Cheapest return flights from Chicago to London in December from 621€

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

Return flights

22 Dec - 29 Dec Lufthansa
22 Dec - 02 Jan Lufthansa
20 Dec - 23 Dec TAP
22 Dec - 29 Dec Austrian Airlines direct
19 Dec - 30 Dec Delta
21 Dec - 03 Jan Lufthansa
20 Dec - 23 Dec British Airways direct
19 Dec - 01 Jan Iberia
19 Dec - 30 Dec British Airways direct
21 Dec - 03 Jan Brussels Airlines direct
19 Dec - 01 Jan Brussels Airlines direct

Also check the deals for one-way flights from Chicago to London in December.

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