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
Washington DC
London Heathrow
Outbound
04/03/26
1 Stopover (YYZ)
AC8787, AC0858
12h 00min
Return
04/16/26
1 Stopover (YUL)
AC0867, AC8821
29h 49min
Air Canada ?
$668
Best option
Washington DC
London Heathrow
Outbound
02/13/26
1 Stopover (JFK)
AY4254, AY3774
09h 35min
Return
02/26/26
1 Stopover (JFK)
AY3777, AY4119
12h 00min
Finnair
$703
Washington DC
London Heathrow
Outbound
04/03/26
2 Stopovers (YOW, YUL)
AC8870, AC8006, AC0866
36h 35min
Return
04/16/26
2 Stopovers (ZRH, YUL)
AC6828, AC6821, AC8821
49h 34min
Air Canada
$677
Washington DC
London Heathrow
Outbound
04/03/26
1 Stopover (YYZ)
UA8555, UA8306
18h 36min
Return
04/16/26
1 Stopover (YUL)
UA8035, UA8372
10h 54min
United Airlines ?
$705
Washington DC
London Heathrow
Outbound
04/03/26
1 Stopover (JFK)
AY4254, AY5478
19h 46min
Return
04/16/26
1 Stopover (JFK)
AY3775, AY4119
13h 23min
Finnair
$779
Washington DC
London Heathrow
Outbound
04/03/26
1 Stopover (YYZ)
AC8781, AC0854
18h 36min
Return
04/16/26
1 Stopover (YOW)
AC0889, AC8869
27h 01min
Air Canada ?
$782
Washington DC
London Heathrow
Outbound
02/13/26
1 Stopover (EWR)
UA4515, UA0122
09h 20min
Return
02/26/26
1 Stopover (YUL)
AC0865, AC8825
13h 31min
United Airlines ?
$787
Washington DC
London Heathrow
Outbound
02/13/26
2 Stopovers (EWR, DUB)
UA4401, LH7976, BA0835
21h 45min
Return
02/26/26
2 Stopovers (AMS, PHL)
BA0430, AA0203, AA5244
18h 05min
United Airlines, Lufthansa, British Airways ?
$1,273
Washington DC
London Heathrow
Outbound
04/03/26
4 Stopovers (EWR, MUC, WRO, WAW)
UA4413, LH0413, LH1630, LO3848, LO0285
25h 00min
Return
04/16/26
2 Stopovers (DUB, JFK)
BA0824, EI0107, EI2587
21h 37min
United Airlines, Lufthansa, Polskie Linie Lotnicze LOT ?
$1,365
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 $667.40
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
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