AirHint found the following cheapest return flights from Montreal (YUL) to Cartagena (CTG) in September 2025 (see full year).

Return flights

15 Sep - 24 Sep	Avianca
08 Sep - 24 Sep	Avianca
10 Sep - 17 Sep	Copa
14 Sep - 21 Sep	Copa
28 Sep - 05 Oct	Copa
23 Sep - 30 Sep	Copa
17 Sep - 24 Sep	Avianca
29 Sep - 06 Oct	Avianca
18 Sep - 25 Sep	Copa
19 Sep - 26 Sep	Copa
25 Sep - 02 Oct	Copa
04 Sep - 11 Sep	Copa
11 Sep - 18 Sep	Copa
26 Sep - 03 Oct	Copa
27 Sep - 11 Oct	Porter Airlines (Canada) Ltd
27 Sep - 04 Oct	Porter Airlines (Canada) Ltd
30 Sep - 07 Oct	LATAM Airlines Group

Also check the deals for one-way flights from Montreal to Cartagena 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 Cartagena in September from 313€

Return flights