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

Return flights

24 Dec - 13 Jan	Viva
14 Dec - 31 Dec	Viva
24 Dec - 11 Jan	Viva	direct
24 Dec - 14 Jan	Viva	direct
12 Dec - 31 Dec	Viva
11 Dec - 31 Dec	Viva
17 Dec - 31 Dec	Viva
15 Dec - 31 Dec	Viva
16 Dec - 31 Dec	Viva
24 Dec - 10 Jan	Viva
01 Dec - 02 Dec	Viva	direct
24 Dec - 07 Jan	Viva	direct
14 Dec - 01 Jan	Viva	direct
23 Dec - 13 Jan	Viva
03 Dec - 21 Jan	United
09 Dec - 19 Jan	United
12 Dec - 01 Jan	Viva	direct
24 Dec - 31 Dec	Viva
04 Dec - 09 Dec	Viva
14 Dec - 31 Dec	Viva	direct

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 $216

Return flights