Flight Routes from Washington DC to London Heathrow

Trip type

Our cheapest offers for flights from Washington DC to London Heathrow

Here you can compare cheap flights from Washington DC (IAD) 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
06/25/26
2 Stopovers (DUB, MAN)
EI0116, EI3320, BA1369
19h 45min
Return
06/30/26
2 Stopovers (OTP, LHR)
BA0878, AA7192, AA7002
29h 15min
Aer Lingus Irish Airlines, British Airways ?
$1,084
Best option
Washington DC
London Heathrow
Outbound
06/28/26
direct
OS7808
07h 25min
Return
07/03/26
direct
OS7807
08h 20min
Austrian Airlines ?
$1,448
Washington DC
London Heathrow
Outbound
06/25/26
1 Stopover (YUL)
UA8085, UA8068
13h 15min
Return
06/30/26
1 Stopover (ZRH)
UA9761, UA9754
13h 00min
United Airlines
$1,156
Washington DC
London Heathrow
Outbound
06/25/26
1 Stopover (CPH)
SK0926, SK0505
14h 40min
Return
06/30/26
1 Stopover (CPH)
SK1508, SK0925
26h 30min
SAS Scandinavian Airlines ?
$1,163
Washington DC
London Heathrow
Outbound
06/25/26
1 Stopover (DUB)
EI0116, EI0152
09h 50min
Return
06/30/26
1 Stopover (DUB)
EI0153, EI0117
11h 55min
Aer Lingus Irish Airlines ?
$1,218
Washington DC
London Heathrow
Outbound
06/25/26
1 Stopover (AMS)
VS7120, VS7059
10h 20min
Return
06/30/26
1 Stopover (CDG)
VS6661, VS6758
13h 05min
Virgin Atlantic Airways ?
$1,249
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: Aer Lingus
Aer Lingus is the most popular airline for flights from Washington DC to London Heathrow.
Aer Lingus
30 %
Icelandair
24 %
British Airways
17 %
Cheapest weekday: Thursday
Compared to other weekdays, flights are cheapest on Thursday.
Stopover flights are the cheapest connection
Compared to flights with a stopover, direct flights are $129.00 more expensive on this route.
non stop flight
1 stop
2 stops
07h 20min
18h 45min
21h 40min
$562
$433
$599
Favourite connection: via Dublin
When booking flights from Washington DC to London Heathrow 33 % of travelers prefer to fly via Dublin.
Route
bookings
1 stopover Dublin
11h 00min, from $442
33 %
1 stopover Reykjavik-Keflavik International
18h 45min, from $433
27 %
Direct flights
07h 20min, from $562
22 %

Important flight information

Flight information: Washington DC - London Heathrow

Roundtrip from $1,083.64
Flight duration min. 07:00 / max. 07:25
Return flight duration min. 08:20/ max. 08:45
Distance 5908 km
Flights per week 52
Departure airport Airport Washington DC - Dulles International Airport, DC (IAD)
Arrival airport Airport London Heathrow (LHR)
Destination country Flights to United Kingdom
Alternative flights to London Heathrow
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