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Cheap flights from Washington, D.C. to London Heathrow Airport from £170

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 26/10. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — LHR
18 Jul — 25 Jul1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Washington, D.C. to London Heathrow are usually found in August or February, booked 50 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from Washington, D.C. to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Washington, D.C. to Heathrow
Explore the most affordable flight options available from Washington, D.C. to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 June 2026.

Thu 1/1023:20
BWI
-
LHR
1 stop16h 00m
Icelandair
Mon 5/1021:25
LHR
-
BWI
1 stop29h 50m
Icelandair
Deal found 18/6£570
Mon 3/820:30
BWI
-
LHR
1 stop10h 25m
Multiple Airlines
Wed 12/815:00
LHR
-
BWI
1 stop11h 52m
Multiple Airlines
Deal found 17/6£571
Wed 16/920:30
BWI
-
LHR
1 stop10h 25m
Multiple Airlines
Sat 26/914:00
LHR
-
BWI
Nonstop8h 15m
Multiple Airlines
Deal found 17/6£571
Thu 27/820:30
BWI
-
LHR
1 stop18h 50m
Icelandair
Sun 30/821:25
LHR
-
BWI
1 stop27h 00m
Icelandair
Deal found 18/6£572
Fri 2/1020:30
BWI
-
LHR
1 stop18h 50m
Multiple Airlines
Thu 8/1016:20
LHR
-
BWI
Nonstop8h 15m
Multiple Airlines
Deal found 17/6£573
Thu 20/823:20
BWI
-
LHR
1 stop31h 35m
Icelandair
Thu 27/821:25
LHR
-
BWI
1 stop27h 00m
Icelandair
Deal found 16/6£574
Sun 16/823:20
BWI
-
LHR
1 stop31h 35m
Multiple Airlines
Sun 23/815:00
LHR
-
BWI
1 stop13h 43m
Multiple Airlines
Deal found 16/6£574
Thu 27/820:30
BWI
-
LHR
1 stop10h 25m
Icelandair
Wed 2/913:05
LHR
-
BWI
1 stop11h 20m
Icelandair
Deal found 17/6£575
Fri 2/1020:30
BWI
-
LHR
1 stop18h 50m
Icelandair
Sun 18/1021:25
LHR
-
BWI
1 stop27h 00m
Icelandair
Deal found 16/6£577
Thu 1/1020:30
BWI
-
LHR
2 stops19h 50m
Multiple Airlines
Sun 4/1006:40
LHR
-
BWI
2 stops17h 45m
Multiple Airlines
Deal found 18/6£577
Sat 1/823:20
BWI
-
LHR
1 stop31h 35m
Multiple Airlines
Sat 15/809:15
LHR
-
BWI
1 stop13h 30m
Multiple Airlines
Deal found 18/6£578
Sat 25/720:30
BWI
-
LHR
1 stop18h 50m
Multiple Airlines
Sat 15/809:15
LHR
-
BWI
1 stop13h 30m
Multiple Airlines
Deal found 18/6£579

Find flight deals from Washington, D.C. to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 18 June 2026.

Round-trip from

£570

One-way from

£170

Popular in

June

Cheapest in

August

Average price

£942

Good round-trip deal

£722 or less

Good one-way deal

£398 or less
Icelandair
  • Icelandair
  • 2/10-5/10
  • 2 total stops
  • 48h 40m total
  • Washington, D.C. to London
Search Deals
Icelandair
  • Icelandair
  • 26/10
  • 1 total stop
  • 10h 10m total
  • Washington, D.C. to London
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (£148 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£23 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. (WAS) to London Heathrow.
Search Deals
Price to beat on a one-way flight from Washington, D.C. (WAS) to London Heathrow.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Washington, D.C. 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 18 June 2026.
Use the filters below to find and compare flights from Washington, D.C. to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Wed 7/10

