Cheapest return flights from San Diego to Rio Negro in December from $399

AirHint found the following cheapest return flights from San Diego (SAN) to Rio Negro (MDE) in December 2025 (see full year).

Return flights

04 Dec - 20 Dec Frontier Airlines
07 Dec - 21 Dec Frontier Airlines
04 Dec - 19 Dec Frontier Airlines
02 Dec - 09 Dec Frontier Airlines
14 Dec - 21 Dec Frontier Airlines
02 Dec - 08 Dec United
05 Dec - 19 Dec United
12 Dec - 19 Dec Frontier Airlines
25 Dec - 02 Jan Frontier Airlines
27 Dec - 03 Jan Frontier Airlines

Also check the deals for one-way flights from San Diego to Rio Negro in December.

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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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