Flights from London Gatwick to Washington DC

Our cheapest offers for flights from London Gatwick to Washington DC

Here you can compare cheap flights from London Gatwick (LGW) to Washington DC (IAD) 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 Gatwick
Washington DC
Outbound
11/12/25
1 Stopover (KEF)
FI0471, FI0645
11h 25min
Return
-
Icelandair
£487
Best option
London Gatwick
Washington DC
Outbound
25/11/25
1 Stopover (KEF)
FI0471, FI0645
11h 25min
Return
30/11/25
1 Stopover (KEF)
FI0644, FI0470
10h 15min
Icelandair
£357
London Gatwick
Washington DC
Outbound
25/11/25
1 Stopover (KEF)
FI0471, FI0645
11h 25min
Return
30/11/25
1 Stopover (KEF)
FI0644, FI0470
10h 15min
Icelandair
£363
London Gatwick
Washington DC
Outbound
25/11/25
1 Stopover (KEF)
FI0471, FI0645
11h 25min
Return
30/11/25
1 Stopover (KEF)
FI0644, FI0470
10h 15min
Icelandair
£371
London Gatwick
Washington DC
Outbound
25/11/25
1 Stopover (KEF)
FI0471, FI0645
11h 25min
Return
02/12/25
1 Stopover (KEF)
FI0644, FI0470
10h 15min
Icelandair ?
£373
London Gatwick
Washington DC
Outbound
25/11/25
1 Stopover (KEF)
FI0471, FI0645
11h 25min
Return
30/11/25
1 Stopover (KEF)
FI0644, FI0470
10h 15min
Icelandair
£387
London Gatwick
Washington DC
Outbound
25/11/25
1 Stopover (KEF)
FI0471, FI0645
11h 25min
Return
02/12/25
1 Stopover (KEF)
FI0644, FI0470
10h 15min
Icelandair
£400
London Gatwick
Washington DC
Outbound
20/10/25
1 Stopover (KEF)
FI0473, FI0645
32h 40min
Return
11/11/25
1 Stopover (KEF)
FI0644, FI0470
10h 15min
Icelandair
£461
London Gatwick
Washington DC
Outbound
08/12/25
1 Stopover (JFK, EWR)
Z00701, UA1950
15h 21min
Return
24/12/25
1 Stopover (EWR, JFK)
UA2190, Z00702
16h 40min
Norse Atlantic UK, United Airlines
£466
London Gatwick
Washington DC
Outbound
20/10/25
1 Stopover (KEF)
FI0473, FI0645
32h 40min
Return
11/11/25
1 Stopover (KEF)
FI0644, FI0470
10h 15min
Icelandair
£481
Prices based on recent searches, subject to last-minute changes
Page 1 / 2

Tips and tricks to help you find cheap flights from London Gatwick to Washington DC

Favourite airline: Icelandair
The favourite airline for flights from London Gatwick to Washington DC is Icelandair.
Icelandair
94 %
TAP Portugal
6 %
Favourite connection: via Reykjavik-Keflavik
The most popular flights on this route are via Reykjavik-Keflavik and are booked by 94 % of all travellers.
Route
bookings
1 stopover Reykjavik-Keflavik International
11h 15min, from 545 £
94 %
1 stopover Lisbon
13h 15min, from 774 £
6 %

Important flight information

Flight information: London Gatwick - Washington DC

Cheapest outbound flight from 486,97 £
Outbound and return from 356,99 £
Distance 5938 km
Departure airport Airport London Gatwick (LGW)
Arrival airport Airport Washington DC - Dulles International Airport, DC (IAD)
Destination country Flights to United States
Alternative routes to United States
Alternative flights to Washington DC
Popular destinations for onward travel
Flight destinations with a similar price