Cheapest return flights from Washington to London in January from $556

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

Return flights

29 Jan - 03 Feb TAP
29 Jan - 07 Feb TAP
29 Jan - 02 Feb TAP
29 Jan - 05 Feb TAP
30 Jan - 06 Feb TAP
30 Jan - 07 Feb TAP
30 Jan - 27 Feb TAP
30 Jan - 03 Feb TAP
31 Jan - 12 Feb TAP
31 Jan - 07 Feb TAP

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

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