3/3£396
Sat 6/606:40
LHR
-
SEA
1 stop15h 05m
Scandinavian Airlines
Sun 14/615:55
SEA
-
LHR
1 stop16h 05m
Scandinavian Airlines
Deal found 4/3£401
Fri 17/415:05
LHR
-
PDX
1 stop26h 05m
Air Canada
Sat 18/415:30
PDX
-
LHR
2 stops37h 50m
Air Canada
Deal found 28/2£419
Thu 23/410:15
LHR
-
PDX
2 stops40h 15m
Air Canada
Sat 25/407:15
PDX
-
LHR
2 stops46h 05m
Air Canada
Deal found 2/3£426
Tue 31/313:05
LHR
-
SEA
1 stop15h 35m
Icelandair
Tue 14/415:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 28/2£435
Sat 21/313:45
LHR
-
SEA
1 stop28h 55m
United Airlines
Mon 23/310:55
SEA
-
LHR
1 stop17h 20m
United Airlines
Deal found 1/3£443
Fri 5/606:40
LHR
-
SEA
1 stop15h 05m
Scandinavian Airlines
Sun 7/615:55
SEA
-
LHR
1 stop21h 45m
Scandinavian Airlines
Deal found 28/2£444
Tue 14/421:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Tue 21/415:40
SEA
-
LHR
1 stop20h 40m
Icelandair
Deal found 28/2£448
Wed 18/312:15
LHR
-
SEA
1 stop12h 45m
Icelandair
Sun 29/319:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Deal found 2/3£453
Wed 15/413:05
LHR
-
SEA
1 stop15h 35m
Icelandair
Wed 29/419:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Deal found 4/3£453
Fri 22/515:35
LHR
-
SEA
2 stops30h 10m
Scandinavian Airlines
Tue 26/515:55
SEA
-
LHR
1 stop18h 35m
Scandinavian Airlines
Deal found 3/3£454
Thu 16/413:05
LHR
-
SEA
1 stop12h 50m
Icelandair
Tue 28/419:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Deal found 1/3£456

Find flight deals from Heathrow to Washington

Keep the following information in mind while searching for Heathrow to Washington flight deals. Data was last updated 4 March 2026.

Round-trip from

£396

One-way from

£324

Popular in

July

Cheapest in

February

Average price

£520

Good round-trip deal

£536 or less

Good one-way deal

£477 or less
United Airlines
  • United Airlines
  • 9/5-10/5
  • 3 total stops
  • 50h 03m total
  • London to Washington
Search Deals
Icelandair
  • Icelandair
  • 21/4
  • 1 total stop
  • 15h 35m total
  • London to Washington
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£57 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from London Heathrow to Washington.
Search Deals
Price to beat on a one-way flight from London Heathrow to Washington.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to 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, Cheapflights users made 858,174 searches. Data last updated 4 March 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

Sat 25/4

21:25-20:40

1 stop31h 15m

Seattle/Tacoma Intl

Sat 2/5

15:40-11:55

1 stop12h 15m

£489

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 15/4

10:50-16:59

1 stop14h 09m

Seattle/Tacoma Intl

Wed 22/4

05:00-07:15

2 stops18h 15m

£540

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 13/4

16:25-00:44

1 stop16h 19m

Seattle/Tacoma Intl

Tue 28/4

20:20-13:45

Nonstop9h 25m

£572

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 4/5

08:40-21:40

2 stops21h 00m

Spokane

Sun 10/5

05:00-07:40

2 stops42h 40m

£575

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 15/4

07:25-18:51

2 stops19h 26m

Spokane

Wed 22/4

07:10-10:40

2 stops19h 30m

£576

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 29/4

07:25-21:11

2 stops21h 46m

Spokane

Sun 3/5

12:25-07:25

1 stop35h 00m

£578

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 4/5

15:05-22:20

1 stop15h 15m

Seattle/Tacoma Intl

Fri 15/5

22:53-06:45

1 stop23h 52m

£590

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 16/4

07:25-21:35

2 stops22h 10m

Spokane

Thu 23/4

07:10-06:55

2 stops15h 45m

£606

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 10/4

07:25-16:59

1 stop17h 34m

Seattle/Tacoma Intl

Mon 20/4

10:20-13:20

1 stop19h 00m

£608

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Mon 20/4

07:30-17:45

2 stops18h 15m

Portland

Wed 13/5

19:05-20:40

2 stops17h 35m

£612

Flights are sorted by cheapest return flights first.

