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

Return flights

16 Jan - 19 Jan	Scandinavian Airlines
14 Jan - 11 Feb	TAP
06 Jan - 15 Jan	Aer Lingus
06 Jan - 16 Jan	Aer Lingus
20 Jan - 25 Jan	Icelandair
23 Jan - 25 Jan	United
21 Jan - 28 Jan	British Airways	direct
14 Jan - 11 Feb	British Airways	direct
11 Jan - 18 Jan	Icelandair
31 Jan - 07 Feb	Icelandair
26 Jan - 02 Feb	Icelandair
14 Jan - 07 Feb	Icelandair
12 Jan - 19 Jan	Icelandair
07 Jan - 12 Jan	Aer Lingus
06 Jan - 11 Jan	Aer Lingus
26 Jan - 02 Feb	British Airways	direct
31 Jan - 07 Feb	British Airways	direct

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 373€

Return flights