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

Return flights

27 Oct - 26 Nov	Arajet
29 Oct - 08 Nov	Arajet
09 Oct - 13 Oct	Spirit Airlines
05 Oct - 16 Oct	Copa
03 Oct - 08 Oct	Copa
23 Oct - 29 Oct	Copa
10 Oct - 13 Oct	Spirit Airlines
31 Oct - 07 Nov	Copa
30 Oct - 08 Nov	Copa
28 Oct - 07 Nov	Copa
24 Oct - 04 Nov	Copa
16 Oct - 19 Oct	Copa
07 Oct - 21 Oct	Copa
18 Oct - 20 Oct	Copa
23 Oct - 27 Oct	Copa
29 Oct - 03 Nov	Copa
23 Oct - 03 Nov	Copa
08 Oct - 12 Oct	Spirit Airlines
29 Oct - 02 Nov	Copa
31 Oct - 07 Nov	Aeromexico	direct

Also check the deals for one-way flights from San Juan to Mexico City 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 San Juan to Mexico City in October from $303

Return flights