Flight Routes from Washington DC to London Heathrow

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

Trip type
Cheapest roundtrip flight
from€768
Fastest outbound flight
Fastest inbound flight
non-stop flights
52x / week
Flight distance
5,908 km
Time difference

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.

offers
Active filtersnone
Matching outbound flightsIAD–LHR · 10 of 10
fromto
dep.arr.
durationstopovers
  1. October 4 – 10, 2026
  2. October 11 – 17, 2026
  3. October 18 – 24, 2026
    1. IADLHR
      1 stopover
      1. Air Canada
    2. IADLHR
      1 stopover
      1. Aer Lingus Irish Airlines
    3. IADLHR
      1 stopover
      1. United Airlines
    4. IADLHR
      nonstop
      1. British Airways
    5. IADLHR
      1 stopover
      1. Austrian Airlines
    6. IADLHR
      nonstop
      1. United Airlines
    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

      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 $129.00 more expensive on this route.
      non stop flight
      1 stop
      2 stops
      07h 20min
      18h 45min
      21h 40min
      US$ 562
      US$ 433
      US$ 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 US$ 442
      33 %
      1 stopover Reykjavik-Keflavik International
      18h 45min, from US$ 433
      27 %
      Direct flights
      07h 20min, from US$ 562
      22 %

      Important flight information

      Discover more flights around Washington DC and London Heathrow

      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
      Alternative routes to United Kingdom
      Alternative flights to London Heathrow
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