AirHint found the following cheapest return flights from Washington (DCA) to London (LGW) in January 2026 (see full year).

Return flights

14 Jan - 20 Jan	Air Canada
09 Jan - 18 Jan	jetBlue
19 Jan - 29 Jan	Air Canada
14 Jan - 22 Jan	Icelandair
30 Jan - 09 Feb	Porter Airlines (Canada) Ltd
29 Jan - 09 Feb	Air Canada
11 Jan - 31 Jan	Icelandair
14 Jan - 25 Jan	Icelandair
15 Jan - 20 Jan	Icelandair
11 Jan - 19 Jan	Icelandair
14 Jan - 19 Jan	Icelandair
10 Jan - 31 Jan	Icelandair
24 Jan - 01 Feb	Icelandair

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

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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Cheapest return flights from Washington to London in January from 463€

Return flights