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
09/19/25
1 Stopover (CPH)
SK0502, SK0925
14h 39min
Return
09/29/25
1 Stopover (CPH)
SK0926, SK1517
14h 35min
SAS Scandinavian Airlines ?
$575
Best option
London Heathrow
Washington DC
Outbound
06/18/25
direct
LH9266
08h 20min
Return
07/15/25
direct
UA0918
07h 20min
Lufthansa ?
$886
London Heathrow
Washington DC
Outbound
09/19/25
1 Stopover (CPH)
SK0502, SK0925
14h 39min
Return
09/29/25
1 Stopover (CPH)
SK0926, SK1501
18h 35min
SAS Scandinavian Airlines
$581
London Heathrow
Washington DC
Outbound
09/19/25
1 Stopover (CPH)
SK1508, SK0925
29h 29min
Return
09/29/25
1 Stopover (CPH)
SK0926, SK0505
12h 55min
SAS Scandinavian Airlines ?
$588
London Heathrow
Washington DC
Outbound
09/19/25
1 Stopover (CPH)
SK1508, SK0925
29h 29min
Return
09/29/25
1 Stopover (CPH)
SK0926, SK0501
30h 15min
SAS Scandinavian Airlines ?
$610
London Heathrow
Washington DC
Outbound
09/19/25
1 Stopover (CPH)
SK0502, SK0925
14h 39min
Return
09/29/25
1 Stopover (CPH)
SK0926, SK1517
14h 35min
SAS Scandinavian Airlines ?
$615
London Heathrow
Washington DC
Outbound
09/19/25
1 Stopover (CPH)
SK0500, SK0925
18h 19min
Return
09/29/25
1 Stopover (CPH)
SK0926, SK0505
12h 55min
SAS Scandinavian Airlines ?
$621
London Heathrow
Washington DC
Outbound
09/19/25
1 Stopover (LIS)
TP1351, TP0231
12h 20min
Return
09/29/25
1 Stopover (LIS)
TP0232, TP1350
19h 00min
TAP Air Portugal
$634
London Heathrow
Washington DC
Outbound
09/19/25
1 Stopover (CPH)
SK0502, SK0925
14h 39min
Return
09/29/25
1 Stopover (CPH)
SK0926, SK0505
12h 55min
SAS Scandinavian Airlines ?
$686
London Heathrow
Washington DC
Outbound
06/18/25
1 Stopover (KEF)
FI0455, FI0649
29h 45min
Return
07/15/25
1 Stopover (KEF)
FI0648, FI0454
16h 05min
Icelandair ?
$702
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 $701.31
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
Flight destinations with a similar price