Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Washington from £331

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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
1 May — 8 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 1 April 2026.

Thu 23/413:05
LHR
-
SEA
1 stop12h 50m
Icelandair
Sun 3/515:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 27/3£446
Tue 21/413:05
LHR
-
SEA
1 stop15h 35m
Icelandair
Sun 3/515:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 27/3£446
Fri 22/509:50
LHR
-
SEA
Nonstop9h 45m
British Airways
Wed 24/613:30
SEA
-
LHR
Nonstop9h 15m
British Airways
Deal found 29/3£456
Wed 22/413:05
LHR
-
SEA
1 stop15h 35m
Icelandair
Tue 5/515:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 27/3£458
Thu 1/1016:30
LHR
-
SEA
Nonstop9h 55m
British Airways
Mon 12/1020:20
SEA
-
LHR
Nonstop9h 25m
British Airways
Deal found 30/3£465
Tue 21/409:50
LHR
-
SEA
Nonstop9h 45m
British Airways
Mon 4/513:30
SEA
-
LHR
Nonstop9h 15m
British Airways
Deal found 27/3£466
Tue 21/413:05
LHR
-
SEA
1 stop15h 35m
Icelandair
Sat 9/515:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 27/3£470
Wed 22/413:05
LHR
-
SEA
1 stop15h 35m
Icelandair
Fri 8/515:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 27/3£477
Mon 13/421:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Sun 26/415:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 30/3£480
Wed 22/409:50
LHR
-
SEA
Nonstop9h 45m
British Airways
Tue 5/520:20
SEA
-
LHR
Nonstop9h 25m
British Airways
Deal found 27/3£484
Sat 16/521:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Mon 3/823:25
SEA
-
LHR
1 stop28h 30m
Icelandair
Deal found 31/3£486
Thu 16/413:05
LHR
-
SEA
1 stop12h 50m
Icelandair
Fri 24/419:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Deal found 27/3£486

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 1 April 2026.

Round-trip from

£446

One-way from

£331

Popular in

July

Cheapest in

February

Average price

£531

Good round-trip deal

£664 or less

Good one-way deal

£507 or less
Icelandair
  • Icelandair
  • 23/4-3/5
  • 2 total stops
  • 25h 05m total
  • London to Washington
Search Deals
WestJet
  • WestJet
  • 12/4
  • 1 total stop
  • 32h 09m total
  • London to Washington
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£58 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 1 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

Thu 14/5

06:30-11:42

1 stop13h 12m

Seattle/Tacoma Intl

Thu 28/5

20:10-14:00

Nonstop9h 50m

£586

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 14/5

09:55-16:30

1 stop14h 35m

Seattle/Tacoma Intl

Tue 2/6

22:05-15:35

Nonstop9h 30m

£586

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 25/8

06:15-20:02

2 stops21h 47m

Seattle/Tacoma Intl

Sun 6/9

13:32-08:05

1 stop34h 33m

£612

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

£613

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 16/5

11:40-14:00

Nonstop10h 20m

Seattle/Tacoma Intl

Thu 28/5

20:10-14:00

Nonstop9h 50m

£620

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 9/7

06:30-11:33

1 stop13h 03m

Seattle/Tacoma Intl

Tue 21/7

17:51-17:30

1 stop15h 39m

£635

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 3/9

19:30-13:45

1 stop26h 15m

Seattle/Tacoma Intl

Thu 17/9

09:50-16:00

2 stops22h 10m

£637

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sun 17/5

06:30-16:30

1 stop18h 00m

Seattle/Tacoma Intl

Fri 29/5

21:45-15:35

Nonstop9h 50m

£637

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 20/8

06:30-11:37

1 stop13h 07m

Seattle/Tacoma Intl

Sat 5/9

18:20-12:10

Nonstop9h 50m

£638

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 15/5

06:40-22:40

2 stops24h 00m

Seattle/Tacoma Intl

Tue 15/9

15:55-21:35

2 stops21h 40m

£641

Flights are sorted by cheapest return flights first.

Deals found on 27/3

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
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 £374). Flying from London Heathrow Airport to State of Washington in July is currently the most expensive (average of £521). 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 1 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 1 April 2026.

