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

Return flights

01 Dec - 08 Dec	Avianca
05 Dec - 06 Dec	LATAM Airlines Group
06 Dec - 08 Dec	LATAM Airlines Group
02 Dec - 09 Dec	LATAM Airlines Group
03 Dec - 10 Dec	LATAM Airlines Group
04 Dec - 11 Dec	LATAM Airlines Group
06 Dec - 13 Dec	LATAM Airlines Group
08 Dec - 15 Dec	LATAM Airlines Group
10 Dec - 17 Dec	LATAM Airlines Group
11 Dec - 18 Dec	LATAM Airlines Group
06 Dec - 01 Jan	Copa
25 Dec - 15 Jan	Air Canada
26 Dec - 13 Jan	Avianca
29 Dec - 05 Jan	Air Canada
30 Dec - 06 Jan	Air Canada
31 Dec - 07 Jan	Air Canada
29 Dec - 11 Jan	Avianca
07 Dec - 07 Jan	Avianca
27 Dec - 15 Jan	United
14 Dec - 04 Jan	Air Canada

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 523€

Return flights