AirHint found the following cheapest return flights from Montreal (YUL) to Lima (LIM) in August 2025 (see full year).

Return flights

28 Aug - 25 Sep	Copa
29 Aug - 13 Sep	Copa
29 Aug - 19 Sep	Copa
28 Aug - 26 Sep	Copa
29 Aug - 17 Sep	Copa
29 Aug - 20 Sep	Copa
31 Aug - 07 Sep	Copa
30 Aug - 08 Sep	Delta
27 Aug - 09 Sep	Delta
29 Aug - 15 Sep	Copa

Also check the deals for one-way flights from Montreal to Lima 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 Lima in August from $451

Return flights