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Cheap flights from Washington, D.C. to London Heathrow Airport from £225

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 3/8. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — LHR
23 Apr — 30 Apr1
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 September, booked 28 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

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 24 March 2026.

Mon 20/422:35
IAD
-
LHR
1 stop18h 25m
TAP AIR PORTUGAL
Wed 29/418:45
LHR
-
IAD
1 stop25h 25m
TAP AIR PORTUGAL
Deal found 22/3£467
Sun 26/420:20
IAD
-
LHR
2 stops37h 15m
Scandinavian Airlines
Wed 29/410:20
LHR
-
IAD
1 stop11h 40m
Scandinavian Airlines
Deal found 20/3£468
Sun 19/422:35
IAD
-
LHR
1 stop18h 25m
TAP AIR PORTUGAL
Mon 4/513:45
LHR
-
IAD
1 stop30h 25m
TAP AIR PORTUGAL
Deal found 21/3£469
Sun 19/422:35
IAD
-
LHR
1 stop33h 10m
TAP AIR PORTUGAL
Thu 30/406:00
LHR
-
IAD
1 stop14h 10m
TAP AIR PORTUGAL
Deal found 21/3£470
Tue 5/522:35
IAD
-
LHR
1 stop19h 20m
TAP AIR PORTUGAL
Tue 12/506:00
LHR
-
IAD
1 stop19h 35m
TAP AIR PORTUGAL
Deal found 20/3£472
Mon 20/422:35
IAD
-
LHR
1 stop15h 15m
TAP AIR PORTUGAL
Thu 30/413:45
LHR
-
IAD
1 stop30h 25m
TAP AIR PORTUGAL
Deal found 19/3£472
Tue 28/417:05
IAD
-
LHR
1 stop14h 40m
TAP AIR PORTUGAL
Tue 5/506:00
LHR
-
IAD
1 stop14h 10m
TAP AIR PORTUGAL
Deal found 19/3£475
Mon 4/522:35
IAD
-
LHR
1 stop19h 20m
TAP AIR PORTUGAL
Mon 11/519:50
LHR
-
IAD
1 stop29h 45m
TAP AIR PORTUGAL
Deal found 20/3£475
Mon 4/520:20
IAD
-
LHR
1 stop14h 40m
Scandinavian Airlines
Mon 11/510:20
LHR
-
IAD
1 stop11h 40m
Scandinavian Airlines
Deal found 20/3£477
Sat 2/520:20
IAD
-
LHR
1 stop16h 20m
Scandinavian Airlines
Fri 8/519:30
LHR
-
IAD
1 stop26h 30m
Scandinavian Airlines
Deal found 22/3£478
Mon 20/422:35
IAD
-
LHR
1 stop18h 25m
TAP AIR PORTUGAL
Mon 4/513:45
LHR
-
IAD
1 stop30h 25m
TAP AIR PORTUGAL
Deal found 21/3£479
Sun 19/422:35
IAD
-
LHR
1 stop15h 15m
TAP AIR PORTUGAL
Wed 29/419:50
LHR
-
IAD
1 stop24h 20m
TAP AIR PORTUGAL
Deal found 23/3£480

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 24 March 2026.

Round-trip from

£467

One-way from

£225

Popular in

June

Cheapest in

August

Average price

£596

Good round-trip deal

£600 or less

Good one-way deal

£293 or less
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 20/4-29/4
  • 2 total stops
  • 43h 50m total
  • Washington, D.C. to London
Search Deals
Icelandair
  • Icelandair
  • 3/8
  • 1 total stop
  • 18h 50m total
  • Washington, D.C. to London
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£69 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£13 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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 24 March 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

