Find flights
Deals
When to book
FAQs

Cheap flights from Washington to London Heathrow Airport from £216

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 1/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LHR
28 Nov — 5 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Washington to Heathrow

Keep the following information in mind while searching for Washington to Heathrow flight deals. Data was last updated 29 October 2025.

Round-trip from

£389

One-way from

£216

Popular in

June

Cheapest in

October

Average price

£498

Good round-trip deal

£490 or less

Good one-way deal

£461 or less
Icelandair
  • Icelandair
  • 22/3-31/3
  • 2 total stops
  • 40h 40m total
  • Washington to London
Search Deals
1/3
  • 1/3
  • 3 total stops
  • 33h 50m total
  • Washington to London
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£76 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£13 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from Washington to London Heathrow.
Search Deals
Price to beat on a one-way flight from Washington to London Heathrow.
Search Deals

Find flight deals from Washington to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Washington to Heathrow
Explore the most affordable flight options available from Washington to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 October 2025.

Tue 4/1114:35SEA - LHR
1 stop20h 55mIcelandair
Tue 11/1120:35LHR - SEA
1 stop28h 25mIcelandair
Deal found 28/10£390
Tue 2/1214:35SEA - LHR
1 stop12h 15mIcelandair
Tue 9/1212:15LHR - SEA
1 stop12h 45mIcelandair
Deal found 28/10£391
Tue 11/1114:35SEA - LHR
1 stop12h 15mIcelandair
Mon 17/1120:35LHR - SEA
1 stop28h 25mIcelandair
Deal found 27/10£391
Thu 27/1114:35SEA - LHR
1 stop12h 15mIcelandair
Mon 8/1220:35LHR - SEA
1 stop28h 25mIcelandair
Deal found 29/10£392
Sun 9/1114:35SEA - LHR
1 stop20h 55mIcelandair
Tue 25/1112:15LHR - SEA
1 stop12h 45mIcelandair
Deal found 27/10£406
Tue 4/1114:45PDX - LHR
1 stop20h 45mIcelandair
Mon 17/1112:15LHR - PDX
1 stop12h 45mIcelandair
Deal found 27/10£409
Tue 4/1114:35SEA - LHR
1 stop20h 55mIcelandair
Fri 14/1112:15LHR - SEA
1 stop12h 45mIcelandair
Deal found 28/10£409
Thu 27/1114:35SEA - LHR
1 stop12h 15mIcelandair
Tue 2/1220:35LHR - SEA
1 stop28h 25mIcelandair
Deal found 28/10£410
Thu 11/1214:45PDX - LHR
1 stop20h 45mIcelandair
Thu 18/1220:35LHR - PDX
1 stop28h 25mIcelandair
Deal found 27/10£413
Sun 30/1120:05SEA - LHR
1 stop11h 30mAer Lingus
Fri 5/1208:50LHR - SEA
1 stop17h 30mAer Lingus
Deal found 27/10£416
Wed 5/1115:55SEA - LHR
1 stop14h 30mAer Lingus
Fri 7/1108:50LHR - SEA
1 stop17h 30mAer Lingus
Deal found 28/10£417
Wed 12/1114:35SEA - LHR
1 stop20h 55mIcelandair
Thu 20/1112:15LHR - SEA
1 stop12h 45mIcelandair
Deal found 29/10£418

Cheapflights Fare Finder

 
Customise your flight search to find flights from Washington to Heathrow 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 29 October 2025.
Use the filters below to find and compare flights from Washington to London Heathrow Airport that are best for you.

Fly from

Washington

Fly to

Heathrow

Route

Depart

Return

Price

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 2/12

19:20-12:50

Nonstop9h 30m

London Heathrow

Thu 11/12

06:20-11:25

1 stop13h 05m

£434

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 12/11

16:48-10:30

Nonstop9h 42m

London Heathrow

Mon 17/11

08:40-11:45

1 stop35h 05m

£434

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 10/12

09:30-10:00

1 stop16h 30m

London Heathrow

Thu 25/12

06:30-11:50

1 stop13h 20m

£438

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 29/12

16:48-10:30

Nonstop9h 42m

London Heathrow

Fri 20/2

12:20-14:45

Nonstop10h 25m

£439

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 18/2

16:55-10:30

Nonstop9h 35m

London Heathrow

Fri 27/2

06:20-13:20

1 stop15h 00m

£440

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 17/11

16:48-10:30

Nonstop9h 42m

London Heathrow

Mon 24/11

17:35-11:25

1 stop25h 50m

£443

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 28/1

13:30-10:30

1 stop13h 00m

London Heathrow

Wed 11/2

06:30-11:25

1 stop12h 55m

£444

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 19/11

07:15-10:30

1 stop19h 15m

London Heathrow

Thu 4/12

06:20-16:08

2 stops17h 48m

£444

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 12/11

13:16-11:40

1 stop14h 24m

London Heathrow

Tue 25/11

06:20-15:48

2 stops17h 28m

£445

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 22/1

10:30-17:40

3 stops23h 10m

London Heathrow

Fri 20/2

06:40-22:22

2 stops23h 42m

£446

Flights are sorted by cheapest return flights first.

