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

Return flights

27 Dec - 12 Jan	Avianca
28 Dec - 11 Jan	Avianca
24 Dec - 11 Jan	Avianca
26 Dec - 11 Jan	Avianca
27 Dec - 19 Jan	Avianca
27 Dec - 10 Jan	Avianca
27 Dec - 11 Jan	Avianca
27 Dec - 14 Jan	Avianca
27 Dec - 14 Jan	United	direct
20 Dec - 11 Jan	Viva
26 Dec - 30 Dec	United	direct

Also check the deals for one-way flights from Houston 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 Houston to Rio Negro in December from $651

Return flights