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
11/09/25
1 Stopover (YUL)
AC8824, AC0864
10h 00min
Return
12/07/25
1 Stopover (YUL)
AC0865, AC8821
26h 01min
Air Canada ?
$615
Best option
Washington DC
London Heathrow
Outbound
11/09/25
1 Stopover (EWR)
UA4414, UA0904
11h 10min
Return
12/07/25
1 Stopover (YUL)
UA8297, UA8366
13h 31min
United Airlines ?
$628
Washington DC
London Heathrow
Outbound
11/09/25
1 Stopover (JFK)
AY4104, AY3774
10h 55min
Return
12/07/25
1 Stopover (JFK)
AY5515, B61887
13h 44min
Finnair
$932
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
11/09/25
1 Stopover (EWR)
UA4174, UA0146
09h 55min
Return
12/07/25
1 Stopover (YUL)
AC0865, AC8825
13h 31min
United Airlines ?
$706
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
11/09/25
1 Stopover (EWR)
UA4591, IB3568
16h 25min
Return
12/07/25
2 Stopovers (DUB, BOS)
BA0826, EI0137, EI2392
14h 45min
United Airlines, Iberia ?
$1,153
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
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 $ 614,40
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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