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

Return flights

18 Jan - 20 Jan	Air Canada
10 Jan - 14 Jan	jetBlue
11 Jan - 27 Jan	jetBlue
19 Jan - 26 Jan	jetBlue
18 Jan - 25 Jan	jetBlue
25 Jan - 01 Feb	jetBlue
08 Jan - 14 Jan	jetBlue
07 Jan - 15 Jan	Icelandair
12 Jan - 21 Jan	Icelandair
12 Jan - 19 Jan	Scandinavian Airlines
09 Jan - 22 Jan	Icelandair
02 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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Washington to London in January from 514€

Return flights