12:15-06:25

1 stop13h 10m

London Heathrow

Tue 13/10

09:55-22:10

2 stops17h 15m

£646

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Sun 23/8

10:40-09:15

1 stop17h 35m

London Heathrow

Fri 23/10

09:55-22:10

2 stops17h 15m

£647

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sun 6/9

11:00-09:35

2 stops17h 35m

London Heathrow

Tue 15/9

06:40-19:50

2 stops18h 10m

£660

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 23/8

19:19-12:05

1 stop11h 46m

London Heathrow

Fri 23/10

17:55-21:05

Nonstop8h 10m

£660

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Mon 3/8

18:30-06:55

Nonstop7h 25m

London Heathrow

Wed 12/8

09:00-19:25

1 stop15h 25m

£664

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 22/9

12:25-17:40

2 stops24h 15m

London Heathrow

Tue 29/9

19:50-17:00

2 stops26h 10m

£668

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Thu 12/11

15:55-06:55

1 stop10h 00m

London Heathrow

Wed 18/11

09:20-16:20

1 stop12h 00m

£668

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Thu 5/11

15:55-06:55

1 stop10h 00m

London Heathrow

Fri 13/11

09:20-16:20

1 stop12h 00m

£668

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Fri 6/11

15:55-06:55

1 stop10h 00m

London Heathrow

Fri 13/11

09:20-16:20

1 stop12h 00m

£668

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 13/10

06:30-20:45

1 stop9h 15m

London Heathrow

Sun 6/12

09:20-16:00

1 stop11h 40m

£668

Flights are sorted by cheapest return flights first.

Deals found on 14/6

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Washington, D.C. to Heathrow

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

What is the cheapest month to book a flight from Washington, D.C. to London Heathrow Airport?

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to London Heathrow Airport (average of £210). Flying from Washington, D.C. to London Heathrow Airport in June is currently the most expensive (average of £1,065). 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 WAS to LHR?

Find hourly flight availability from Washington, D.C. 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 18 June 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. to London Heathrow Airport as you normally would.

Weekly flight availability from Washington, D.C. to London Heathrow Airport

Explore weekly flight availability from Washington, D.C. to Heathrow. 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 June 2026.

The most flights from WAS to LHR are scheduled on a Monday (28 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (26 on average).

How much does it cost for a return flight from Washington, D.C. to London Heathrow Airport?

What’s the top stopover airport for flights from Washington, D.C. to London Heathrow Airport?

Share of one-stop return flights from Washington, D.C. to London Heathrow Airport chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Dublin (DUB) – chosen by Cheapflights users on 60% of one-stop itineraries from Washington, D.C. to London Heathrow Airport on Cheapflights.

What’s the cheapest stopover airport for flights from Washington, D.C. to London Heathrow Airport?

Average return fare for one-stop flights from Washington, D.C. to London Heathrow Airport, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Reykjavik (KEF) is the most affordable one-stop option, with an average return flight price of £422.

What’s the fastest stopover option from Washington, D.C. to London Heathrow Airport?

Shortest average travel time for one-stop one-way flights from Washington, D.C. to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 9h 42m.

Which airport typically offers the quickest stopover for flights from Washington, D.C. to London Heathrow Airport?

Average stopover duration for one-stop one-way flights from Washington, D.C. to London Heathrow Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Dublin (DUB) offer the fastest connection on this route, with an average stopover time of 1h 28m.

How often are flights from Washington, D.C. to London delayed?

About 19% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 171 minutes.

What is the most punctual flight time for Washington, D.C. to London flights?

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Monday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Washington, D.C. to London flights?

Over the past year, British Airways have had the lowest number of delays on this route, with just 15% of flights being delayed.

How far ahead should I book a flight from Washington, D.C. to London Heathrow Airport?

Booking 62 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated 18 June 2026.
Get a feel of what it's like to fly with Virgin Atlantic,United Airlines, andAer Lingus from Washington, D.C. to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Virgin Atlantic
7.5
Good
690 reviews
Check prices

Boarding

7.7

Crew

8.1

Entertainment

7.5

Food

6.9

Comfort

7.3

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Virgin Atlantic
7.5
Good
690 reviews
Virgin Atlantic
7.5
Good
690 reviews
Check prices

Boarding

7.7

Crew

8.1

Entertainment

7.5

Food

6.9

Comfort

7.3

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
United Airlines
7.4
Good
9,859 reviews
Virgin Atlantic
7.5
Good
690 reviews
Check prices

