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

Return flights

13 Dec - 05 Jan	Aeromexico
14 Dec - 11 Jan	Volaris	direct
04 Dec - 29 Jan	Volaris	direct
18 Dec - 11 Jan	Volaris	direct
12 Dec - 21 Dec	Aeromexico	direct
13 Dec - 04 Jan	Aeromexico	direct
04 Dec - 07 Dec	United
17 Dec - 26 Jan	United
05 Dec - 07 Dec	United
03 Dec - 07 Dec	United
24 Dec - 11 Jan	Delta	direct
16 Dec - 08 Jan	United
09 Dec - 28 Dec	Viva
24 Dec - 13 Jan	Viva
07 Dec - 28 Dec	Viva
24 Dec - 31 Dec	United
08 Dec - 28 Dec	Viva
17 Dec - 26 Jan	Volaris	direct
18 Dec - 31 Dec	United
10 Dec - 28 Dec	Viva

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

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 Mexico City to Chicago in December from 163€

Return flights