AirHint found the following cheapest return flights from Las Vegas (LAS) to Rio Negro (MDE) in December 2025 (see full year).

Return flights

03 Dec - 04 Dec	Spirit Airlines
03 Dec - 05 Dec	Spirit Airlines
04 Dec - 05 Dec	Spirit Airlines
08 Dec - 14 Dec	Spirit Airlines
10 Dec - 14 Dec	Spirit Airlines
05 Dec - 14 Dec	Spirit Airlines
03 Dec - 14 Dec	Spirit Airlines
04 Dec - 14 Dec	Spirit Airlines
12 Dec - 14 Dec	United
19 Dec - 10 Jan	Viva
19 Dec - 06 Jan	Spirit Airlines
19 Dec - 04 Jan	Spirit Airlines

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

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 Las Vegas to Rio Negro in December from 298€

Return flights