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

Return flights

18 Sep - 25 Sep	Spirit Airlines
18 Sep - 21 Sep	Spirit Airlines
27 Sep - 04 Oct	Sun Country Airlines
25 Sep - 01 Oct	Spirit Airlines
22 Sep - 25 Sep	Sun Country Airlines
18 Sep - 22 Sep	Spirit Airlines
26 Sep - 29 Sep	Sun Country Airlines
05 Sep - 07 Sep	Spirit Airlines

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

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

Cheapest return flights from Minneapolis to San Juan in September from 280€

Return flights