Cheapest return flights from Washington to London in January from $446

Best time to book flights for Washington (IAD) to London (LHR) flights at AirHint

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

Return flights

19 Jan - 26 Jan Scandinavian Airlines
20 Jan - 27 Jan Scandinavian Airlines
21 Jan - 28 Jan Scandinavian Airlines
26 Jan - 02 Feb Scandinavian Airlines
27 Jan - 03 Feb Scandinavian Airlines
28 Jan - 04 Feb Scandinavian Airlines
25 Jan - 01 Feb Scandinavian Airlines
18 Jan - 25 Jan Scandinavian Airlines
22 Jan - 29 Jan Scandinavian Airlines
29 Jan - 05 Feb Scandinavian Airlines
16 Jan - 23 Jan Scandinavian Airlines
17 Jan - 24 Jan Scandinavian Airlines
23 Jan - 30 Jan Scandinavian Airlines
24 Jan - 31 Jan Scandinavian Airlines
30 Jan - 06 Feb Scandinavian Airlines
31 Jan - 07 Feb Scandinavian Airlines
14 Jan - 21 Jan TAP
27 Jan - 03 Feb British Airways direct
28 Jan - 04 Feb British Airways direct
25 Jan - 01 Feb British Airways direct

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

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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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