Flights from London Heathrow to Washington DC

Our cheapest offers for flights from London Heathrow to Washington DC

Here you can compare cheap flights from London Heathrow (LHR) to Washington DC (IAD) 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 Washington DC. Prices and availability may change at any time.

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 %
18 %
Tip: book 6 months before departure
Tip: book flights on this route 6 months before departure and save up to 54 %.
179 days before departure
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
Favourite connection: via Dublin
Stopover flights on this route are especially popular via Dublin, making up 33 % of 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 %

Flight information: London Heathrow - Washington DC

Outbound and return from £472.22
Flight duration min. 08:20 / max. 08:45
Return flight duration min. 07:00/ max. 07:25
Distance 5908 km
Flights per week 52
Departure airport London Heathrow (LHR)
Arrival airport Washington DC - Dulles International Airport, DC (IAD)
Destination country United States
Alternative flights to Washington DC
Popular destinations for onward travel