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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 20/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
24 Apr — 1 May1
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 25 March 2026.

Sun 3/513:05
LHR
-
SEA
1 stop15h 35m
Icelandair
Fri 8/515:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 24/3£457
Tue 19/507:05
LHR
-
SEA
2 stops21h 35m
Multiple Airlines
Tue 26/515:40
SEA
-
LHR
2 stops21h 55m
Multiple Airlines
Deal found 20/3£460
Mon 20/421:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Fri 24/415:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 20/3£463
Mon 4/521:25
LHR
-
SEA
1 stop28h 30m
Icelandair
Fri 8/519:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Deal found 21/3£476
Tue 14/413:05
LHR
-
SEA
1 stop15h 35m
Icelandair
Wed 22/415:40
SEA
-
LHR
1 stop20h 40m
Icelandair
Deal found 23/3£481
Thu 16/413:05
LHR
-
SEA
1 stop12h 50m
Icelandair
Wed 29/415:40
SEA
-
LHR
1 stop20h 40m
Icelandair
Deal found 21/3£482
Thu 23/413:05
LHR
-
SEA
1 stop15h 35m
Icelandair
Wed 6/515:40
SEA
-
LHR
1 stop20h 40m
Icelandair
Deal found 24/3£486
Thu 16/413:05
LHR
-
SEA
1 stop15h 35m
Icelandair
Fri 24/415:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 22/3£487
Wed 6/507:05
LHR
-
PDX
2 stops18h 55m
Multiple Airlines
Mon 18/515:30
PDX
-
LHR
2 stops22h 05m
Multiple Airlines
Deal found 23/3£513
Wed 6/513:05
LHR
-
PDX
1 stop12h 55m
Icelandair
Mon 18/515:30
PDX
-
LHR
1 stop12h 25m
Icelandair
Deal found 23/3£526
Tue 21/421:25
LHR
-
PDX
1 stop28h 35m
Icelandair
Tue 28/415:30
PDX
-
LHR
1 stop12h 25m
Icelandair
Deal found 24/3£531
Wed 6/513:05
LHR
-
PDX
1 stop12h 55m
Icelandair
Wed 20/519:05
PDX
-
LHR
1 stop17h 15m
Icelandair
Deal found 20/3£552

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 25 March 2026.

Round-trip from

£457

One-way from

£324

Popular in

July

Cheapest in

February

Average price

£539

Good round-trip deal

£653 or less

Good one-way deal

£501 or less
Icelandair
  • Icelandair
  • 3/5-8/5
  • 2 total stops
  • 27h 50m total
  • London to Washington
Search Deals
20/5
  • 20/5
  • 2 total stops
  • 24h 25m total
  • London to Washington
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£56 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 25 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

Cheapest return flight

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 19/9

15:35-13:45

2 stops30h 10m

Seattle/Tacoma Intl

Sat 26/9

15:55-17:00

2 stops17h 05m

£568

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 3/6

06:30-11:37

1 stop13h 07m

Seattle/Tacoma Intl

Wed 24/6

12:35-17:35

1 stop21h 00m

£581

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 28/5

19:50-13:45

2 stops25h 55m

Seattle/Tacoma Intl

Sat 6/6

15:55-18:50

2 stops18h 55m

£581

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 15/9

06:00-18:32

2 stops20h 32m

Seattle/Tacoma Intl

Wed 23/9

07:00-07:55

2 stops16h 55m

£599

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 5/5

06:30-11:42

1 stop13h 12m

Seattle/Tacoma Intl

Tue 12/5

21:45-15:35

Nonstop9h 50m

£608

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 1/9

07:25-18:29

2 stops19h 04m

Seattle/Tacoma Intl

Thu 10/9

12:15-12:20

2 stops16h 05m

£608

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 21/5

08:40-16:30

1 stop15h 50m

Seattle/Tacoma Intl

Wed 3/6

18:20-12:10

Nonstop9h 50m

£610

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 20/5

11:45-16:30

1 stop12h 45m

Seattle/Tacoma Intl

Sun 7/6

13:55-13:50

1 stop15h 55m

£625

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 8/6

11:40-14:00

Nonstop10h 20m

Seattle/Tacoma Intl

Mon 22/6

22:05-15:35

Nonstop9h 30m

£625
Fastest return journey

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 14/9

09:50-11:35

Nonstop9h 45m

Seattle/Tacoma Intl

Tue 22/9

20:20-13:45

Nonstop9h 25m

£628

Flights are sorted by cheapest return flights first.

Deals found on 20/3

Showing 1-10 of 60 resultsSorted by cheapest first
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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, February is the cheapest month in which you can book a flight from London Heathrow Airport to State of Washington (average of £369). Flying from London Heathrow Airport to State of Washington in July is currently the most expensive (average of £513). 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 25 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.

How much does it cost for a return flight from London Heathrow Airport to State of Washington?

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 25 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
7.8
Good
1,478 reviews
Check prices

Entertainment

7.1

Boarding

7.8

Comfort

7.6

Overall

7.8

Crew

8.4

Food

7.3

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
7.8
Good
1,478 reviews
KLM
7.8
Good
1,478 reviews
Check prices

Entertainment

7.1

Boarding

7.8

Comfort

7.6

Overall

7.8

Crew

8.4

Food

7.3

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
685 reviews
KLM
7.8
Good
1,478 reviews
Check prices

Entertainment

7.1

Boarding

7.8

Comfort

7.6

Overall

7.8

Crew

8.4

Food

7.3

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
1,553 reviews
KLM
7.8
Good
1,478 reviews
Check prices

Entertainment

7.1

Boarding

7.8

Comfort

7.6

Overall

7.8

Crew

8.4

Food

7.3

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
7.0
Good
625 reviews
KLM
7.8
Good
1,478 reviews
Check prices

Entertainment

7.1

Boarding

7.8

Comfort

7.6

Overall

7.8

Crew

8.4

Food

7.3

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
7,820 reviews
KLM
7.8
Good
1,478 reviews
Check prices

Entertainment

7.1

Boarding

7.8

Comfort

7.6

Overall

7.8

Crew

8.4

Food

7.3

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?

    Scandinavian Airlines, Delta, and SWISS can get you from London Heathrow Airport to State of Washington in just under 13h 07m. Your travel time can differ by up to 17h 03m. 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 £371 and Aer Lingus from £387 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 - Pasco Tri Cities 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 (98%), Air France (98%) and Delta (98%).

  • 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 £1,786, our data indicates the cheapest price to be £415. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around £457.

  • 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, February is the cheapest month in which you can book a flight from London Heathrow Airport to State of Washington (average of £369). Flying from London Heathrow Airport to State of Washington in July is currently the most expensive (average of £513). 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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Luton to Los Angeles flights
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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 25 March 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£335Average£542FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£342Average£461FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
IberiaCheapest£407Average£653FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Aer LingusCheapest£418Average£672FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
United AirlinesCheapest£423Average£608FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£428Average£615FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£442Average£627FlexibilityNo cancel feeOn-time75%
Search KLM flights
British AirwaysCheapest£450Average£625FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air FranceCheapest£451Average£642FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air CanadaCheapest£464Average£499FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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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