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Cheap flights from London Heathrow Airport to Washington from £321

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 15/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
22 Mar — 29 Mar1
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 20 February 2026.

Thu 5/312:15
LHR
-
SEA
1 stop12h 45m
Icelandair
Tue 10/315:35
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 20/2£426
Wed 4/320:35
LHR
-
SEA
1 stop28h 25m
Icelandair
Tue 17/315:35
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 17/2£431
Tue 10/312:15
LHR
-
SEA
1 stop12h 45m
Icelandair
Tue 17/315:35
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 17/2£431
Tue 17/320:35
LHR
-
SEA
1 stop28h 25m
Icelandair
Sun 29/319:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Deal found 19/2£433
Wed 18/312:15
LHR
-
SEA
1 stop12h 45m
Icelandair
Thu 26/315:35
SEA
-
LHR
1 stop20h 55m
Icelandair
Deal found 18/2£435
Mon 20/413:05
LHR
-
SEA
1 stop15h 35m
Icelandair
Fri 24/419:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Deal found 20/2£437
Mon 13/421:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Tue 28/415:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 20/2£438
Wed 15/421:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Wed 22/415:40
SEA
-
LHR
1 stop20h 40m
Icelandair
Deal found 20/2£439
Wed 20/513:05
LHR
-
PDX
1 stop12h 50m
Icelandair
Thu 28/515:30
PDX
-
LHR
1 stop12h 25m
Icelandair
Deal found 20/2£480
Wed 18/307:40
LHR
-
GEG
2 stops20h 38m
Lufthansa
Wed 25/313:37
GEG
-
LHR
1 stop13h 03m
Lufthansa
Deal found 18/2£538
Tue 14/415:05
LHR
-
PDX
1 stop26h 05m
Air Canada
Sat 18/407:15
PDX
-
LHR
2 stops46h 05m
Air Canada
Deal found 18/2£540
Tue 14/408:45
LHR
-
GEG
2 stops22h 07m
Multiple Airlines
Tue 28/407:09
GEG
-
LHR
2 stops20h 36m
Multiple Airlines
Deal found 17/2£549

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 20 February 2026.

Round-trip from

£426

One-way from

£321

Popular in

July

Cheapest in

February

Average price

£483

Good round-trip deal

£465 or less

Good one-way deal

£470 or less
Icelandair
  • Icelandair
  • 5/3-10/3
  • 2 total stops
  • 25h 00m total
  • London to Washington
Search Deals
Icelandair
  • Icelandair
  • 15/4
  • 1 total stop
  • 12h 50m 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 (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 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 20 February 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Washington that are best for you.

Fly from

Heathrow

Fly to

Washington

Route

Depart

Return

Price

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 4/3

20:35-17:00

1 stop28h 25m

Seattle/Tacoma Intl

Sun 8/3

15:35-10:50

1 stop12h 15m

£460

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 15/4

21:25-17:55

1 stop28h 30m

Seattle/Tacoma Intl

Sun 26/4

15:40-11:55

1 stop12h 15m

£471

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

£477

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sun 3/5

13:05-20:40

1 stop15h 35m

Seattle/Tacoma Intl

Thu 21/5

23:25-20:20

1 stop12h 55m

£532

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 18/3

07:40-21:18

2 stops20h 38m

Spokane

Wed 25/3

13:37-09:40

1 stop13h 03m

£538

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 4/3

06:35-13:20

1 stop14h 45m

Seattle/Tacoma Intl

Wed 11/3

07:00-06:40

2 stops16h 40m

£549

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 14/4

08:45-22:52

2 stops22h 07m

Spokane

Tue 28/4

07:09-11:45

2 stops20h 36m

£549

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 9/4

13:05-17:55

1 stop12h 50m

Seattle/Tacoma Intl

Fri 1/5

19:00-20:20

1 stop17h 20m

£554

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 4/5

08:40-11:16

2 stops34h 36m

Spokane

Sun 10/5

16:10-09:40

1 stop33h 30m

£575

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 13/4

14:45-00:30

1 stop17h 45m

Seattle/Tacoma Intl

Mon 27/4

20:20-13:45

Nonstop9h 25m

£583

Flights are sorted by cheapest return flights first.

Deals found on 19/2

Showing 1-10 of 60 results
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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 £373). Flying from London Heathrow Airport to State of Washington in July is currently the most expensive (average of £511). 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 20 February 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 20 February 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 20 February 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
1,458 reviews
Check prices

Food

7.3

Comfort

7.6

Boarding

7.8

Overall

7.7

Crew

8.4

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
7.7
Good
1,458 reviews
KLM
7.7
Good
1,458 reviews
Check prices

Food

7.3

Comfort

7.6

Boarding

7.8

Overall

7.7

Crew

8.4

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
679 reviews
KLM
7.7
Good
1,458 reviews
Check prices

Food

7.3

Comfort

7.6

Boarding

7.8

Overall

7.7

Crew

8.4

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
1,533 reviews
KLM
7.7
Good
1,458 reviews
Check prices

Food

7.3

Comfort

7.6

Boarding

7.8

Overall

7.7

Crew

8.4

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
615 reviews
KLM
7.7
Good
1,458 reviews
Check prices

Food

7.3

Comfort

7.6

Boarding

7.8

Overall

7.7

Crew

8.4

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
7,757 reviews
KLM
7.7
Good
1,458 reviews
Check prices

Food

7.3

Comfort

7.6

Boarding

7.8

Overall

7.7

Crew

8.4

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, Lufthansa, and United Airlines can get you from London Heathrow Airport to State of Washington in just under 14h 45m. Your travel time can differ by up to 13h 40m. 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 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 (90%), Air France (90%) and Delta (90%).

  • 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 £1,727, our data indicates the cheapest price to be £395. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around £430.

  • 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 £373). Flying from London Heathrow Airport to State of Washington in July is currently the most expensive (average of £511). 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 20 February 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£334Average£533FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£340Average£462FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£416Average£669FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
United AirlinesCheapest£429Average£604FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£429Average£609FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£435Average£611FlexibilityNo cancel feeOn-time75%
Search KLM flights
FinnairCheapest£443Average£585FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Air FranceCheapest£449Average£621FlexibilityNo cancel feeOn-time77%
Search Air France flights
British AirwaysCheapest£449Average£611FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapest£462Average£496FlexibilityNo 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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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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