Flights from London to Washington DC

Our cheapest offers for flights from London to Washington DC

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

Outbound Return Airlines Shop Baggage Price
London
Washington-DC
Outbound
11/12/25
1 Stopover (KEF)
FI0471, FI0645
11h 25min
Return
-
Icelandair
£487
London
Washington-DC
Outbound
19/02/26
1 Stopover (KEF)
FI0471, FI0645
11h 35min
Return
22/02/26
1 Stopover (KEF)
FI0644, FI0470
10h 15min
Icelandair
£341
Best option
London
Washington-DC
Outbound
19/02/26
direct
BA0217
08h 25min
Return
22/02/26
direct
BA0216
07h 10min
British Airways
£411
London
Washington-DC
Outbound
19/02/26
1 Stopover (IST)
TK1930, TK0007
17h 50min
Return
22/02/26
1 Stopover (IST)
TK0008, TK1929
20h 25min
Turkish Airlines
£703
London
Washington-DC
Outbound
19/02/26
1 Stopover (KEF)
FI0471, FI0645
11h 35min
Return
22/02/26
1 Stopover (KEF)
FI0644, FI0470
10h 15min
Icelandair
£345
London
Washington-DC
Outbound
19/02/26
1 Stopover (KEF)
FI0471, FI0645
11h 35min
Return
22/02/26
1 Stopover (KEF)
FI0644, FI0470
10h 15min
Icelandair ?
£349
London
Washington-DC
Outbound
04/11/25
1 Stopover (KEF)
FI0471, FI0645
11h 35min
Return
03/12/25
1 Stopover (KEF)
FI0644, FI0470
10h 15min
Icelandair
£358
London
Washington-DC
Outbound
19/02/26
1 Stopover (KEF)
FI0471, FI0645
11h 35min
Return
22/02/26
1 Stopover (KEF)
FI0644, FI0470
10h 15min
Icelandair
£368
London
Washington-DC
Outbound
04/11/25
1 Stopover (DUB)
EI0153, EI0117
11h 45min
Return
03/12/25
1 Stopover (DUB)
EI0116, EI0154
11h 00min
Aer Lingus Irish Airlines
£378
London
Washington-DC
Outbound
19/02/26
1 Stopover (ZRH)
LX0433, UA0053
25h 50min
Return
22/02/26
1 Stopover (ZRH)
LX3201, LX0432
19h 25min
Swiss International Air Lines, United Airlines
£391
Prices based on recent searches, subject to last-minute changes
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Tips and tricks to help you find cheap flights from London to Washington DC

Favourite airline: Icelandair
Flight tickets on the route London – Washington-DC are most frequently booked with Icelandair.
Icelandair
28 %
Aer Lingus
25 %
TAP Portugal
21 %
Cheapest weekday: Sunday
The cheapest days to fly on this route are Sunday.
Stopover flights are the cheapest connection
On this route, direct flights are £183.00 more expensive than flights with a stopover.
non stop flight
1 stop
2 stops
08h 05min
15h 25min
31h 33min
£655
£472
£1,151
Favourite connection: via Reykjavik-Keflavik
Flights with a stopover in Reykjavik-Keflavik are the most popular connection for this route.
Route
bookings
1 stopover Reykjavik-Keflavik International
15h 25min, from £472
29 %
1 stopover Dublin
13h 55min, from £652
27 %
1 stopover Lisbon
12h 25min, from £540
23 %

Important flight information

Flight information: London - Washington-DC

Cheapest outbound flight from £486.97
Outbound and return from £340.99
Flight duration min. 08:20 / max. 08:45
Return flight duration min. 07:00/ max. 08:22
Distance 5903 km
Flights per week 52
Departure airport Airport London (LCY, LGW, LHR, LTN, STN, SEN) (LON)
Arrival airport Airport Washington-DC (WAS)
Destination country Flights to United States
Alternative routes to United States
Flight destinations with a similar price