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
02/02/26
1 Stopover (KEF)
FI0451, FI0645
11h 15min
Return
16/02/26
1 Stopover (KEF)
FI0644, FI0450
10h 10min
Icelandair
£325
Best option
London
Washington-DC
Outbound
25/12/25
direct
LH9260
08h 30min
Return
13/01/26
direct
OS7806
07h 20min
Lufthansa ?
£490
London
Washington-DC
Please note: transfer for connecting flight
Outbound
31/01/26
1 Stopover (CDG)
U28411, AF0050
14h 25min
Return
03/02/26
1 Stopover (DUB)
EI0116, FR0112
10h 15min
easyJet, Air France
£1,631
London
Washington-DC
Outbound
02/02/26
1 Stopover (KEF)
FI0451, FI0645
11h 15min
Return
16/02/26
1 Stopover (KEF)
FI0644, FI0450
10h 10min
Icelandair
£329
London
Washington-DC
Outbound
02/02/26
1 Stopover (KEF)
FI0451, FI0645
11h 15min
Return
16/02/26
1 Stopover (KEF)
FI0644, FI0450
10h 10min
Icelandair
£336
London
Washington-DC
Outbound
02/02/26
1 Stopover (KEF)
FI0451, FI0645
11h 15min
Return
16/02/26
1 Stopover (KEF)
FI0644, FI0450
10h 10min
Icelandair
£345
London
Washington-DC
Outbound
20/03/26
1 Stopover (LIS)
TP1363, TP0233
20h 00min
Return
17/04/26
1 Stopover (LIS)
TP0232, TP1364
20h 45min
TAP Air Portugal
£388
London
Washington-DC
Outbound
20/03/26
1 Stopover (LIS)
TP1363, TP0233
20h 00min
Return
17/04/26
1 Stopover (LIS)
TP0232, TP1356
12h 15min
TAP Air Portugal ?
£394
London
Washington-DC
Outbound
02/02/26
1 Stopover (KEF)
FI0451, FI0645
11h 15min
Return
16/02/26
1 Stopover (KEF)
FI0644, FI0450
10h 10min
Icelandair ?
£397
London
Washington-DC
Outbound
31/01/26
1 Stopover (LIS)
TP1363, TP0231
14h 15min
Return
03/02/26
1 Stopover (LIS)
TP0232, TP1366
24h 10min
TAP Air Portugal
£407
Prices based on recent searches, subject to last-minute changes
Page 1 / 5

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

Outbound and return from 324,99 £
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