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

Return flights

21 May - 28 May	Air Transat
28 May - 04 Jun	Air Transat
19 May - 26 May	Porter Airlines (Canada) Ltd
01 May - 08 May	Avianca
03 May - 10 May	Avianca
17 May - 24 May	Avianca
06 May - 13 May	Avianca
08 May - 15 May	Avianca
10 May - 17 May	Avianca
18 May - 25 May	Avianca
20 May - 27 May	Avianca
25 May - 01 Jun	Avianca
27 May - 03 Jun	Avianca
26 May - 02 Jun	Porter Airlines (Canada) Ltd
29 May - 05 Jun	Arajet
31 May - 07 Jun	Avianca
30 May - 06 Jun	Avianca

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

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 May from 388€

Return flights