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

Return flights

03 Oct - 13 Oct	Arajet
13 Oct - 20 Oct	Arajet
20 Oct - 27 Oct	Arajet
06 Oct - 11 Oct	Arajet
24 Oct - 27 Oct	Arajet
11 Oct - 13 Oct	Arajet
03 Oct - 08 Oct	Arajet
24 Oct - 29 Oct	Arajet
06 Oct - 09 Oct	Arajet
20 Oct - 25 Oct	Arajet
30 Oct - 06 Nov	Arajet
22 Oct - 05 Nov	Viva
29 Oct - 01 Nov	Aeromexico
30 Oct - 03 Nov	Avianca
30 Oct - 02 Nov	Avianca

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

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 Mexico City to San Juan in October from 204€

Return flights