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

Return flights

24 Aug - 19 Sep	Delta
22 Aug - 29 Aug	LATAM Airlines Group
24 Aug - 31 Aug	LATAM Airlines Group
31 Aug - 07 Sep	LATAM Airlines Group
26 Aug - 02 Sep	LATAM Airlines Group
28 Aug - 04 Sep	LATAM Airlines Group
30 Aug - 06 Sep	LATAM Airlines Group
21 Aug - 28 Aug	Copa
19 Aug - 28 Aug	Copa
23 Aug - 30 Aug	LATAM Airlines Group
18 Aug - 25 Aug	Delta
27 Aug - 03 Sep	Copa
20 Aug - 27 Aug	Avianca
29 Aug - 05 Sep	Copa
16 Aug - 29 Aug	Delta
19 Aug - 26 Aug	LATAM Airlines Group
18 Aug - 31 Aug	LATAM Airlines Group
19 Aug - 01 Sep	Copa
18 Aug - 01 Sep	Copa

Also check the deals for one-way flights from Montreal to Santiago 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 Santiago in August from 440€

Return flights