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.

Outbound Return Airlines Shop Baggage Price
London Heathrow
Washington DC
Outbound
03/09/25
1 Stopover (CPH)
SK0502, SK0925
14h 39min
Return
15/09/25
1 Stopover (CPH)
SK0926, SK1517
14h 35min
SAS Scandinavian Airlines ?
£570
Best option
London Heathrow
Washington DC
Outbound
02/05/25
direct
AY5533
08h 05min
Return
19/05/25
direct
AY5532
07h 25min
Finnair
£667
London Heathrow
Washington DC
Outbound
13/05/25
2 Stopovers (OSL, CPH)
SK0802, SK1461, SK0925
41h 54min
Return
09/06/25
1 Stopover (CPH)
SK0926, SK0501
30h 15min
SAS Scandinavian Airlines
£581
London Heathrow
Washington DC
Outbound
02/05/25
1 Stopover (CPH)
SK0500, SK0925
18h 19min
Return
19/05/25
1 Stopover (CPH)
SK0926, SK1517
14h 35min
SAS Scandinavian Airlines ?
£585
London Heathrow
Washington DC
Outbound
13/05/25
1 Stopover (CPH)
SK0502, SK0925
14h 39min
Return
09/06/25
1 Stopover (CPH)
SK0926, SK1501
18h 35min
SAS Scandinavian Airlines
£586
London Heathrow
Washington DC
Outbound
13/05/25
1 Stopover (CPH)
SK0502, SK0925
14h 39min
Return
09/06/25
1 Stopover (CPH)
SK0926, SK1501
18h 35min
SAS Scandinavian Airlines
£587
London Heathrow
Washington DC
Outbound
13/05/25
1 Stopover (CPH)
SK0502, SK0925
14h 39min
Return
09/06/25
1 Stopover (CPH)
SK0926, SK1501
18h 35min
SAS Scandinavian Airlines
£588
London Heathrow
Washington DC
Outbound
02/05/25
1 Stopover (CPH)
SK0500, SK0925
18h 19min
Return
19/05/25
1 Stopover (CPH)
SK0926, SK1517
14h 35min
SAS Scandinavian Airlines
£591
London Heathrow
Washington DC
Outbound
02/05/25
1 Stopover (CPH)
SK0500, SK0925
18h 19min
Return
19/05/25
1 Stopover (CPH)
SK0926, SK1501
18h 35min
SAS Scandinavian Airlines ?
£594
London Heathrow
Washington DC
Outbound
03/09/25
1 Stopover (JFK)
DL0002, DL3931
13h 42min
Return
15/09/25
1 Stopover (JFK)
DL3950, DL0003
16h 45min
Delta Air Lines
£597
Prices based on recent searches, subject to last-minute changes
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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

Flight information: London Heathrow - Washington DC

Outbound and return from 569,13 £
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 Airport London Heathrow (LHR)
Arrival airport Airport Washington DC - Dulles International Airport, DC (IAD)
Destination country Flights to United States
Alternative routes to United States
Alternative flights to Washington DC
Popular destinations for onward travel
Flight destinations with a similar price