Sun 16/8

22:15-10:40

Nonstop7h 25m

London Heathrow

Wed 26/8

06:50-14:20

1 stop12h 30m

£596

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 21/4

22:10-10:40

Nonstop7h 30m

London Heathrow

Wed 29/4

06:50-14:20

1 stop12h 30m

£596

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 5/5

18:25-06:55

Nonstop7h 30m

London Heathrow

Tue 19/5

06:50-14:20

1 stop12h 30m

£596

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 12/8

18:30-06:55

Nonstop7h 25m

London Heathrow

Tue 25/8

06:50-14:20

1 stop12h 30m

£596

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Sun 16/8

17:38-09:05

1 stop10h 27m

London Heathrow

Wed 26/8

14:00-17:15

Nonstop8h 15m

£622

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 1/9

13:30-16:00

2 stops21h 30m

London Heathrow

Tue 6/10

07:05-23:04

2 stops20h 59m

£628

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Sun 2/8

10:44-06:45

1 stop15h 01m

London Heathrow

Fri 21/8

14:10-00:43

1 stop15h 33m

£629

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Tue 8/9

14:10-10:20

2 stops15h 10m

London Heathrow

Tue 29/9

09:20-17:08

1 stop12h 48m

£632

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Wed 15/4

11:08-05:55

2 stops13h 47m

London Heathrow

Tue 21/4

10:25-21:23

2 stops15h 58m

£632

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 12/5

22:55-11:20

Nonstop7h 25m

London Heathrow

Wed 20/5

09:55-15:35

1 stop10h 40m

£634

Flights are sorted by cheapest return flights first.

Deals found on 20/3

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?

Use this chart to determine the optimal time to book a return flight from Washington, D.C. to Heathrow. Price data was last updated on 13 March 2026.

Booking 28 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, March is the cheapest month in which you can book a flight from Washington, D.C. to London Heathrow Airport (average of £23). Flying from Washington, D.C. to London Heathrow Airport in June is currently the most expensive (average of £522). 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 24 March 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.

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 52% 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 £402.

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 164 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, Virgin Atlantic 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 24 March 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
685 reviews
Check prices

Crew

8.1

Food

6.9

Comfort

7.3

Entertainment

7.5

Overall

7.5

Boarding

7.7

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Virgin Atlantic
7.5
Good
685 reviews
Virgin Atlantic
7.5
Good
685 reviews
Check prices

Crew

8.1

Food

6.9

Comfort

7.3

Entertainment

7.5

Overall

7.5

Boarding

7.7

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
United Airlines
7.4
Good
9,476 reviews
Virgin Atlantic
7.5
Good
685 reviews
Check prices

Crew

8.1

Food

6.9

Comfort

7.3

Entertainment

7.5

Overall

7.5

Boarding

7.7

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Aer Lingus
7.2
Good
1,487 reviews
Virgin Atlantic
7.5
Good
685 reviews
Check prices

Crew

8.1

Food

6.9

Comfort

7.3

Entertainment

7.5

Overall

7.5

Boarding

7.7

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Icelandair
7.0
Good
625 reviews
Virgin Atlantic
7.5
Good
685 reviews
Check prices

Crew

8.1

Food

6.9

Comfort

7.3

Entertainment

7.5

Overall

7.5

Boarding

7.7

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
British Airways
6.7
Okay
7,818 reviews
Virgin Atlantic
7.5
Good
685 reviews
Check prices

Crew

8.1

Food

6.9

Comfort

7.3

Entertainment

7.5

Overall

7.5

Boarding

7.7

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

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?

    United Airlines, British Airways, and Scandinavian 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 14h 05m. 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 £309, 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 46% 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 Virgin Atlantic from £262 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 KLM (90%), Air France (90%) or Delta (90%) 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 £508, our data shows the cheapest flight currently is £270. When looking at the most popular route, (Washington, D.C. Dulles Intl - London Heathrow), you can expect to pay £468 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, March is the cheapest month in which you can book a flight from Washington, D.C. to London Heathrow Airport (average of £23). Flying from Washington, D.C. to London Heathrow Airport in June is currently the most expensive (average of £522). 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
Slough
Ilford
Hayes
Brentford
Colchester
Eastbourne
Guildford
Watford
Kingston upon Thames
Romford
Ipswich
Swindon
Bedford

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

Discover the top 8 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 24 March 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£309Average£429FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£369Average£564FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£379Average£570FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£390Average£547FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air FranceCheapest£397Average£552FlexibilityNo cancel feeOn-time77%
Search Air France flights
IberiaCheapest£457Average£593FlexibilityNo cancel feeOn-time77%
Search Iberia flights
United AirlinesCheapest£491Average£573FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest£512Average£720FlexibilityNo 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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