Cheapest return flights from Chicago to London in December from $446

AirHint found the following cheapest return flights from Chicago (ORD) to London (LHR) in December 2025 (see full year).

Return flights

05 Dec - 07 Dec Scandinavian Airlines
10 Dec - 11 Jan Icelandair
03 Dec - 09 Dec Icelandair
03 Dec - 10 Dec Icelandair
03 Dec - 12 Dec Icelandair
01 Dec - 10 Dec Icelandair
02 Dec - 13 Dec Icelandair
01 Dec - 05 Dec Icelandair
05 Dec - 23 Dec Scandinavian Airlines
11 Dec - 10 Jan Icelandair
05 Dec - 10 Dec Scandinavian Airlines
11 Dec - 17 Dec Icelandair
30 Dec - 24 Jan Icelandair
30 Dec - 09 Jan Icelandair
29 Dec - 24 Jan Icelandair
29 Dec - 11 Jan Icelandair
30 Dec - 14 Jan Icelandair
31 Dec - 18 Jan Scandinavian Airlines
15 Dec - 15 Jan Scandinavian Airlines
29 Dec - 19 Jan Icelandair

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

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