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

Return flights

14 Jan - 17 Jan	TAP
16 Jan - 22 Jan	TAP
16 Jan - 24 Jan	TAP
23 Jan - 31 Jan	TAP
14 Jan - 31 Jan	TAP
23 Jan - 20 Feb	TAP
23 Jan - 01 Feb	TAP
31 Jan - 01 Feb	Scandinavian Airlines
31 Jan - 02 Feb	Scandinavian Airlines
24 Jan - 26 Jan	Scandinavian Airlines
26 Jan - 30 Jan	Icelandair
24 Jan - 31 Jan	Icelandair
24 Jan - 10 Feb	Icelandair
30 Jan - 07 Feb	Icelandair
26 Jan - 28 Feb	Icelandair
27 Jan - 02 Feb	Icelandair
26 Jan - 07 Feb	Icelandair
29 Jan - 02 Feb	Icelandair
23 Jan - 25 Jan	Scandinavian Airlines
14 Jan - 23 Jan	TAP

Also check the deals for one-way flights from Chicago 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 Chicago to London in January from $423

Return flights