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
09/25/25
1 Stopover (JFK)
AY4254, AY4016
10h 42min
Return
10/05/25
1 Stopover (JFK)
AY4017, AY4119
11h 07min
Finnair
$701
Washington DC
London Heathrow
Outbound
09/25/25
2 Stopovers (BOS, FRA)
B62454, DE2039, LH0900
15h 55min
Return
10/05/25
2 Stopovers (FRA, BOS)
LH0923, DE2038, B61955
15h 30min
JetBlue Airways, Condor, Lufthansa
$1,380
Washington DC
London Heathrow
Outbound
09/25/25
1 Stopover (JFK)
BA1859, BA1515
10h 42min
Return
10/05/25
1 Stopover (JFK)
BA1510, BA6580
11h 07min
British Airways
$702
Washington DC
London Heathrow
Outbound
09/25/25
1 Stopover (EWR)
UA4446, UA0110
13h 52min
Return
10/05/25
1 Stopover (YUL)
UA8035, UA8372
11h 21min
United Airlines ?
$703
Washington DC
London Heathrow
Outbound
09/25/25
1 Stopover (JFK)
AY4254, AY4016
10h 42min
Return
10/05/25
1 Stopover (JFK)
AY4017, AY4119
11h 07min
Finnair ?
$706
Washington DC
London Heathrow
Outbound
09/25/25
1 Stopover (JFK)
BA1859, BA1515
10h 42min
Return
10/05/25
1 Stopover (JFK)
BA1510, BA6580
11h 07min
British Airways
$717
Washington DC
London Heathrow
Outbound
09/25/25
1 Stopover (BOS)
IB4349, IB4027
13h 17min
Return
10/05/25
1 Stopover (JFK)
IB4223, IB4109
11h 07min
Iberia ?
$721
Washington DC
London Heathrow
Outbound
09/25/25
1 Stopover (EWR)
UA4446, UA0110
13h 52min
Return
10/05/25
1 Stopover (YUL)
AC0865, AC8825
12h 46min
United Airlines ?
$814
Washington DC
London Heathrow
Outbound
09/25/25
1 Stopover (EWR, JFK)
UA4591, BA1594
31h 40min
Return
10/05/25
2 Stopovers (DUB, JFK)
EI0153, EI0107, AA4538
28h 00min
United Airlines, British Airways ?
$1,330
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 $ 700,91
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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