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Cheap flights from Washington, D.C. to London Heathrow Airport from £261

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 14/5. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — LHR
31 May — 7 Jun1
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 28 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 1 May 2026.

Sun 10/520:30
BWI
-
LHR
1 stop10h 25m
Icelandair
Tue 19/513:05
LHR
-
BWI
1 stop14h 10m
Icelandair
Deal found 26/4£520
Mon 16/1120:30
IAD
-
LHR
1 stop17h 00m
Scandinavian Airlines
Wed 2/1221:05
LHR
-
IAD
2 stops25h 10m
Scandinavian Airlines
Deal found 27/4£525
Wed 7/1020:20
IAD
-
LHR
2 stops31h 35m
Scandinavian Airlines
Sat 10/1006:40
LHR
-
IAD
1 stop15h 20m
Scandinavian Airlines
Deal found 27/4£529
Wed 23/923:20
BWI
-
LHR
1 stop16h 00m
Icelandair
Sat 3/1013:05
LHR
-
BWI
1 stop14h 10m
Icelandair
Deal found 27/4£531
Wed 23/920:30
IAD
-
LHR
1 stop18h 50m
Icelandair
Sat 3/1013:05
LHR
-
IAD
1 stop11h 15m
Icelandair
Deal found 27/4£531
Tue 15/920:30
BWI
-
LHR
1 stop10h 25m
Icelandair
Tue 6/1013:05
LHR
-
BWI
1 stop11h 20m
Icelandair
Deal found 29/4£533
Sat 26/920:20
IAD
-
LHR
1 stop16h 20m
Scandinavian Airlines
Wed 7/1010:20
LHR
-
IAD
1 stop11h 40m
Scandinavian Airlines
Deal found 26/4£534
Tue 10/1119:40
BWI
-
LHR
1 stop18h 50m
Icelandair
Tue 17/1120:35
LHR
-
BWI
1 stop27h 05m
Icelandair
Deal found 30/4£534
Thu 8/1020:20
IAD
-
LHR
2 stops37h 15m
Scandinavian Airlines
Sun 11/1010:20
LHR
-
IAD
1 stop11h 40m
Scandinavian Airlines
Deal found 27/4£534
Tue 29/923:20
BWI
-
LHR
1 stop31h 35m
Icelandair
Mon 5/1013:05
LHR
-
BWI
1 stop11h 20m
Icelandair
Deal found 30/4£536
Thu 19/1119:40
IAD
-
LHR
1 stop10h 10m
Icelandair
Wed 25/1112:15
LHR
-
IAD
1 stop11h 15m
Icelandair
Deal found 26/4£536
Thu 1/1020:30
BWI
-
LHR
1 stop10h 25m
Icelandair
Thu 8/1013:05
LHR
-
BWI
1 stop11h 20m
Icelandair
Deal found 27/4£536

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 1 May 2026.

Round-trip from

£520

One-way from

£261

Popular in

June

Cheapest in

August

Average price

£656

Good round-trip deal

£692 or less

Good one-way deal

£365 or less
Icelandair
  • Icelandair
  • 10/5-19/5
  • 2 total stops
  • 24h 35m total
  • Washington, D.C. to London
Search Deals
Icelandair
  • Icelandair
  • 14/5
  • 1 total stop
  • 16h 00m total
  • Washington, D.C. to London
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£92 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£16 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 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 1 May 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

