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

Return flights

24 Sep - 27 Sep	Copa
25 Sep - 30 Sep	Copa
24 Sep - 30 Sep	Copa
17 Sep - 23 Sep	jetBlue	direct
29 Sep - 06 Oct	Avianca
18 Sep - 25 Sep	Copa
30 Sep - 03 Oct	Avianca	direct
28 Sep - 02 Oct	Copa
25 Sep - 29 Sep	Copa
24 Sep - 29 Sep	Copa
29 Sep - 09 Oct	Spirit Airlines
29 Sep - 18 Oct	Spirit Airlines
29 Sep - 14 Oct	Spirit Airlines
29 Sep - 19 Oct	Spirit Airlines
24 Sep - 28 Sep	Copa
19 Sep - 21 Sep	Copa
29 Sep - 16 Oct	Spirit Airlines
29 Sep - 02 Oct	Spirit Airlines
29 Sep - 11 Oct	Spirit Airlines
26 Sep - 28 Sep	Copa

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 191€

Return flights