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

Return flights

25 Oct - 31 Oct	Arajet
18 Oct - 24 Oct	Arajet
11 Oct - 17 Oct	Arajet
24 Oct - 28 Oct	Copa
01 Oct - 05 Oct	Copa
16 Oct - 19 Oct	Copa
11 Oct - 24 Oct	Spirit Airlines
08 Oct - 18 Oct	Copa
01 Oct - 17 Oct	Spirit Airlines
25 Oct - 06 Nov	Spirit Airlines
25 Oct - 01 Nov	Spirit Airlines
18 Oct - 06 Nov	Spirit Airlines
18 Oct - 01 Nov	Spirit Airlines
10 Oct - 24 Oct	Spirit Airlines
16 Oct - 01 Nov	Spirit Airlines
25 Oct - 14 Nov	Spirit Airlines
12 Oct - 01 Nov	Spirit Airlines
19 Oct - 06 Nov	Spirit Airlines
19 Oct - 01 Nov	Spirit Airlines

Also check the deals for one-way flights from Cancun 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 Cancun to San Juan in October from 182€

Return flights