Flight Routes from London Heathrow to Washington DC

Compare cheap outbound and return flights from London Heathrow (LHR) to Washington DC (IAD) and find the best offer from numerous airlines and travel agencies.

Trip type
Cheapest roundtrip flight
from€351
Fastest outbound flight
Fastest inbound flight
non-stop flights
52x / week
Flight distance
5,908 km
Time difference

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

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

offers
Active filtersnone
Matching outbound flightsLHR–IAD · 15 of 15
fromto
dep.arr.
durationstopovers
  1. 14 – 20 September 2026
  2. 21 – 27 September 2026
  3. 28 Sept – 4 Oct 2026
    1. LHRIAD
      1 stopover
      1. Austrian Airlines
    2. LHRIAD
      1 stopover
      1. Lufthansa
    3. LHRIAD
      1 stopover
      1. Aer Lingus Irish Airlines
    4. LHRIAD
      1 stopover
      1. Lufthansa
    5. LHRIAD
      1 stopover
      1. Lufthansa
    6. LHRIAD
      1 stopover
      1. Aer Lingus Irish Airlines
    7. LHRIAD
      1 stopover
      1. Aer Lingus Irish Airlines
    8. LHRIAD
      non-stop
      1. United Airlines
    9. LHRIAD
      non-stop
      1. British Airways
    10. LHRIAD
      non-stop
      1. British Airways
    11. LHRIAD
      non-stop
      1. British Airways
    12. LHRIAD
      non-stop
      1. United Airlines
    13. LHRIAD
      non-stop
      1. United Airlines
    14. LHRIAD
      non-stop
      1. British Airways
    15. LHRIAD
      non-stop
      1. Virgin Atlantic Airways

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

      Favourite airline: Aer Lingus
      The majority of passengers on the route London Heathrow – Washington DC prefer to fly with Aer Lingus.
      Aer Lingus
      32 %
      TAP Portugal
      25 %
      Icelandair
      18 %
      Cheapest weekday: Saturday
      Compared to other weekdays, flights are cheapest on Saturday.
      Stopover flights are the cheapest connection
      Flights with a stopover are on average £183.00 cheaper than direct flights.
      non stop flight
      1 stop
      08h 05min
      15h 25min
      £655
      £472
      Favourite connection: via Dublin
      Stopover flights on this route are especially popular via Dublin, making up 33 % of bookings.
      Route
      bookings
      1 stopover Dublin
      13h 55min, from £652
      33 %
      1 stopover Lisbon
      12h 25min, from £540
      26 %
      1 stopover Reykjavik-Keflavik International
      15h 25min, from £472
      19 %

      Important flight information

      Frequently Asked Questions (FAQ)

      Which airports near London Heathrow are frequently used for flights to Washington DC?
      As well as London Heathrow airport, users also frequently search for flights from London Gatwick to Washington DC. Alternative departure airports can offer more choice of flight times, airlines or prices. Do also check how accessible each airport is for you.

      Discover more flights around London Heathrow and Washington DC

      Departure airport Airport London Heathrow (LHR)
      Arrival airport Airport Washington DC - Dulles International Airport, DC (IAD)
      Destination country Flights to United States
      City-Code - Arrival airport London - Washington DC - Dulles International Airport, DC
      Departure airport - Destination country London Heathrow - United States
      Departure airport - City-Code London Heathrow - Washington-DC
      Alternative routes to United States
      Alternative flights to Washington DC
      Popular destinations for onward travel
      Flight destinations with a similar price