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

Return flights

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

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 $367

Return flights