Boarding

7.7

Crew

8.1

Entertainment

7.5

Food

6.9

Comfort

7.3

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Aer Lingus
7.3
Good
1,604 reviews
Virgin Atlantic
7.5
Good
690 reviews
Check prices

Boarding

7.7

Crew

8.1

Entertainment

7.5

Food

6.9

Comfort

7.3

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Icelandair
7.0
Good
679 reviews
Virgin Atlantic
7.5
Good
690 reviews
Check prices

Boarding

7.7

Crew

8.1

Entertainment

7.5

Food

6.9

Comfort

7.3

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
British Airways
6.7
Okay
8,054 reviews
Virgin Atlantic
7.5
Good
690 reviews
Check prices

Boarding

7.7

Crew

8.1

Entertainment

7.5

Food

6.9

Comfort

7.3

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. 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 Washington, D.C. to London Heathrow Airport?

    Delta, Scandinavian Airlines, and United Airlines can get you from Washington, D.C. to London Heathrow Airport in just under 7h 25m. Your travel time can differ by up to 10h 10m. The distance between Washington, D.C. and London Heathrow Airport is about 3664 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 flying from Washington, D.C. to London Heathrow Airport round-trip?

    Currently priced at £302, Lufthansa will fly you from Washington, D.C. to London Heathrow Airport and back. In addition to Lufthansa, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Icelandair and Virgin Atlantic - these airlines can fly you to your destination from £369 and £379, respectively. You may be able to fly from Washington, D.C. to London Heathrow Airport for 51% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Washington, D.C. to London Heathrow Airport one-way?

    One-way options have recently been found by users for as low as £159 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include JetBlue from £229 and British Airways from £285 one-way.

  • What are the most popular routes from Washington, D.C. to London Heathrow Airport?

    Most travelers choose Washington, D.C. Dulles Intl - London Heathrow, Baltimore/Washington - London Heathrow or Washington, D.C. Reagan-National - London Heathrow when deciding on the best route from Washington, D.C. to London Heathrow Airport.

  • What are the most reliable airlines from Washington, D.C. to London Heathrow Airport?

    No one likes to see their flight delayed. When booking a flight from Washington, D.C. to London Heathrow Airport consider choosing American Airlines (78%), British Airways (78%) or Aer Lingus (77%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Washington, D.C. to London Heathrow Airport?

    While on average a flight from Washington, D.C. to London Heathrow Airport is generally £950, our data shows the cheapest flight currently is £335. When looking at the most popular route, (Washington, D.C. Dulles Intl - London Heathrow), you can expect to pay £453 for that flight.

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

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

  • How can I find direct flights from Washington, D.C. to Heathrow?

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

  • Can I find deals for business class flights from Washington, D.C. to Heathrow?

    Yes. Cheapflights offers flight deals from Washington, D.C. 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 Washington, D.C. to London Heathrow Airport?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to London Heathrow Airport (average of £210). Flying from Washington, D.C. to London Heathrow Airport in June is currently the most expensive (average of £1,065). 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
Hounslow
Milton Keynes
Wembley
Luton
Gatwick
Croydon
Slough
Ilford
Hayes
Brentford
Colchester
Northampton
Kingston upon Thames
Swindon
Eastbourne
Watford
Poole
Guildford
Romford
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.

Top 5 airlines flying from Washington, D.C. to Heathrow

Discover the top 5 airlines that operate flights from Washington, D.C. 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 18 June 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£302Average£357FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£369Average£630FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£379Average£571FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£387Average£580FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£492Average£661FlexibilityNo cancel feeOn-time69%
Search United Airlines 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, D.C. to Heathrow?

When you search for this flight from Washington, D.C. to Heathrow, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Washington, D.C. to Heathrow?

Cheapflights helps you find that perfect flight to Heathrow from Washington, D.C. by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Washington, D.C. to Heathrow with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Washington, D.C. to Heathrow flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Washington, D.C. to Heathrow become cheaper?

Not ready to book yet? You can track prices for flights from Washington, D.C. to Heathrow on Cheapflights with our Price Alert feature and get notified when better prices are available.

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