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Cheap flights from London Heathrow Airport to Washington from £325

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
15 Apr — 22 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 16 March 2026.

Mon 27/415:05
LHR
-
SEA
1 stop12h 15m
Air Canada
Mon 4/514:55
SEA
-
LHR
1 stop14h 25m
Air Canada
Deal found 11/3£445
Sat 25/421:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Sat 2/519:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Deal found 11/3£468
Thu 24/909:50
LHR
-
SEA
Nonstop9h 45m
British Airways
Thu 8/1020:20
SEA
-
LHR
Nonstop9h 25m
British Airways
Deal found 12/3£473
Mon 13/421:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Mon 27/415:40
SEA
-
LHR
1 stop20h 40m
Icelandair
Deal found 11/3£478
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£480
Thu 17/916:30
LHR
-
SEA
Nonstop9h 55m
British Airways
Tue 29/920:20
SEA
-
LHR
Nonstop9h 25m
British Airways
Deal found 14/3£481
Mon 20/421:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Tue 5/519:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Deal found 14/3£486
Tue 21/413:05
LHR
-
SEA
1 stop15h 35m
Icelandair
Fri 1/519:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Deal found 13/3£488
Fri 22/507:05
LHR
-
SEA
2 stops38h 40m
Scandinavian Airlines
Tue 26/515:55
SEA
-
LHR
1 stop17h 45m
Scandinavian Airlines
Deal found 11/3£489
Sat 30/506:40
LHR
-
SEA
1 stop15h 05m
Scandinavian Airlines
Sun 7/615:55
SEA
-
LHR
1 stop21h 45m
Scandinavian Airlines
Deal found 11/3£490
Mon 13/421:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Mon 20/415:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 15/3£492
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£496

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 16 March 2026.

Round-trip from

£423

One-way from

£325

Popular in

July

Cheapest in

February

Average price

£546

Good round-trip deal

£660 or less

Good one-way deal

£496 or less
Icelandair
  • Icelandair
  • 13/4-27/4
  • 2 total stops
  • 48h 35m 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 (£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 16 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

£519

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 25/8

07:25-18:29

2 stops19h 04m

Seattle/Tacoma Intl

Mon 7/9

23:00-21:35

1 stop14h 35m

£615

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 4/9

10:50-16:59

1 stop14h 09m

Seattle/Tacoma Intl

Mon 7/9

23:10-06:55

1 stop23h 45m

£615

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

£617

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

£620

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

£620

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

£621

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Mon 4/5

07:30-19:05

2 stops19h 35m

Portland

Mon 18/5

10:10-13:20

1 stop19h 10m

£624

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 4/5

08:40-21:40

2 stops21h 00m

Spokane

Sun 10/5

16:10-09:40

1 stop33h 30m

£625

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sun 31/5

19:30-19:55

2 stops32h 25m

Seattle/Tacoma Intl

Sun 14/6

15:55-18:50

2 stops18h 55m

£630

Flights are sorted by cheapest return flights first.

Deals found on 11/3

Showing 1-10 of 58 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 £373). Flying from London Heathrow Airport to State of Washington in July is currently the most expensive (average of £520). 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 16 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 16 March 2026.

The most flights from LHR to USWA are scheduled on a Saturday (21 on average). You will have fewer flight options on Monday, 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 16 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
1,471 reviews
Check prices

Crew

8.4

Comfort

7.6

Food

7.3

Overall

7.8

Entertainment

7.1

Boarding

7.8

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
1,471 reviews
KLM
7.8
Good
1,471 reviews
Check prices

Crew

8.4

Comfort

7.6

Food

7.3

Overall

7.8

Entertainment

7.1

Boarding

7.8

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
7.8
Good
1,471 reviews
Check prices

Crew

8.4

Comfort

7.6

Food

7.3

Overall

7.8

Entertainment

7.1

Boarding

7.8

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
1,471 reviews
Check prices

Crew

8.4

Comfort

7.6

Food

7.3

Overall

7.8

Entertainment

7.1

Boarding

7.8

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
1,471 reviews
Check prices

Crew

8.4

Comfort

7.6

Food

7.3

Overall

7.8

Entertainment

7.1

Boarding

7.8

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
7,792 reviews
KLM
7.8
Good
1,471 reviews
Check prices

Crew

8.4

Comfort

7.6

Food

7.3

Overall

7.8

Entertainment

7.1

Boarding

7.8

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 Air Canada can get you from London Heathrow Airport to State of Washington in just under 12h. Your travel time can differ by up to 22h 50m. The distance from London Heathrow Airport to State of Washington is about 4896 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 £359 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 - 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 £1,807, our data indicates the cheapest price to be £422. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around £480.

  • 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 £373). Flying from London Heathrow Airport to State of Washington in July is currently the most expensive (average of £520). 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 16 March 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£339Average£549FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£346Average£465FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
IberiaCheapest£412Average£661FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Aer LingusCheapest£423Average£682FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
United AirlinesCheapest£428Average£616FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£434Average£622FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£448Average£631FlexibilityNo cancel feeOn-time75%
Search KLM flights
British AirwaysCheapest£456Average£629FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air FranceCheapest£457Average£652FlexibilityNo cancel feeOn-time77%
Search Air France 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.

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