Cheapest return flights from London to Washington in December from 594€

Best time to book flights for London (LON) to Washington (IAD) flights at AirHint

AirHint found the following cheapest return flights from London (LON) to Washington (IAD) in December 2025 (see full year).

Return flights

01 Dec - 08 Dec Icelandair
03 Dec - 07 Dec Scandinavian Airlines
26 Dec - 11 Jan TAP
28 Dec - 11 Jan TAP
27 Dec - 11 Jan TAP
20 Dec - 09 Jan TAP
08 Dec - 21 Dec Icelandair
27 Dec - 10 Jan TAP
18 Dec - 09 Jan TAP
19 Dec - 31 Dec TAP
14 Dec - 30 Dec TAP
19 Dec - 30 Dec TAP
19 Dec - 26 Dec TAP
22 Dec - 29 Dec TAP
25 Dec - 17 Jan TAP
06 Dec - 19 Dec Icelandair
12 Dec - 17 Dec Icelandair
22 Dec - 02 Jan TAP
20 Dec - 04 Jan TAP
26 Dec - 02 Jan TAP

Also check the deals for one-way flights from London to Washington in December.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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