AirHint found the following cheapest return flights from Montreal (YUL) to Rio Negro (MDE) in August 2026 (see full year).

Return flights

06 Aug - 13 Aug	Air Transat
08 Aug - 24 Aug	Avianca
30 Aug - 06 Sep	Avianca
16 Aug - 23 Aug	Avianca
03 Aug - 10 Aug	Air Transat
05 Aug - 12 Aug	Air Transat
10 Aug - 17 Aug	Air Transat
12 Aug - 19 Aug	Air Transat
19 Aug - 26 Aug	Air Transat
24 Aug - 31 Aug	Air Transat
17 Aug - 24 Aug	Air Transat
28 Aug - 04 Sep	Copa
25 Aug - 01 Sep	Avianca
31 Aug - 07 Sep	Copa
29 Aug - 05 Sep	Copa

Also check the deals for one-way flights from Montreal to Rio Negro in August.

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 Montreal to Rio Negro in August from 412€

Return flights