AirHint found the following cheapest return flights from Chicago (MDW) to Mexico City (MEX) in January 2026 (see full year).

Return flights

23 Jan - 30 Jan	Frontier Airlines
23 Jan - 02 Feb	Frontier Airlines
30 Jan - 02 Feb	Frontier Airlines
17 Jan - 21 Jan	Aeromexico
29 Jan - 01 Feb	Aeromexico
22 Jan - 31 Jan	Aeromexico
31 Jan - 03 Feb	Aeromexico
14 Jan - 17 Jan	Aeromexico
14 Jan - 20 Jan	Aeromexico
16 Jan - 01 Feb	Aeromexico
24 Jan - 31 Jan	Aeromexico
17 Jan - 01 Feb	Aeromexico
31 Jan - 21 Feb	Aeromexico
23 Jan - 31 Jan	Aeromexico
31 Jan - 08 Feb	Aeromexico
29 Jan - 28 Feb	Aeromexico
15 Jan - 19 Jan	Frontier Airlines
18 Jan - 22 Jan	Aeromexico
23 Jan - 01 Feb	Aeromexico
20 Jan - 22 Jan	Aeromexico

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

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 Chicago to Mexico City in January from $340

Return flights