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

Return flights

03 Dec - 10 Dec	United
09 Dec - 16 Dec	United
02 Dec - 09 Dec	Copa
04 Dec - 11 Dec	Copa
02 Dec - 08 Dec	Copa
01 Dec - 15 Dec	Delta
01 Dec - 08 Dec	LATAM Airlines Group
06 Dec - 13 Dec	LATAM Airlines Group
07 Dec - 14 Dec	LATAM Airlines Group
08 Dec - 15 Dec	LATAM Airlines Group
10 Dec - 27 Jan	Delta
31 Dec - 22 Jan	LATAM Airlines Group
10 Dec - 30 Jan	LATAM Airlines Group
31 Dec - 23 Jan	Delta
14 Dec - 27 Jan	Delta
31 Dec - 24 Jan	Delta
15 Dec - 28 Jan	Delta
11 Dec - 30 Jan	Delta
12 Dec - 30 Jan	Porter Airlines (Canada) Ltd
12 Dec - 31 Jan	Porter Airlines (Canada) Ltd

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

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 December from $483

Return flights