Cheapest return flights from Chicago to London in December from $545
AirHint found the following cheapest return flights from Chicago (MDW) to London (LGW)
in December 2025 (see full year ).
Return flights
02 Dec
- 09 Dec
Frontier Airlines
$ 545
04 Dec
- 09 Dec
Frontier Airlines
$ 546
25 Dec
- 17 Jan
Frontier Airlines
$ 673
27 Dec
- 17 Jan
Frontier Airlines
$ 690
07 Dec
- 13 Dec
Frontier Airlines
$ 731
30 Dec
- 07 Jan
Frontier Airlines
$ 767
05 Dec
- 23 Dec
Frontier Airlines
$ 784
23 Dec
- 11 Jan
Frontier Airlines
$ 822
14 Dec
- 18 Dec
Frontier Airlines
$ 832
27 Dec
- 12 Jan
Frontier Airlines
$ 837
09 Dec
- 02 Jan
Frontier Airlines
$ 948
18 Dec
- 06 Jan
Frontier Airlines
$ 993
23 Dec
- 07 Jan
Frontier Airlines
$ 1208
12 Dec
- 04 Jan
Southwest Airlines
$ 1719
18 Dec
- 28 Dec
Southwest Airlines
$ 1861
22 Dec
- 01 Jan
Southwest Airlines
$ 1892
19 Dec
- 21 Dec
Southwest Airlines
$ 2584
20 Dec
- 23 Dec
Southwest Airlines
$ 3012
Also check the deals for one-way flights from Chicago to London in December .
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