Cheapest return flights from Chicago to London in December from 569€

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

Return flights

12 Dec - 11 Jan Frontier Airlines
11 Dec - 10 Jan Frontier Airlines
11 Dec - 15 Dec Frontier Airlines
25 Dec - 11 Jan Frontier Airlines
14 Dec - 17 Dec Frontier Airlines
11 Dec - 13 Dec Frontier Airlines
07 Dec - 16 Dec Frontier Airlines
15 Dec - 15 Jan Frontier Airlines
12 Dec - 28 Dec Frontier Airlines
21 Dec - 10 Jan Frontier Airlines
19 Dec - 11 Jan Frontier Airlines
13 Dec - 15 Dec Porter Airlines (Canada) Ltd
14 Dec - 26 Dec Frontier Airlines
29 Dec - 11 Jan Frontier Airlines
14 Dec - 21 Dec Frontier Airlines
18 Dec - 26 Dec Frontier Airlines
21 Dec - 28 Dec Frontier Airlines
28 Dec - 09 Jan Frontier Airlines
27 Dec - 04 Jan Frontier Airlines
27 Dec - 03 Jan Frontier Airlines

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

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