Deals found on 3/3

Showing 1-10 of 60 resultsSorted by cheapest first
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2
3
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6

Best time to book a flight from Heathrow to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from Heathrow with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Washington

What is the cheapest month to book a flight from London Heathrow Airport to State of Washington?

Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to State of Washington (average of £376). Flying from London Heathrow Airport to State of Washington in July is currently the most expensive (average of £517). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LHR to WA?

Find hourly flight availability from Heathrow to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 4 March 2026.

When flying from London Heathrow Airport to State of Washington, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington. Reviews last updated 4 March 2026.
Get a feel of what it's like to fly with KLM, Virgin Atlantic, andAir France from London Heathrow Airport to Washington by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,465 reviews
Check prices

Boarding

7.8

Comfort

7.6

Food

7.3

Crew

8.4

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.7
Good
1,465 reviews
KLM
7.7
Good
1,465 reviews
Check prices

Boarding

7.8

Comfort

7.6

Food

7.3

Crew

8.4

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Virgin Atlantic
7.5
Good
680 reviews
KLM
7.7
Good
1,465 reviews
Check prices

Boarding

7.8

Comfort

7.6

Food

7.3

Crew

8.4

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Air France
7.4
Good
1,542 reviews
KLM
7.7
Good
1,465 reviews
Check prices

Boarding

7.8

Comfort

7.6

Food

7.3

Crew

8.4

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Icelandair
7.1
Good
617 reviews
KLM
7.7
Good
1,465 reviews
Check prices

Boarding

7.8

Comfort

7.6

Food

7.3

Crew

8.4

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
British Airways
6.7
Okay
7,775 reviews
KLM
7.7
Good
1,465 reviews
Check prices

Boarding

7.8

Comfort

7.6

Food

7.3

Crew

8.4

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Washington. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from London Heathrow Airport to State of Washington?

    Icelandair, United Airlines, and British Airways can get you from London Heathrow Airport to State of Washington in just under 14h 09m. Your travel time can differ by up to 17h 06m. The distance from London Heathrow Airport to State of Washington is about 4783 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from London Heathrow Airport to State of Washington one-way?

    One-way options have recently been found by users for as low as £355 on Icelandair. Other airlines that offer cheap prices include British Airways from £372 and Aer Lingus from £389 one-way.

  • What are the most popular routes from London Heathrow Airport to State of Washington?

    When deciding which route to take from London Heathrow Airport to State of Washington consider London Heathrow - Seattle/Tacoma Intl, London Heathrow - Portland or London Heathrow - Spokane as they are the most popular.

  • What are the most reliable airlines from London Heathrow Airport to State of Washington?

    The top 3 most reliable airlines when flying from London Heathrow Airport to State of Washington are KLM (93%), Air France (93%) and Delta (93%).

  • What are the cheapest flights from London Heathrow Airport to State of Washington?

    Looking for the cheapest flight from London Heathrow Airport to State of Washington? While on average our users pay £1,737, our data indicates the cheapest price to be £409. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around £396.

  • Can I find deals for flights from Heathrow to Washington that include hotel bookings?

    Yes. In addition to deals on Heathrow to Washington flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Washington?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Washington.

  • Can I find deals for business class flights from Heathrow to Washington?

    Yes. Cheapflights offers flight deals from Heathrow to Washington by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from London Heathrow Airport to State of Washington?

    Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to State of Washington (average of £376). Flying from London Heathrow Airport to State of Washington in July is currently the most expensive (average of £517). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Heathrow to Washington

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Heathrow to Washington

Discover the top 10 airlines that operate flights from Heathrow to Washington. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 4 March 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£337Average£541FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£343Average£461FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air CanadaCheapest£423Average£501FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest£425Average£605FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£432Average£617FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£444Average£623FlexibilityNo cancel feeOn-time75%
Search KLM flights
Aer LingusCheapest£452Average£675FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£453Average£621FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air FranceCheapest£453Average£640FlexibilityNo cancel feeOn-time77%
Search Air France flights
FinnairCheapest£464Average£638FlexibilityNo cancel feeOn-time76%
Search Finnair flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Heathrow to Washington?

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Why should you use Cheapflights to find cheap flight tickets from Heathrow to Washington?

Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to Washington for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Heathrow to Washington with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Heathrow to Washington flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Heathrow to Washington become cheaper?

Not ready to book yet? You can track prices for flights from Heathrow to Washington on Cheapflights with our Price Alert feature and get notified when better prices are available.

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