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

Return flights

11 Oct - 16 Oct	Frontier Airlines
09 Oct - 13 Oct	Frontier Airlines
10 Oct - 12 Oct	Frontier Airlines
17 Oct - 24 Oct	Frontier Airlines
17 Oct - 24 Oct	Frontier Airlines	direct
17 Oct - 25 Oct	Frontier Airlines
17 Oct - 26 Oct	Frontier Airlines
01 Oct - 15 Oct	Southwest Airlines

Also check the deals for one-way flights from San Juan to Miami 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 Miami in October from 163€

Return flights