AirHint found the following cheapest return flights from Montreal (YUL) to Santiago (SCL) in September 2026 (see full year).

Return flights

22 Sep - 29 Sep	Copa
02 Sep - 09 Sep	Copa
10 Sep - 17 Sep	Copa
03 Sep - 10 Sep	Copa
15 Sep - 22 Sep	Copa
17 Sep - 24 Sep	Copa
24 Sep - 15 Oct	Copa
22 Sep - 15 Oct	Copa
29 Sep - 08 Oct	Copa
22 Sep - 06 Oct	Copa
22 Sep - 14 Oct	Copa
28 Sep - 22 Oct	Copa
24 Sep - 07 Oct	Copa
24 Sep - 06 Oct	Copa
24 Sep - 14 Oct	Copa
28 Sep - 07 Oct	Copa
08 Sep - 15 Sep	Copa
07 Sep - 14 Sep	Copa
14 Sep - 21 Sep	Copa
18 Sep - 25 Sep	Copa

Also check the deals for one-way flights from Montreal to Santiago in September.

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 September from $516

Return flights