The most flights from LHR to USWA are scheduled on a Monday (21 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (10 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 1 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
7.8
Good
1,481 reviews
Check prices

Food

7.3

Entertainment

7.1

Crew

8.4

Comfort

7.6

Boarding

7.8

Overall

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
1,481 reviews
KLM
7.8
Good
1,481 reviews
Check prices

Food

7.3

Entertainment

7.1

Crew

8.4

Comfort

7.6

Boarding

7.8

Overall

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
685 reviews
KLM
7.8
Good
1,481 reviews
Check prices

Food

7.3

Entertainment

7.1

Crew

8.4

Comfort

7.6

Boarding

7.8

Overall

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
1,559 reviews
KLM
7.8
Good
1,481 reviews
Check prices

Food

7.3

Entertainment

7.1

Crew

8.4

Comfort

7.6

Boarding

7.8

Overall

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
7.0
Good
630 reviews
KLM
7.8
Good
1,481 reviews
Check prices

Food

7.3

Entertainment

7.1

Crew

8.4

Comfort

7.6

Boarding

7.8

Overall

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
7,841 reviews
KLM
7.8
Good
1,481 reviews
Check prices

Food

7.3

Entertainment

7.1

Crew

8.4

Comfort

7.6

Boarding

7.8

Overall

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?

    Delta, British Airways, and United Airlines can get you from London Heathrow Airport to State of Washington in just under 13h 12m. Your travel time can differ by up to 8h 35m. 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 - 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 (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 £1,754, our data indicates the cheapest price to be £421. 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 £374). Flying from London Heathrow Airport to State of Washington in July is currently the most expensive (average of £521). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Heathrow to Washington

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to John F Kennedy Intl flights
Heathrow to Newark flights
Gatwick to John F Kennedy Intl flights
Heathrow to LaGuardia flights
Stansted to John F Kennedy Intl flights
Gatwick to Newark flights
London City to John F Kennedy Intl flights
Heathrow to Los Angeles flights
Gatwick to LaGuardia flights
Heathrow to Orlando flights
Luton to John F Kennedy Intl flights
Stansted to Newark flights
Heathrow to Miami flights
Luton to Newark flights
Heathrow to Boston flights
London City to Newark flights
Heathrow to O'Hare Intl flights
Heathrow to Dallas/Fort Worth flights
Heathrow to Las Vegas flights
Heathrow to San Francisco flights
Gatwick to Los Angeles flights
Heathrow to Dulles Intl flights
Stansted to Los Angeles flights
Gatwick to Orlando flights
Gatwick to Boston flights
Heathrow to Hobby flights
London City to Los Angeles flights
Heathrow to Atlanta flights
Heathrow to Seattle flights
Gatwick to Miami flights
Stansted to Orlando flights
Stansted to Miami flights
Heathrow to Baltimore flights
Luton to Los Angeles flights
Heathrow to George Bush Intcntl flights
Heathrow to Ontario flights
London City to Miami flights
Stansted to LaGuardia flights
London City to Boston flights
Stansted to Boston flights
Heathrow to Tampa flights
Gatwick to San Francisco flights
London City to Orlando flights
Stansted to San Francisco flights
Luton to Miami flights
Heathrow to Denver flights
London City to San Francisco flights
Heathrow to Santa Ana flights
Gatwick to Las Vegas flights
Heathrow to Nashville flights

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 1 April 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£340Average£550FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£346Average£469FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
IberiaCheapest£412Average£662FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Aer LingusCheapest£424Average£682FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Virgin AtlanticCheapest£434Average£624FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
United AirlinesCheapest£437Average£621FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
KLMCheapest£448Average£642FlexibilityNo cancel feeOn-time75%
Search KLM flights
British AirwaysCheapest£456Average£638FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air FranceCheapest£457Average£648FlexibilityNo cancel feeOn-time77%
Search Air France flights
FinnairCheapest£468Average£654FlexibilityNo cancel feeOn-time76%
Search Finnair flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Washington from Heathrow today with Cheapflights!

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.