Deals found on 27/10

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Washington to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Washington 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 Washington to London Heathrow Airport

What is the cheapest month to book a flight from State of Washington to London Heathrow Airport?

Currently, November is the cheapest month in which you can book a flight from State of Washington to London Heathrow Airport (average of £366). Flying from State of Washington to London Heathrow Airport in June is currently the most expensive (average of £595). 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 WA to LHR?

Find hourly flight availability from Washington to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 October 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 20% on flights from State of Washington to London Heathrow Airport by exploring options for tickets in the afternoon.

Related info for your journey

Find useful and relevant information for your journey from Washington to Heathrow. 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 State of Washington to London Heathrow Airport?

    Airlines like Delta, KLM, and Scandinavian Airlines fly from State of Washington to London Heathrow Airport in about 9h 30m. The time it takes to get you to your destination can typically vary by up to 13h 40m. State of Washington and London Heathrow Airport are separated by a distance of 4783 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines to fly from State of Washington to London Heathrow Airport one-way?

    One-way options have recently been found by users for as low as £255 on Icelandair. Other airlines that offer cheap prices include Scandinavian Airlines from £258 and United Airlines from £296 one-way.

  • What are the most popular routes from State of Washington to London Heathrow Airport?

    When deciding which route to take from State of Washington to London Heathrow Airport consider Seattle/Tacoma Intl - London Heathrow, Portland - London Heathrow or Spokane - London Heathrow as they are the most popular.

  • What are the most reliable airlines from State of Washington to London Heathrow Airport?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from State of Washington to London Heathrow Airport on time: KLM (86%), Air France (86%), Delta (86%).

  • What are the cheapest flights from State of Washington to London Heathrow Airport?

    The cheapest flight price from State of Washington to London Heathrow Airport is £393. On average you can expect to pay £523. The most popular route, (Seattle/Tacoma Intl - London Heathrow), can usually be booked for £331.

  • Can I find deals for flights from Washington to Heathrow that include hotel bookings?

    Yes. In addition to deals on Washington to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Washington to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Heathrow.

  • Can I find deals for business class flights from Washington to Heathrow?

    Yes. Cheapflights offers flight deals from Washington to Heathrow 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 State of Washington to London Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from State of Washington to London Heathrow Airport (average of £366). Flying from State of Washington to London Heathrow Airport in June is currently the most expensive (average of £595). 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

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Croydon
Slough
Gatwick
Hounslow
Northampton
Luton
Ilford
Wembley
Deal
Hayes
Colchester
Watford
Winchester
Chichester
Swindon
Crawley
Romford
Brentford
Ipswich

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 Washington to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Heathrow flights
Newark to Heathrow flights
John F Kennedy Intl to Gatwick flights
Newark to Gatwick flights
Boston to Heathrow flights
Dulles Intl to Heathrow flights
John F Kennedy Intl to London City flights
LaGuardia to Heathrow flights
Los Angeles to Heathrow flights
John F Kennedy Intl to Stansted flights
San Francisco to Heathrow flights
Newark to London City flights
Baltimore to Heathrow flights
O'Hare Intl to Heathrow flights
LaGuardia to Gatwick flights
Dallas/Fort Worth to Heathrow flights
Newark to Luton flights
Seattle to Heathrow flights
Newark to Stansted flights
Boston to Gatwick flights
Dulles Intl to Gatwick flights
Miami to Heathrow flights
Atlanta to Heathrow flights
Boston to London City flights
Reagan-National to Heathrow flights
Los Angeles to Gatwick flights
Dulles Intl to London City flights
Orlando to Heathrow flights
Philadelphia to Heathrow flights
Baltimore to Gatwick flights
Los Angeles to London City flights
Hobby to Heathrow flights
Denver to Heathrow flights
Boston to Stansted flights
San Francisco to Gatwick flights
O'Hare Intl to Gatwick flights
Boston to Luton flights
Reagan-National to Gatwick flights
O'Hare Intl to London City flights
Detroit to Heathrow flights
Minneapolis to Heathrow flights
Raleigh to Heathrow flights
Sky Harbor Intl to Heathrow flights
Dallas/Fort Worth to Gatwick flights
George Bush Intcntl to Heathrow flights
San Francisco to London City flights
Tampa to Heathrow flights

Top 3 airlines flying from Washington to Heathrow

Discover the top 3 airlines that operate flights from Washington to Heathrow. 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 29 October 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£352Average£516FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£356Average£598FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£371Average£619FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic 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 Washington to Heathrow?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Washington to Heathrow. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Washington to Heathrow?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Heathrow from Washington.

Can Cheapflights find flights from Washington to Heathrow with no change fees?

Need flexible booking options for your flight to Heathrow from Washington? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Washington to Heathrow become cheaper?

Of course! You can now track prices for flights from Washington to Heathrow and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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.