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

Return flights

14 Sep - 28 Sep	Avianca
03 Sep - 10 Sep	Avianca
07 Sep - 14 Sep	Avianca
15 Sep - 22 Sep	Avianca
17 Sep - 24 Sep	Avianca
21 Sep - 28 Sep	Avianca
08 Sep - 15 Sep	Avianca
10 Sep - 17 Sep	Avianca
12 Sep - 19 Sep	Avianca
14 Sep - 21 Sep	Avianca
29 Sep - 06 Oct	Avianca
24 Sep - 01 Oct	Avianca
26 Sep - 03 Oct	Avianca
28 Sep - 05 Oct	Avianca
25 Sep - 02 Oct	Copa
27 Sep - 04 Oct	Porter Airlines (Canada) Ltd
20 Sep - 04 Oct	Avianca
30 Sep - 07 Oct	Avianca

Also check the deals for one-way flights from Montreal to San Salvador 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 San Salvador in September from 301€

Return flights