Flight Routes from Washington DC to London Heathrow

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Our cheapest offers for flights from Washington DC to London Heathrow

Here you can compare cheap flights from Washington DC (IAD) to London Heathrow (LHR) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to London Heathrow. Prices and availability may change at any time.

Flight schedule from Washington DC (IAD) to London Heathrow (LHR)

Select a travel date in the flight schedule for the route from Washington DC (IAD) to London Heathrow (LHR) and compare affordable flight deals.

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Active filtersnone
Matching outbound flights11 of 11
fromto
dep.arr.
durationstopovers
  1. August 16 – 22, 2026
  2. August 23 – 29, 2026
  3. Aug 30 – Sep 5, 2026
    1. IADLHR
      1 stopover
      1. Aer Lingus Irish Airlines
    2. IADLHR
      nonstop
      1. British Airways
    3. IADLHR
      nonstop
      1. United Airlines
    4. IADLHR
      nonstop
      1. British Airways
    5. IADLHR
      1 stopover
      1. Icelandair
    6. IADLHR
      1 stopover
      1. Icelandair
    7. IADLHR
      nonstop
      1. British Airways
    8. IADLHR
      nonstop
      1. United Airlines
    9. IADLHR
      nonstop
      1. British Airways
    10. IADLHR
      nonstop
      1. Virgin Atlantic Airways
    11. IADLHR
      1 stopover
      1. Icelandair

      Tips and tricks to help you find cheap flights from Washington DC to London Heathrow

      Favorite airline: Aer Lingus
      Aer Lingus is the most popular airline for flights from Washington DC to London Heathrow.
      Aer Lingus
      30 %
      Icelandair
      24 %
      British Airways
      17 %
      Cheapest weekday: Thursday
      Compared to other weekdays, flights are cheapest on Thursday.
      Stopover flights are the cheapest connection
      Compared to flights with a stopover, direct flights are $129.00 more expensive on this route.
      non stop flight
      1 stop
      2 stops
      07h 20min
      18h 45min
      21h 40min
      $562
      $433
      $599
      Favourite connection: via Dublin
      When booking flights from Washington DC to London Heathrow 33 % of travelers prefer to fly via Dublin.
      Route
      bookings
      1 stopover Dublin
      11h 00min, from $442
      33 %
      1 stopover Reykjavik-Keflavik International
      18h 45min, from $433
      27 %
      Direct flights
      07h 20min, from $562
      22 %

      Flight information: Washington DC - London Heathrow

      Roundtrip from $767.80
      Flight duration min. 07:00 / max. 07:25
      Return flight duration min. 08:20/ max. 08:45
      Distance 5908 km
      Flights per week 52
      Departure airport Airport Washington DC - Dulles International Airport, DC (IAD)
      Arrival airport Airport London Heathrow (LHR)
      Destination country Flights to United Kingdom
      City-Code - Arrival airport Washington-DC - London Heathrow
      Departure airport - Destination country Washington DC - Dulles International Airport, DC - United Kingdom
      Departure airport - City-Code Washington DC - Dulles International Airport, DC - London
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