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

Return flights

12 Sep - 29 Sep	Spirit Airlines
12 Sep - 28 Sep	Spirit Airlines
12 Sep - 15 Sep	Spirit Airlines
25 Sep - 29 Sep	Copa
06 Sep - 14 Sep	Copa
21 Sep - 29 Sep	Copa
12 Sep - 14 Sep	Spirit Airlines
24 Sep - 28 Sep	Copa
21 Sep - 28 Sep	Spirit Airlines
28 Sep - 06 Oct	Spirit Airlines
28 Sep - 29 Sep	Spirit Airlines
25 Sep - 06 Oct	Spirit Airlines
13 Sep - 12 Oct	Avianca	direct
21 Sep - 06 Oct	Spirit Airlines
28 Sep - 18 Oct	Spirit Airlines
12 Sep - 12 Oct	Avianca	direct
16 Sep - 06 Oct	Spirit Airlines
28 Sep - 07 Oct	Spirit Airlines
24 Sep - 06 Oct	Spirit Airlines
15 Sep - 06 Oct	Spirit Airlines

Also check the deals for one-way flights from San Juan to Rio Negro 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.

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Cheapest return flights from San Juan to Rio Negro in September from 162€

Return flights