Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Washington from £310

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
28 Mar — 4 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 26 February 2026.

Fri 12/606:40
LHR
-
SEA
1 stop15h 05m
Scandinavian Airlines
Sat 5/915:55
SEA
-
LHR
1 stop16h 05m
Scandinavian Airlines
Deal found 24/2£371
Mon 18/513:05
LHR
-
SEA
1 stop15h 35m
Icelandair
Fri 22/523:25
SEA
-
LHR
1 stop12h 55m
Icelandair
Deal found 24/2£381
Sat 7/313:45
LHR
-
SEA
1 stop28h 55m
United Airlines
Mon 9/307:00
SEA
-
LHR
1 stop15h 55m
United Airlines
Deal found 23/2£385
Fri 12/606:40
LHR
-
SEA
1 stop15h 05m
Scandinavian Airlines
Fri 4/915:55
SEA
-
LHR
1 stop13h 40m
Scandinavian Airlines
Deal found 24/2£395
Mon 13/421:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Mon 27/415:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 25/2£419
Mon 9/310:25
LHR
-
SEA
1 stop19h 20m
United Airlines
Tue 17/312:36
SEA
-
LHR
1 stop16h 24m
United Airlines
Deal found 23/2£424
Thu 5/312:15
LHR
-
SEA
1 stop12h 45m
Icelandair
Tue 10/315:35
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 25/2£424
Fri 6/320:35
LHR
-
SEA
1 stop28h 25m
Icelandair
Tue 10/315:35
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 23/2£425
Tue 14/421:25
LHR
-
SEA
1 stop28h 30m
Icelandair
Tue 21/415:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 23/2£437
Tue 22/910:15
LHR
-
PDX
2 stops40h 51m
Air Canada
Sat 3/1019:44
PDX
-
LHR
2 stops33h 36m
Air Canada
Deal found 22/2£525
Mon 28/921:25
LHR
-
PDX
1 stop28h 30m
Icelandair
Wed 7/1015:30
PDX
-
LHR
1 stop12h 25m
Icelandair
Deal found 23/2£542
Tue 21/421:25
LHR
-
PDX
1 stop28h 35m
Icelandair
Tue 19/515:30
PDX
-
LHR
1 stop12h 25m
Icelandair
Deal found 23/2£543

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 26 February 2026.

Round-trip from

£371

One-way from

£310

Popular in

July

Cheapest in

February

Average price

£480

Good round-trip deal

£493 or less

Good one-way deal

£470 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 12/6-5/9
  • 2 total stops
  • 31h 10m total
  • London to Washington
Search Deals
12/4
  • 12/4
  • 3 total stops
  • 43h 27m 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 (£9 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 26 February 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

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

£473

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 24/8

19:50-13:45

2 stops25h 55m

Seattle/Tacoma Intl

Tue 1/9

15:55-18:50

2 stops18h 55m

£528

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 22/4

09:00-16:59

1 stop15h 59m

Seattle/Tacoma Intl

Wed 29/4

10:48-10:40

2 stops15h 52m

£534

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 17/6

09:00-16:59

1 stop15h 59m

Seattle/Tacoma Intl

Wed 9/9

08:00-06:55

1 stop14h 55m

£571

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 20/5

06:40-20:50

2 stops22h 10m

Seattle/Tacoma Intl

Sat 6/6

15:55-17:40

1 stop17h 45m

£576

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 16/4

07:25-21:35

2 stops22h 10m

Spokane

Wed 22/4

07:10-06:55

2 stops15h 45m

£598

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 23/4

14:50-21:11

1 stop14h 21m

Spokane

Mon 27/4

12:35-11:10

1 stop14h 35m

£606

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 23/4

07:25-21:35

2 stops22h 10m

Spokane

Mon 27/4

05:05-10:00

2 stops20h 55m

£607

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 19/5

07:25-19:00

2 stops19h 35m

Seattle/Tacoma Intl

Mon 1/6

07:30-05:55

1 stop14h 25m

£610

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sun 12/4

14:50-21:06

1 stop14h 16m

Seattle/Tacoma Intl

Sat 18/4

15:48-20:40

2 stops20h 52m

£621

Flights are sorted by cheapest return flights first.

