Cheapest return flights from Miami to San Juan in September from $119

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

Return flights

21 Sep - 26 Sep Frontier Airlines direct
22 Sep - 05 Oct Frontier Airlines direct
22 Sep - 26 Sep Frontier Airlines direct
26 Sep - 03 Oct Frontier Airlines direct
28 Sep - 05 Oct Frontier Airlines direct
21 Sep - 28 Sep Frontier Airlines direct
29 Sep - 04 Oct Southwest Airlines
15 Sep - 19 Sep Frontier Airlines direct
26 Sep - 29 Sep Frontier Airlines direct
25 Sep - 29 Sep Frontier Airlines direct
26 Sep - 28 Sep Frontier Airlines direct
19 Sep - 28 Sep Frontier Airlines direct
25 Sep - 28 Sep Frontier Airlines direct
23 Sep - 03 Oct Spirit Airlines
28 Sep - 06 Oct Frontier Airlines direct
19 Sep - 21 Sep Frontier Airlines direct
24 Sep - 03 Oct Spirit Airlines
26 Sep - 01 Oct Frontier Airlines
13 Sep - 13 Oct Spirit Airlines
23 Sep - 07 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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