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Cheap flights from Washington, D.C. Reagan-National Airport to London Heathrow Airport from £218

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 2/11. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — LHR
18 Aug — 25 Aug1
1 adult

Cheap flight deals from Reagan-National to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Reagan-National (DCA) 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 13 August 2025.

Round-trip from

£370

One-way from

£218

Popular in

June

Cheapest in

October

Average price

£494
Air Canada
  • Air Canada
  • 7/9-16/9
  • 2 total stops
  • 23h 26m total
  • Washington, D.C. to London
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JetBlue
  • JetBlue
  • 2/11
  • 1 total stop
  • 14h 10m total
  • Washington, D.C. to London
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£74 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£12 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2025
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Find flight deals from Reagan-National to Heathrow

Cheapest flights from Reagan-National to Heathrow
Explore the most affordable flight options available from Reagan-National to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 August 2025.

Sun 7/918:45DCA - LHR
1 stop12h 05mAir Canada
Tue 16/909:30LHR - DCA
1 stop11h 21mAir Canada
Deal found 11/8£370
Wed 15/1016:35DCA - LHR
1 stop12h 00mAir Canada
Tue 21/1012:05LHR - DCA
1 stop15h 29mAir Canada
Deal found 12/8£373
Mon 8/912:55DCA - LHR
1 stop12h 35mMultiple Airlines
Tue 16/908:45LHR - DCA
2 stops15h 59mMultiple Airlines
Deal found 11/8£373
Wed 24/912:55DCA - LHR
1 stop14h 40mAir Canada
Thu 9/1006:50LHR - DCA
2 stops14h 01mAir Canada
Deal found 11/8£374
Mon 22/916:35DCA - LHR
1 stop12h 00mAir Canada
Thu 2/1006:50LHR - DCA
2 stops14h 01mAir Canada
Deal found 11/8£375
Mon 8/912:55DCA - LHR
1 stop12h 35mAir Canada
Wed 24/906:50LHR - DCA
2 stops14h 01mAir Canada
Deal found 11/8£377
Sun 7/915:35DCA - LHR
1 stop9h 45mIberia
Tue 16/911:30LHR - DCA
2 stops16h 37mIberia
Deal found 11/8£378
Tue 9/911:00DCA - LHR
2 stops14h 30mAir Canada
Tue 16/908:45LHR - DCA
2 stops15h 59mAir Canada
Deal found 11/8£379

Cheapflights Fare Finder

 
Customise your flight search to find flights from Reagan-National 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 13 August 2025.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to London Heathrow Airport that are best for you.

Fly from

Reagan-National

Fly to

Heathrow

Route

Depart

Return

Price

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Mon 22/9

12:55-09:35

2 stops15h 40m

London Heathrow

Thu 2/10

06:50-15:51

2 stops14h 01m

£375

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 28/10

12:55-07:10

2 stops14h 15m

London Heathrow

Wed 5/11

06:50-15:31

2 stops13h 41m

£375

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Mon 8/9

12:55-06:30

1 stop12h 35m

London Heathrow

Wed 24/9

06:50-15:51

2 stops14h 01m

£377

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 12/11

11:05-06:30

2 stops14h 25m

London Heathrow

Tue 18/11

06:50-15:31

2 stops13h 41m

£379

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Mon 1/9

12:55-06:30

1 stop12h 35m

London Heathrow

Wed 10/9

12:40-12:08

1 stop28h 28m

£382

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 3/9

16:35-09:35

1 stop12h 00m

London Heathrow

Thu 11/9

09:30-15:51

1 stop11h 21m

£382

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 10/9

06:00-09:35

1 stop22h 35m

London Heathrow

Tue 16/9

09:30-10:20

1 stop29h 50m

£382

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 2/9

16:35-09:35

1 stop12h 00m

London Heathrow

Tue 9/9

09:30-15:51

1 stop11h 21m

£382

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 22/10

16:35-09:35

1 stop12h 00m

London Heathrow

Thu 30/10

13:25-21:56

1 stop12h 31m

£382

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Wed 10/9

12:55-08:35

1 stop14h 40m

London Heathrow

Fri 26/9

14:05-10:20

1 stop25h 15m

£382

Flights are sorted by cheapest return flights first.

Deals found on 12/8

Showing 1-10 of 22 results
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Best time to book a flight from Reagan-National to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Reagan-National 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. Reagan-National Airport to London Heathrow Airport

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

Use this chart to determine the optimal time to book a return flight from Reagan-National to Heathrow. Price data was last updated on 8 August 2025.

The best time to book flights from Washington, D.C. Reagan-National Airport to London Heathrow Airport is 44 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to London Heathrow Airport (average of £112). Flying from Washington, D.C. Reagan-National Airport to London Heathrow Airport in August is currently the most expensive (average of £164). 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.

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

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

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

Montreal (YUL) – chosen by Cheapflights users on 50% of one-stop itineraries from Washington, D.C. Reagan-National Airport to London Heathrow Airport on Cheapflights.

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

Average return fare for one-stop flights from Washington, D.C. Reagan-National Airport 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 £400.

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

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

Flights via Philadelphia (PHL) have the shortest average one-way travel time for one-stop routes: 8h 50m.

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

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

Flights via Philadelphia (PHL) offer the fastest connection on this route, with an average stopover time of 2h 09m.

Related info for your journey

Find useful and relevant information for your journey from Reagan-National to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What is the cheapest airline to fly from Washington, D.C. Reagan-National Airport to London Heathrow Airport round-trip?

    Flying on Air Canada is currently your cheapest option to London Heathrow Airport, with prices starting at £370. Users have found that Air Canada is 35% cheaper than the other options available to this destination.

  • Can I find deals for flights from Reagan-National to Heathrow that include hotel bookings?

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

  • How can I find direct flights from Reagan-National to Heathrow?

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

  • Can I find deals for business class flights from Reagan-National to Heathrow?

    Yes. Cheapflights offers flight deals from Reagan-National 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. Reagan-National Airport to London Heathrow Airport?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to London Heathrow Airport (average of £112). Flying from Washington, D.C. Reagan-National Airport to London Heathrow Airport in August is currently the most expensive (average of £164). 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

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Ilford
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Why should you use Cheapflights to find cheap flight tickets from Reagan-National to Heathrow?

Cheapflights helps you find that perfect flight to Heathrow from Reagan-National 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 Reagan-National to Heathrow with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Reagan-National to Heathrow, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Reagan-National to Heathrow become cheaper?

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

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