Cheapest return flights from Miami to San Juan in September from $158

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

Return flights

29 Sep - 03 Oct Frontier Airlines direct
01 Sep - 04 Sep Frontier Airlines
25 Sep - 29 Sep Frontier Airlines
05 Sep - 12 Sep Frontier Airlines direct
22 Sep - 05 Oct Frontier Airlines direct
25 Sep - 29 Sep Frontier Airlines direct
26 Sep - 29 Sep Frontier Airlines direct
19 Sep - 21 Sep Frontier Airlines direct
21 Sep - 25 Sep Spirit Airlines
18 Sep - 25 Sep Spirit Airlines direct
21 Sep - 25 Sep Spirit Airlines direct
04 Sep - 07 Sep Frontier Airlines direct
18 Sep - 02 Oct Spirit Airlines
21 Sep - 02 Oct Spirit Airlines
25 Sep - 02 Oct Spirit Airlines direct
18 Sep - 02 Oct Spirit Airlines direct
21 Sep - 02 Oct Spirit Airlines direct
25 Sep - 03 Oct Spirit Airlines
18 Sep - 03 Oct Spirit Airlines
21 Sep - 03 Oct Spirit Airlines

Also check the deals for one-way flights from Miami to San Juan in September.

Skyscanner

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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