Cheapest one-way flights from Miami to San Juan in September from $72

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

One-Way flights

27 Sep Frontier Airlines
01 Sep Frontier Airlines
22 Sep Frontier Airlines
29 Sep Frontier Airlines
07 Sep Frontier Airlines
25 Sep Frontier Airlines
14 Sep Frontier Airlines
15 Sep Frontier Airlines
21 Sep Frontier Airlines direct
22 Sep Frontier Airlines direct

Also check the deals for return 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.

Book a cheap hotel in San Juan

Cheap car rent in San Juan

Feel free to contact us with any feedback or request another flight research.