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

Return flights

11 Dec - 23 Jan	Frontier Airlines
19 Dec - 23 Jan	Frontier Airlines
14 Dec - 04 Jan	Frontier Airlines
28 Dec - 14 Jan	Delta
26 Dec - 03 Jan	Frontier Airlines
13 Dec - 04 Jan	Frontier Airlines
19 Dec - 09 Jan	Frontier Airlines
20 Dec - 03 Jan	Porter Airlines (Canada) Ltd
19 Dec - 04 Jan	Frontier Airlines
12 Dec - 09 Jan	Delta

Also check the deals for one-way flights from Chicago to Guadalajara 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 Chicago to Guadalajara in December from 522€

Return flights