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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 2/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
16 Apr — 23 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 17 March 2026.

Tue 14/406:55
LHR
-
SEA
2 stops21h 45m
Multiple Airlines
Tue 21/415:40
SEA
-
LHR
2 stops21h 30m
Multiple Airlines
Deal found 16/3£465
Mon 27/421:25
LHR
-
SEA
1 stop28h 30m
Icelandair
Mon 18/519:00
SEA
-
LHR
1 stop32h 55m
Icelandair
Deal found 16/3£470
Wed 29/421:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Thu 7/519:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Deal found 16/3£471
Tue 21/406:55
LHR
-
SEA
2 stops21h 45m
Multiple Airlines
Fri 24/419:00
SEA
-
LHR
2 stops18h 50m
Multiple Airlines
Deal found 15/3£478
Thu 17/916:30
LHR
-
SEA
Nonstop9h 55m
British Airways
Tue 29/920:20
SEA
-
LHR
Nonstop9h 25m
British Airways
Deal found 14/3£480
Mon 20/421:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Tue 5/519:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Deal found 14/3£484
Tue 21/413:05
LHR
-
SEA
1 stop15h 35m
Icelandair
Fri 1/519:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Deal found 13/3£486
Mon 13/421:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Mon 20/415:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 16/3£489
Wed 22/421:25
LHR
-
SEA
1 stop28h 30m
Icelandair
Sat 2/515:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 15/3£493
Wed 15/407:30
LHR
-
PDX
2 stops18h 30m
Multiple Airlines
Mon 20/415:30
PDX
-
LHR
2 stops19h 35m
Multiple Airlines
Deal found 13/3£494
Mon 13/421:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Mon 27/415:40
SEA
-
LHR
1 stop20h 40m
Icelandair
Deal found 13/3£494
Wed 15/410:15
LHR
-
PDX
2 stops54h 55m
Air Canada
Sat 18/407:15
PDX
-
LHR
2 stops46h 05m
Air Canada
Deal found 12/3£498

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 17 March 2026.

Round-trip from

£470

One-way from

£324

Popular in

July

Cheapest in

February

Average price

£544

Good round-trip deal

£657 or less

Good one-way deal

£494 or less
Icelandair
  • Icelandair
  • 27/4-18/5
  • 2 total stops
  • 61h 25m total
  • London to Washington
Search Deals
2/5
  • 2/5
  • 2 total stops
  • 49h 00m 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 (£8 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 17 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

Wed 22/4

21:25-20:40

1 stop31h 15m

Seattle/Tacoma Intl

Sun 26/4

15:40-20:20

1 stop20h 40m

£517

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Wed 15/4

13:05-18:00

1 stop12h 55m

Portland

Mon 20/4

15:30-11:55

1 stop12h 25m

£547

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 13/5

19:50-22:45

2 stops34h 55m

Seattle/Tacoma Intl

Sun 24/5

15:55-18:50

2 stops18h 55m

£608

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

£611

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 12/9

10:50-16:59

1 stop14h 09m

Seattle/Tacoma Intl

Wed 23/9

12:29-09:40

1 stop13h 11m

£613

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 29/4

07:25-21:11

2 stops21h 46m

Spokane

Sun 3/5

16:10-09:40

1 stop33h 30m

£614

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 29/4

07:25-18:51

2 stops19h 26m

Spokane

Wed 6/5

05:00-08:20

2 stops19h 20m

£617

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 16/4

07:30-18:00

2 stops18h 30m

Seattle/Tacoma Intl

Thu 23/4

19:05-20:40

2 stops17h 35m

£617

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 17/4

06:55-16:59

1 stop18h 04m

Seattle/Tacoma Intl

Mon 20/4

08:00-09:20

2 stops17h 20m

£619

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 4/9

07:25-16:59

1 stop17h 34m

Seattle/Tacoma Intl

Mon 7/9

23:10-06:55

1 stop23h 45m

£621

Flights are sorted by cheapest return flights first.

Deals found on 12/3

Showing 1-10 of 60 resultsSorted by cheapest first
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2
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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 £372). Flying from London Heathrow Airport to State of Washington in July is currently the most expensive (average of £518). 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 17 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.

Weekly flight availability from London Heathrow Airport to State of Washington

Explore weekly flight availability from Heathrow to Washington. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 17 March 2026.

The most flights from LHR to USWA are scheduled on a Tuesday (21 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (11 on average).

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 17 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
1,473 reviews
Check prices

Comfort

7.6

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.8

Entertainment

7.1

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
1,473 reviews
KLM
7.8
Good
1,473 reviews
Check prices

Comfort

7.6

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.8

Entertainment

7.1

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
682 reviews
KLM
7.8
Good
1,473 reviews
Check prices

Comfort

7.6

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.8

Entertainment

7.1

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
1,546 reviews
KLM
7.8
Good
1,473 reviews
Check prices

Comfort

7.6

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.8

Entertainment

7.1

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
622 reviews
KLM
7.8
Good
1,473 reviews
Check prices

Comfort

7.6

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.8

Entertainment

7.1

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
7,799 reviews
KLM
7.8
Good
1,473 reviews
Check prices

Comfort

7.6

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.8

Entertainment

7.1

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, Scandinavian Airlines, and United Airlines can get you from London Heathrow Airport to State of Washington in just under 21h. Your travel time can differ by up to 13h 55m. The distance from London Heathrow Airport to State of Washington is about 4643 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 £358 on Icelandair. Other airlines that offer cheap prices include British Airways from £374 and Aer Lingus from £391 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 (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 £1,800, our data indicates the cheapest price to be £420. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around £465.

  • 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 £372). Flying from London Heathrow Airport to State of Washington in July is currently the most expensive (average of £518). 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 17 March 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£338Average£547FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£344Average£463FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
IberiaCheapest£410Average£658FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Aer LingusCheapest£422Average£679FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
United AirlinesCheapest£427Average£613FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£432Average£619FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£446Average£628FlexibilityNo cancel feeOn-time75%
Search KLM flights
British AirwaysCheapest£454Average£627FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air FranceCheapest£455Average£649FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air CanadaCheapest£468Average£503FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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

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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.

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