AirHint found the following cheapest return flights from Mexico City (MEX) to San Juan (SJU) in December 2025 (see full year).

Return flights

13 Dec - 20 Dec	Arajet
06 Dec - 11 Dec	Arajet
30 Dec - 14 Jan	Copa
03 Dec - 07 Dec	Avianca
05 Dec - 13 Dec	Volaris
03 Dec - 06 Dec	Avianca
31 Dec - 15 Jan	Avianca
04 Dec - 07 Dec	Avianca
20 Dec - 30 Dec	Copa
11 Dec - 21 Dec	Copa
12 Dec - 21 Dec	Copa
28 Dec - 06 Jan	Copa
27 Dec - 04 Jan	Copa
17 Dec - 04 Jan	Copa
21 Dec - 04 Jan	Copa
20 Dec - 31 Dec	Copa
30 Dec - 08 Jan	Copa
20 Dec - 04 Jan	Copa
25 Dec - 04 Jan	Copa
26 Dec - 18 Jan	Copa

Also check the deals for one-way flights from Mexico City to San Juan 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.

Book a cheap hotel in San Juan

Cheap car rent in San Juan

Cheapest return flights from Mexico City to San Juan in December from $415

Return flights