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

Return flights

03 Dec - 06 Dec	Spirit Airlines	direct
06 Dec - 09 Dec	Spirit Airlines
06 Dec - 10 Dec	Spirit Airlines
08 Dec - 10 Dec	Spirit Airlines
08 Dec - 09 Dec	Spirit Airlines
01 Dec - 03 Dec	Spirit Airlines	direct
05 Dec - 06 Dec	Spirit Airlines	direct
02 Dec - 03 Dec	Spirit Airlines	direct
02 Dec - 06 Dec	Spirit Airlines	direct
06 Dec - 22 Dec	Spirit Airlines	direct
29 Dec - 08 Jan	Delta
29 Dec - 18 Jan	Viva
12 Dec - 11 Jan	Aeromexico
28 Dec - 18 Jan	Viva
29 Dec - 15 Jan	Viva
28 Dec - 15 Jan	Viva
29 Dec - 10 Jan	Viva
28 Dec - 10 Jan	Viva
28 Dec - 08 Jan	Viva
27 Dec - 15 Jan	Viva

Also check the deals for one-way flights from Chicago to Cancun 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 Cancun in December from $229

Return flights