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
13 Aug - 20 Aug	Air Transat
20 Aug - 27 Aug	Air Transat
27 Aug - 03 Sep	Air Transat
01 Aug - 08 Aug	Avianca
08 Aug - 15 Aug	Avianca
15 Aug - 22 Aug	Avianca
29 Aug - 05 Sep	Avianca
14 Aug - 21 Aug	Avianca
16 Aug - 23 Aug	Avianca
19 Aug - 26 Aug	Avianca
23 Aug - 30 Aug	Avianca
26 Aug - 02 Sep	Avianca
28 Aug - 04 Sep	Avianca
30 Aug - 06 Sep	Avianca
31 Aug - 07 Sep	Avianca
25 Aug - 01 Sep	Avianca

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 $476

Return flights