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

Return flights

17 Sep - 21 Sep	jetBlue	direct
01 Sep - 10 Sep	Copa
01 Sep - 09 Sep	Copa
21 Sep - 25 Sep	Avianca
18 Sep - 21 Sep	jetBlue	direct
18 Sep - 25 Sep	Spirit Airlines
18 Sep - 29 Sep	Spirit Airlines
04 Sep - 25 Sep	Spirit Airlines
04 Sep - 08 Sep	Spirit Airlines
27 Sep - 30 Sep	Copa
18 Sep - 02 Oct	Spirit Airlines
14 Sep - 02 Oct	Spirit Airlines
21 Sep - 02 Oct	Spirit Airlines
26 Sep - 02 Oct	Spirit Airlines
30 Sep - 02 Oct	Spirit Airlines
26 Sep - 15 Oct	Spirit Airlines
26 Sep - 16 Oct	Spirit Airlines
22 Sep - 02 Oct	Spirit Airlines
15 Sep - 02 Oct	Spirit Airlines
17 Sep - 02 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 194€

Return flights