Deals found on 24/2

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, January is the cheapest month in which you can book a flight from London Heathrow Airport to State of Washington (average of £371). Flying from London Heathrow Airport to State of Washington in July is currently the most expensive (average of £509). 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 26 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 26 February 2026.

The most flights from LHR to USWA are scheduled on a Monday (15 on average). You will have fewer flight options on Tuesday, 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 26 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
1,460 reviews
Check prices

Entertainment

7.1

Crew

8.4

Boarding

7.8

Food

7.3

Comfort

7.6

Overall

7.7

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
1,460 reviews
KLM
7.7
Good
1,460 reviews
Check prices

Entertainment

7.1

Crew

8.4

Boarding

7.8

Food

7.3

Comfort

7.6

Overall

7.7

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
1,460 reviews
Check prices

Entertainment

7.1

Crew

8.4

Boarding

7.8

Food

7.3

Comfort

7.6

Overall

7.7

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
1,538 reviews
KLM
7.7
Good
1,460 reviews
Check prices

Entertainment

7.1

Crew

8.4

Boarding

7.8

Food

7.3

Comfort

7.6

Overall

7.7

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
617 reviews
KLM
7.7
Good
1,460 reviews
Check prices

Entertainment

7.1

Crew

8.4

Boarding

7.8

Food

7.3

Comfort

7.6

Overall

7.7

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
7,771 reviews
KLM
7.7
Good
1,460 reviews
Check prices

Entertainment

7.1

Crew

8.4

Boarding

7.8

Food

7.3

Comfort

7.6

Overall

7.7

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, Scandinavian Airlines, and United Airlines can get you from London Heathrow Airport to State of Washington in just under 15h 59m. Your travel time can differ by up to 15h 16m. 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 £350 on Icelandair. Other airlines that offer cheap prices include British Airways from £367 and Aer Lingus from £384 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 (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 £1,767, our data indicates the cheapest price to be £396. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around £381.

  • 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 £371). Flying from London Heathrow Airport to State of Washington in July is currently the most expensive (average of £509). 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
Heathrow to LaGuardia flights
Gatwick to John F Kennedy Intl flights
London City to John F Kennedy Intl flights
Gatwick to Newark flights
Heathrow to Los Angeles flights
Heathrow to Orlando flights
Stansted to John F Kennedy Intl flights
Heathrow to Miami flights
Gatwick to LaGuardia flights
Heathrow to Boston flights
Stansted to Newark flights
Luton to John F Kennedy Intl flights
Luton to Newark flights
London City to Newark flights
Heathrow to Las Vegas flights
Heathrow to O'Hare Intl flights
Heathrow to Dallas/Fort Worth flights
Heathrow to San Francisco flights
Heathrow to Dulles Intl flights
Gatwick to Orlando flights
Gatwick to Boston flights
Heathrow to Seattle flights
Heathrow to Atlanta flights
Gatwick to Los Angeles flights
Heathrow to Hobby flights
Gatwick to Miami flights
Heathrow to Baltimore flights
Stansted to Los Angeles flights
London City to Los Angeles flights
Heathrow to Tampa flights
Stansted to Miami flights
London City to Miami flights
Stansted to Orlando flights
Heathrow to Nashville flights
Heathrow to George Bush Intcntl flights
Stansted to Boston flights
London City to Boston flights
Luton to Los Angeles flights
London City to Orlando flights
Heathrow to Ontario flights
Gatwick to Dulles Intl flights
Heathrow to Detroit flights
Heathrow to Denver flights
Gatwick to Las Vegas flights
Heathrow to Reagan-National flights
Luton to Miami flights
Heathrow to Midway flights
London City to Dulles Intl 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 26 February 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£333Average£533FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£338Average£457FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£414Average£666FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
United AirlinesCheapest£419Average£599FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£427Average£607FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£438Average£613FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air FranceCheapest£447Average£626FlexibilityNo cancel feeOn-time77%
Search Air France flights
British AirwaysCheapest£448Average£609FlexibilityNo cancel feeOn-time70%
Search British Airways flights
FinnairCheapest£454Average£591FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Air CanadaCheapest£460Average£494FlexibilityNo cancel feeOn-time67%
Search Air Canada 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.