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

Return flights

13 Jan - 22 Jan	Air Canada
30 Jan - 03 Feb	jetBlue
18 Jan - 31 Jan	jetBlue
29 Jan - 03 Feb	jetBlue
13 Jan - 11 Feb	jetBlue
23 Jan - 30 Jan	Frontier Airlines
22 Jan - 29 Jan	Finnair
07 Jan - 11 Jan	jetBlue
07 Jan - 17 Jan	jetBlue
06 Jan - 18 Jan	jetBlue
06 Jan - 16 Jan	jetBlue
09 Jan - 11 Jan	jetBlue
16 Jan - 19 Jan	Iberia
31 Jan - 06 Feb	TAP
30 Jan - 06 Feb	TAP

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 440€

Return flights