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

Return flights

10 Dec - 17 Dec	Aeromexico	direct
15 Dec - 15 Jan	Delta
04 Dec - 08 Dec	Aeromexico	direct
06 Dec - 13 Dec	Delta
30 Dec - 06 Jan	American Airlines
29 Dec - 06 Jan	American Airlines
30 Dec - 05 Jan	Delta	direct
30 Dec - 06 Jan	Delta	direct
29 Dec - 06 Jan	Delta	direct
06 Dec - 13 Dec	Aeromexico	direct
24 Dec - 28 Dec	Delta
26 Dec - 29 Dec	Delta	direct
21 Dec - 26 Dec	American Airlines
21 Dec - 26 Dec	Delta	direct
27 Dec - 03 Jan	Sun Country Airlines
15 Dec - 02 Jan	jetBlue
25 Dec - 01 Jan	Aeromexico	direct
27 Dec - 03 Jan	Aeromexico	direct

Also check the deals for one-way flights from Atlanta 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 Atlanta to Cancun in December from $449

Return flights