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
Best option
London Heathrow
Washington DC
Outbound
10/18/25
1 Stopover (CPH)
SK0502, SK0925
14h 39min
Return
11/17/25
1 Stopover (CPH)
SK0926, SK0505
14h 30min
SAS Scandinavian Airlines ?
$560
London Heathrow
Washington DC
Outbound
10/18/25
1 Stopover (CPH)
SK0502, SK0925
14h 39min
Return
11/17/25
1 Stopover (CPH)
SK0926, SK1501
20h 10min
SAS Scandinavian Airlines ?
$585
London Heathrow
Washington DC
Outbound
10/18/25
1 Stopover (CPH)
SK0502, SK0925
14h 39min
Return
11/17/25
1 Stopover (CPH)
SK0926, SK1517
16h 10min
SAS Scandinavian Airlines ?
$589
London Heathrow
Washington DC
Outbound
10/18/25
1 Stopover (CPH)
SK0502, SK0925
14h 39min
Return
11/17/25
1 Stopover (CPH)
SK0926, SK1517
16h 10min
SAS Scandinavian Airlines
$590
London Heathrow
Washington DC
Outbound
10/18/25
1 Stopover (CPH)
SK0502, SK0925
14h 39min
Return
11/17/25
1 Stopover (CPH)
SK0926, SK1517
16h 10min
SAS Scandinavian Airlines ?
$628
London Heathrow
Washington DC
Outbound
10/18/25
1 Stopover (CPH)
SK0502, SK0925
14h 39min
Return
11/17/25
1 Stopover (CPH)
SK0926, SK0505
14h 30min
SAS Scandinavian Airlines ?
$652
London Heathrow
Washington DC
Outbound
10/18/25
1 Stopover (LIS)
TP1363, TP0233
19h 05min
Return
11/17/25
1 Stopover (LIS)
TP0232, TP1366
24h 10min
TAP Air Portugal
$727
London Heathrow
Washington DC
Outbound
10/18/25
1 Stopover (VIE)
OS0456, OS0093
24h 05min
Return
11/17/25
1 Stopover (ORD)
OS7915, OS7854
13h 00min
Austrian Airlines ?
$801
London Heathrow
Washington DC
Outbound
10/18/25
1 Stopover (LIS)
TP1363, TP0233
19h 05min
Return
11/17/25
1 Stopover (LIS)
TP0232, TP1366
24h 10min
TAP Air Portugal ?
$1,713
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

Favorite airline: Aer Lingus
Flight tickets on the route London Heathrow – Washington DC are most frequently booked with Aer Lingus.
Aer Lingus
26 %
SAS
25 %
TAP Portugal
21 %
Cheapest weekday: Thursday
The cheapest flights on this route are operated on Thursday.
Direct flights are more expensive
Flights with a stopover are on average $270.00 cheaper than direct flights.
non stop flight
1 stop
08h 05min
24h 35min
$ 695
$ 425
Favourite connection: via Dublin
Flights with a stopover in Dublin are the most popular connection for this route.
Route
bookings
1 stopover Dublin
14h 20min, from $ 547
26 %
1 stopover Copenhagen
23h 55min, from $ 480
25 %
1 stopover Lisbon
24h 35min, from $ 425
21 %

Important flight information

Flight information: London Heathrow - Washington DC

Roundtrip from $ 559,55
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)
Departure country Flights from United Kingdom
Arrival airport Airport Washington DC - Dulles International Airport, DC (IAD)
Destination country Flights to United States
Alternative routes to United States
Flight destinations with a similar price