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

Return flights

19 Jan - 25 Jan	jetBlue
19 Jan - 02 Feb	jetBlue
21 Jan - 28 Jan	jetBlue
21 Jan - 26 Jan	jetBlue
22 Jan - 25 Jan	jetBlue
26 Jan - 02 Feb	jetBlue
23 Jan - 25 Jan	jetBlue
19 Jan - 01 Feb	jetBlue
12 Jan - 21 Jan	British Airways
27 Jan - 03 Feb	British Airways
20 Jan - 03 Feb	British Airways
21 Jan - 30 Jan	jetBlue
28 Jan - 02 Feb	jetBlue
13 Jan - 20 Jan	British Airways
25 Jan - 25 Feb	British Airways
17 Jan - 19 Jan	Air Canada
14 Jan - 19 Jan	Air Canada
29 Jan - 05 Feb	jetBlue
23 Jan - 01 Feb	Air Canada
31 Jan - 17 Feb	Air Canada

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 $530

Return flights