Flights from Washington DC to London Heathrow

Our cheapest offers for flights from Washington DC to London Heathrow

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

Outbound Return Airlines Shop Baggage Price
Best option
Washington DC
London Heathrow
Outbound
04/02/25
1 Stopover (BOS)
B62554, B61620
10h 10min
Return
04/09/25
1 Stopover (BOS)
B61621, B61055
11h 16min
JetBlue Airways ?
$480
Washington DC
London Heathrow
Outbound
03/01/25
1 Stopover (BOS)
B61154, B61620
15h 26min
Return
03/09/25
1 Stopover (BOS)
B61621, B61355
12h 05min
JetBlue Airways ?
$508
Washington DC
London Heathrow
Outbound
03/29/25
1 Stopover (YYZ)
AC8789, AC0854
28h 55min
Return
04/19/25
1 Stopover (YOW)
AC0889, AC8869
28h 21min
Air Canada
$647
Washington DC
London Heathrow
Outbound
03/31/25
1 Stopover (YUL)
AC8824, AC0864
12h 50min
Return
04/19/25
2 Stopovers (MUC, YYZ)
AC2485, AC0837, AC8784
15h 38min
Air Canada
$657
Washington DC
London Heathrow
Outbound
05/04/25
1 Stopover (YUL)
AC8824, AC0864
12h 25min
Return
05/18/25
1 Stopover (YUL)
AC0865, AC8825
12h 03min
Air Canada ?
$692
Washington DC
London Heathrow
Outbound
04/04/25
1 Stopover (EWR)
UA4408, UA0110
15h 00min
Return
04/19/25
1 Stopover (YUL)
UA8035, UA8372
10h 54min
United Airlines ?
$705
Washington DC
London Heathrow
Outbound
03/31/25
1 Stopover (EWR)
UA4560, UA0016
10h 45min
Return
04/19/25
1 Stopover (YUL)
UA8297, UA8366
12h 03min
United Airlines ?
$712
Washington DC
London Heathrow
Outbound
03/02/25
1 Stopover (EWR)
UA4414, UA0904
10h 25min
Return
03/07/25
2 Stopovers (MUC, ORD)
LH2485, UA0952, UA2605
17h 22min
United Airlines ?
$817
Washington DC
London Heathrow
Outbound
03/02/25
2 Stopovers (YUL, YYZ)
AC8820, AC0407, AC0854
19h 30min
Return
03/07/25
2 Stopovers (BRU, YUL)
SN2104, AC0833, AC8823
13h 39min
Air Canada
$837
Washington DC
London Heathrow
Outbound
03/02/25
2 Stopovers (YUL, YYZ)
AC8820, AC0407, AC0854
19h 30min
Return
03/07/25
2 Stopovers (BRU, YUL)
SN2104, AC0833, AC8823
13h 39min
Air Canada
$839
Prices based on recent searches, subject to last-minute changes
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Tips and tricks to help you find cheap flights from Washington DC to London Heathrow

Favorite airline: United Airlines
The favorite airline for flights from Washington DC to London Heathrow is United Airlines.
United Airlines
31 %
Air Canada
23 %
Finnair
23 %
Cheapest weekday: Monday
The cheapest day of departure is Monday. You can save up to 49 % when you fly on these days of the week.
Favourite connection: via New York
Flights with a stopover in New York are the most popular connection for this route.
Route
bookings
1 stopover New York - John F. Kennedy International Airport, NY
10h 35min, from $608
40 %
1 stopover New York - Newark Liberty International Airport, NJ
09h 40min, from $546
30 %
1 stopover Toronto - Lester B. Pearson International Airport
32h 20min, from $637
20 %

Important flight information

Flight information: Washington DC - London Heathrow

Roundtrip from $479.92
Flight duration min. 08:22
Distance 5887 km
Flights per week 1
Departure airport Airport Washington DC - Ronald Reagan National Airport, VA (DCA)
Arrival airport Airport London Heathrow (LHR)
Destination country Flights to United Kingdom
Alternative flights to London Heathrow
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