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Cheap flights from London Heathrow Airport to Washington from £332

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 17/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
18 Dec — 25 Dec1
1 adult
1 adult, Economy, 0 bags

Find 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 18 November 2025.

Sat 6/1212:15LHR - SEA
1 stop12h 45mIcelandair
Tue 6/114:35SEA - LHR
1 stop20h 55mIcelandair
Deal found 15/11£480
Thu 27/1112:15LHR - SEA
1 stop12h 45mIcelandair
Thu 4/1214:35SEA - LHR
1 stop12h 15mIcelandair
Deal found 15/11£481
Tue 16/1220:35LHR - SEA
1 stop28h 25mIcelandair
Thu 15/114:35SEA - LHR
1 stop12h 15mIcelandair
Deal found 17/11£482
Tue 16/1220:35LHR - SEA
1 stop28h 25mIcelandair
Wed 14/114:35SEA - LHR
1 stop20h 55mIcelandair
Deal found 15/11£482
Tue 16/1220:35LHR - SEA
1 stop28h 25mIcelandair
Mon 5/114:35SEA - LHR
1 stop12h 15mIcelandair
Deal found 17/11£483
Mon 24/1120:35LHR - SEA
1 stop28h 25mIcelandair
Sun 7/1214:35SEA - LHR
1 stop20h 55mIcelandair
Deal found 16/11£484
Tue 16/1220:35LHR - SEA
1 stop28h 25mIcelandair
Tue 23/1214:35SEA - LHR
1 stop12h 15mIcelandair
Deal found 16/11£488
Thu 27/1112:15LHR - SEA
1 stop12h 45mIcelandair
Mon 1/1214:35SEA - LHR
1 stop20h 55mIcelandair
Deal found 14/11£505
Wed 3/1220:35LHR - SEA
1 stop28h 25mIcelandair
Tue 9/1214:35SEA - LHR
1 stop20h 55mIcelandair
Deal found 16/11£507
Wed 3/1220:35LHR - SEA
1 stop28h 25mIcelandair
Sun 7/1214:35SEA - LHR
1 stop20h 55mIcelandair
Deal found 17/11£508
Thu 25/1214:45LHR - SEA
Nonstop10h 05mVirgin Atlantic
Sat 17/106:05SEA - LHR
1 stop19h 00mVirgin Atlantic
Deal found 15/11£508
Wed 3/1212:15LHR - PDX
1 stop12h 45mIcelandair
Mon 15/1214:45PDX - LHR
1 stop20h 45mIcelandair
Deal found 16/11£541

Cheap flight deals from Heathrow to Washington

Keep the following information in mind while searching for Heathrow to Washington flight deals. Data was last updated 18 November 2025.

Round-trip from

£476

One-way from

£332

Popular in

July

Cheapest in

February

Average price

£544

Good round-trip deal

£559 or less

Good one-way deal

£488 or less
British Airways
  • British Airways
  • 13/2-19/2
  • Nonstop
  • 19h 35m total
  • London to Washington
Search Deals
17/1
  • 17/1
  • 2 total stops
  • 24h 33m total
  • London to Washington
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£57 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
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 18 November 2025.
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

Tue 16/12

20:35-17:00

1 stop28h 25m

Seattle/Tacoma Intl

Thu 15/1

14:35-10:50

1 stop12h 15m

£482

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 19/2

14:55-16:55

Nonstop10h 00m

Seattle/Tacoma Intl

Thu 26/2

18:50-12:20

Nonstop9h 30m

£492

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 13/2

14:55-16:55

Nonstop10h 00m

Seattle/Tacoma Intl

Thu 19/2

18:50-12:20

Nonstop9h 30m

£492

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 27/11

12:15-17:00

1 stop12h 45m

Seattle/Tacoma Intl

Mon 1/12

14:35-19:30

1 stop20h 55m

£505

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 5/12

20:35-17:00

1 stop28h 25m

Seattle/Tacoma Intl

Mon 8/12

14:35-10:50

1 stop12h 15m

£507

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 8/4

09:50-11:35

Nonstop9h 45m

Seattle/Tacoma Intl

Wed 15/4

20:20-13:45

Nonstop9h 25m

£517

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 10/12

10:05-18:55

1 stop16h 50m

Seattle/Tacoma Intl

Thu 22/1

18:50-12:20

Nonstop9h 30m

£523

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 10/3

20:05-22:45

2 stops33h 40m

Seattle/Tacoma Intl

Tue 17/3

10:55-13:00

2 stops19h 05m

£524

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 2/12

11:45-11:50

1 stop32h 05m

Seattle/Tacoma Intl

Mon 8/12

19:20-12:50

Nonstop9h 30m

£530

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 6/5

06:30-14:16

2 stops15h 46m

Seattle/Tacoma Intl

Thu 14/5

09:02-10:10

2 stops17h 08m

£537

Flights are sorted by cheapest return flights first.

Deals found on 16/11

Showing 1-10 of 56 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 £384). 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 18 November 2025.

It’s typically best to fly out from London Heathrow Airport to State of Washington in the evening. Doing so could potentially save you 23% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from London Heathrow Airport to State of Washington?

Use this chart to determine the cheapest time to fly return from Heathrow to Washington. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their London Heathrow Airport to State of Washington flight should consider departing on Monday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 18 November 2025.

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).

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 18 November 2025.
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
1,411 reviews
Check prices

Food

7.3

Entertainment

7.1

Boarding

7.8

Comfort

7.7

Crew

8.4

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,411 reviews
KLM
7.7
Good
1,411 reviews
Check prices

Food

7.3

Entertainment

7.1

Boarding

7.8

Comfort

7.7

Crew

8.4

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Virgin Atlantic
7.5
Good
673 reviews
KLM
7.7
Good
1,411 reviews
Check prices

Food

7.3

Entertainment

7.1

Boarding

7.8

Comfort

7.7

Crew

8.4

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Air France
7.4
Good
1,493 reviews
KLM
7.7
Good
1,411 reviews
Check prices

Food

7.3

Entertainment

7.1

Boarding

7.8

Comfort

7.7

Crew

8.4

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Icelandair
7.0
Good
580 reviews
KLM
7.7
Good
1,411 reviews
Check prices

Food

7.3

Entertainment

7.1

Boarding

7.8

Comfort

7.7

Crew

8.4

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
British Airways
6.7
Okay
7,528 reviews
KLM
7.7
Good
1,411 reviews
Check prices

Food

7.3

Entertainment

7.1

Boarding

7.8

Comfort

7.7

Crew

8.4

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

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, Finnair, and United Airlines can get you from London Heathrow Airport to State of Washington in just under 10h. Your travel time can differ by up to 18h 25m. 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 £397 on British Airways. Other airlines that offer cheap prices include Lufthansa from £425 and WestJet from £433 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 Scandinavian Airlines (95%), Air France (86%) and KLM (85%).

  • 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 £1,555, our data indicates the cheapest price to be £421. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around £370.

  • 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 £384). 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 18 November 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£363Average£485FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air FranceCheapest£393Average£611FlexibilityNo cancel feeOn-time77%
Search Air France flights
FinnairCheapest£406Average£576FlexibilityNo cancel feeOn-time76%
Search Finnair flights
LufthansaCheapest£407Average£571FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
KLMCheapest£411Average£614FlexibilityNo cancel feeOn-time75%
Search KLM flights
United AirlinesCheapest£413Average£628FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£449Average£615FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£451Average£675FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
DeltaCheapest£454Average£607FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Aer LingusCheapest£466Average£678FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

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

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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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