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Mon 7/9

22:55-11:20

Nonstop7h 25m

London Heathrow

Thu 17/9

08:40-15:35

1 stop11h 55m

£630

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Mon 10/8

15:05-10:20

2 stops14h 15m

London Heathrow

Wed 19/8

08:40-18:11

2 stops14h 31m

£644

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 12/8

12:05-07:10

2 stops14h 05m

London Heathrow

Fri 21/8

08:40-18:11

2 stops14h 31m

£644

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Sat 15/8

19:04-06:45

1 stop30h 41m

London Heathrow

Tue 25/8

09:30-17:29

2 stops36h 59m

£647

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Tue 15/9

18:09-09:25

1 stop10h 16m

London Heathrow

Fri 9/10

16:25-19:40

Nonstop8h 15m

£655

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 20/10

12:00-09:20

2 stops16h 20m

London Heathrow

Fri 23/10

07:05-23:04

2 stops20h 59m

£655

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 21/10

11:00-09:35

2 stops17h 35m

London Heathrow

Sun 25/10

19:30-23:04

2 stops31h 34m

£661

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Sun 9/8

18:20-11:20

1 stop12h 00m

London Heathrow

Wed 19/8

11:15-19:25

1 stop13h 10m

£662

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 8/9

13:20-09:50

1 stop15h 30m

London Heathrow

Tue 15/9

22:40-11:35

1 stop17h 55m

£666

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Mon 3/8

20:40-06:45

1 stop29h 05m

London Heathrow

Thu 13/8

14:05-00:43

2 stops39h 38m

£675

Flights are sorted by cheapest return flights first.

Deals found on 30/4

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

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.

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 £208). Flying from Washington, D.C. to London Heathrow Airport in December is currently the most expensive (average of £938). 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 1 May 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 1 May 2026.

The most flights from WAS to LHR are scheduled on a Wednesday (28 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (21 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 50% 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.

Montreal (YUL) is the most affordable one-stop option, with an average return flight price of £398.

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 25m.

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 35m.

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

About 20% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 168 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.

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 1 May 2026.
Get a feel of what it's like to fly with United Airlines,Virgin Atlantic, 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.
United Airlines
7.4
Good
9,677 reviews
Check prices

Food

6.6

Comfort

7.3

Crew

8.1

Overall

7.4

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,677 reviews
United Airlines
7.4
Good
9,677 reviews
Check prices

Food

6.6

Comfort

7.3

Crew

8.1

Overall

7.4

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
Virgin Atlantic
7.4
Good
688 reviews
United Airlines
7.4
Good
9,677 reviews
Check prices

Food

6.6

Comfort

7.3

Crew

8.1

Overall

7.4

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
Aer Lingus
7.3
Good
1,540 reviews
United Airlines
7.4
Good
9,677 reviews
Check prices

Food

6.6

Comfort

7.3

Crew

8.1

Overall

7.4

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
Icelandair
7.0
Good
646 reviews
United Airlines
7.4
Good
9,677 reviews
Check prices

Food

6.6

Comfort

7.3

Crew

8.1

Overall

7.4

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
British Airways
6.7
Okay
7,937 reviews
United Airlines
7.4
Good
9,677 reviews
Check prices

Food

6.6

Comfort

7.3

Crew

8.1

Overall

7.4

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

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?

    KLM, Delta, 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 23h 16m. 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 £306, 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 Virgin Atlantic and British Airways - these airlines can fly you to your destination from £375 and £387, respectively. You may be able to fly from Washington, D.C. to London Heathrow Airport for 47% 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 £158 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include JetBlue from £226 and Virgin Atlantic from £260 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 United Airlines (89%), Delta (85%) or Virgin Atlantic (85%) 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 £805, our data shows the cheapest flight currently is £379. When looking at the most popular route, (Washington, D.C. Dulles Intl - London Heathrow), you can expect to pay £474 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 £208). Flying from Washington, D.C. to London Heathrow Airport in December is currently the most expensive (average of £938). 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
Wembley
Croydon
Northampton
Hounslow
Luton
Gatwick
Ilford
Slough
Hayes
Brentford
Colchester
Romford
Watford
Kingston upon Thames
Eastbourne
Swindon
Ipswich
Southend-on-Sea
Guildford

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 6 airlines flying from Washington, D.C. to Heathrow

Discover the top 6 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 1 May 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£306Average£401FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Virgin AtlanticCheapest£375Average£564FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
IcelandairCheapest£383Average£555FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£387Average£562FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£486Average£654FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest£507Average£713FlexibilityNo cancel feeOn-time71%
Search American 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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