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

Return flights

09 Oct - 17 Oct	Copa
14 Oct - 18 Oct	Spirit Airlines
09 Oct - 12 Oct	jetBlue
14 Oct - 17 Oct	Spirit Airlines
08 Oct - 17 Oct	Spirit Airlines
14 Oct - 24 Oct	Spirit Airlines
08 Oct - 24 Oct	Spirit Airlines
08 Oct - 18 Oct	Spirit Airlines
08 Oct - 12 Oct	Spirit Airlines
30 Oct - 04 Nov	Copa
09 Oct - 24 Oct	Spirit Airlines

Also check the deals for one-way flights from San Juan to Cancun 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 Cancun in October from 264€

Return flights