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

Return flights

18 Sep - 27 Sep	Wingo	direct
25 Sep - 02 Oct	Wingo	direct
27 Sep - 04 Oct	Wingo	direct
11 Sep - 15 Sep	Wingo	direct
19 Sep - 28 Sep	Avianca	direct
18 Sep - 22 Sep	Avianca	direct
23 Sep - 29 Sep	Copa
18 Sep - 03 Oct	Copa
23 Sep - 03 Oct	Copa
24 Sep - 04 Oct	Avianca
12 Sep - 20 Sep	Copa
17 Sep - 21 Sep	Copa
12 Sep - 21 Sep	Copa
12 Sep - 19 Sep	Copa
18 Sep - 24 Sep	Copa
30 Sep - 10 Oct	Avianca	direct
28 Sep - 07 Oct	Avianca
07 Sep - 04 Oct	Copa
22 Sep - 01 Oct	Copa
07 Sep - 04 Oct	Avianca	direct

Also check the deals for one-way flights from Rio Negro to San Jose 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 Rio Negro to San Jose in September from $161

Return flights