Cheapest one-way flights from Washington to Rio Negro in December from $127

AirHint found the following cheapest one-way flights from Washington (IAD) to Rio Negro (MDE) in December 2025 (see full year).

One-Way flights

31 Dec United
16 Dec Copa
30 Dec Frontier Airlines
27 Dec Frontier Airlines
25 Dec Frontier Airlines
13 Dec Frontier Airlines
24 Dec Allegiant Air
26 Dec Frontier Airlines
20 Dec Frontier Airlines
17 Dec Avianca

Also check the deals for return flights from Washington 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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