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

Return flights

05 Dec - 11 Dec	Arajet
01 Dec - 30 Dec	Arajet
01 Dec - 07 Dec	Arajet
01 Dec - 14 Dec	Arajet
12 Dec - 18 Dec	Arajet
07 Dec - 16 Dec	Avianca
06 Dec - 16 Dec	Avianca
03 Dec - 10 Dec	Arajet
15 Dec - 22 Dec	Arajet
11 Dec - 26 Dec	Copa
31 Dec - 15 Jan	Arajet
31 Dec - 10 Jan	Arajet
31 Dec - 21 Jan	Arajet
24 Dec - 08 Jan	Arajet
23 Dec - 01 Jan	Avianca
24 Dec - 07 Jan	GOL Linhas Aéreas
25 Dec - 07 Jan	GOL Linhas Aéreas
25 Dec - 06 Jan	GOL Linhas Aéreas
24 Dec - 03 Jan	Arajet
30 Dec - 10 Jan	Arajet

Also check the deals for one-way flights from Sao Paulo 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 Sao Paulo to Cancun in December from $428

Return flights