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Cheap flights from London Heathrow Airport to Washington from £341

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 26/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
7 May — 14 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 7 April 2026.

Wed 29/417:45
LHR
-
SEA
Nonstop10h 19m
Delta
Tue 5/512:10
SEA
-
LHR
1 stop16h 55m
Delta
Deal found 2/4£470
Mon 27/414:45
LHR
-
SEA
1 stop17h 51m
American Airlines
Mon 4/511:16
SEA
-
LHR
1 stop15h 14m
American Airlines
Deal found 2/4£472
Mon 27/412:25
LHR
-
SEA
1 stop16h 14m
Delta
Tue 5/515:35
SEA
-
LHR
1 stop13h 30m
Delta
Deal found 2/4£473
Tue 19/521:25
LHR
-
SEA
1 stop28h 30m
Icelandair
Fri 5/623:25
SEA
-
LHR
1 stop28h 30m
Icelandair
Deal found 5/4£484
Sat 16/521:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Sun 2/819:00
SEA
-
LHR
1 stop32h 55m
Icelandair
Deal found 4/4£485
Thu 1/1021:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Thu 15/1015:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 6/4£488
Thu 23/413:05
LHR
-
SEA
1 stop15h 35m
Icelandair
Mon 27/415:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 4/4£489
Wed 28/1020:35
LHR
-
SEA
1 stop28h 25m
Icelandair
Wed 4/1114:35
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 5/4£490
Thu 1/1021:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Tue 6/1019:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Deal found 6/4£490
Thu 8/1013:05
LHR
-
SEA
1 stop12h 50m
Icelandair
Tue 13/1015:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 2/4£491
Mon 5/1021:25
LHR
-
SEA
1 stop28h 30m
Icelandair
Fri 9/1015:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 3/4£492
Tue 1/921:25
LHR
-
PDX
1 stop28h 30m
Icelandair
Wed 30/915:30
PDX
-
LHR
1 stop20h 50m
Icelandair
Deal found 6/4£544

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 7 April 2026.

Round-trip from

£470

One-way from

£341

Popular in

July

Cheapest in

February

Average price

£545

Good round-trip deal

£662 or less

Good one-way deal

£542 or less
Delta
  • Delta
  • 29/4-5/5
  • 1 total stop
  • 27h 14m total
  • London to Washington
Search Deals
WestJet
  • WestJet
  • 26/4
  • 1 total stop
  • 31h 40m total
  • London to Washington
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£54 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 April 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 7 April 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

Fri 12/6

06:30-11:37

1 stop13h 07m

Seattle/Tacoma Intl

Mon 22/6

22:05-15:35

Nonstop9h 30m

£567

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 11/6

17:45-20:01

Nonstop10h 16m

Seattle/Tacoma Intl

Tue 16/6

08:50-07:55

1 stop15h 05m

£583

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 28/5

19:30-13:45

1 stop26h 15m

Seattle/Tacoma Intl

Sat 6/6

15:55-16:25

2 stops16h 30m

£601

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 12/8

06:30-11:37

1 stop13h 07m

Seattle/Tacoma Intl

Wed 26/8

18:20-12:10

Nonstop9h 50m

£602

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 28/5

19:50-13:45

2 stops25h 55m

Seattle/Tacoma Intl

Tue 2/6

15:55-17:00

2 stops17h 05m

£607

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 21/5

11:45-16:30

1 stop12h 45m

Seattle/Tacoma Intl

Thu 28/5

20:10-14:00

Nonstop9h 50m

£609

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 5/5

08:40-16:30

1 stop15h 50m

Seattle/Tacoma Intl

Tue 12/5

18:20-12:10

Nonstop9h 50m

£609

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 25/5

08:40-16:30

1 stop15h 50m

Seattle/Tacoma Intl

Mon 1/6

07:15-10:40

1 stop19h 25m

£610

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 18/5

06:30-11:42

1 stop13h 12m

Seattle/Tacoma Intl

Mon 1/6

07:15-06:20

1 stop15h 05m

£610

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 13/5

06:30-16:30

1 stop18h 00m

Seattle/Tacoma Intl

Thu 21/5

21:45-15:35

Nonstop9h 50m

£613

Flights are sorted by cheapest return flights first.

Deals found on 4/4

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 £372). Flying from London Heathrow Airport to State of Washington in July is currently the most expensive (average of £519). 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 7 April 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 7 April 2026.

The most flights from LHR to USWA are scheduled on a Monday (21 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (15 on average).

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 7 April 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
1,491 reviews
Check prices

Comfort

7.6

Overall

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

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
7.7
Good
1,491 reviews
KLM
7.7
Good
1,491 reviews
Check prices

Comfort

7.6

Overall

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

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
7.7
Good
1,491 reviews
Check prices

Comfort

7.6

Overall

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

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
1,563 reviews
KLM
7.7
Good
1,491 reviews
Check prices

Comfort

7.6

Overall

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

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
631 reviews
KLM
7.7
Good
1,491 reviews
Check prices

Comfort

7.6

Overall

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

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
7,857 reviews
KLM
7.7
Good
1,491 reviews
Check prices

Comfort

7.6

Overall

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

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?

    Delta, Scandinavian Airlines, and KLM can get you from London Heathrow Airport to State of Washington in just under 13h 07m. Your travel time can differ by up to 13h 08m. 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 £358 on Icelandair. Other airlines that offer cheap prices include British Airways from £376 and Aer Lingus from £392 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 (96%), Delta (94%) and Virgin Atlantic (94%).

  • 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 £1,795, our data indicates the cheapest price to be £420. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around £490.

  • 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 £519). 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 7 April 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£339Average£549FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£346Average£470FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£423Average£681FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Virgin AtlanticCheapest£433Average£625FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
United AirlinesCheapest£437Average£620FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
KLMCheapest£448Average£644FlexibilityNo cancel feeOn-time75%
Search KLM flights
British AirwaysCheapest£455Average£636FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air FranceCheapest£457Average£654FlexibilityNo cancel feeOn-time77%
Search Air France flights
FinnairCheapest£468Average£680FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Air CanadaCheapest£470Average£505FlexibilityNo 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?

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