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

Return flights

17 Sep - 01 Oct	Copa
29 Sep - 06 Oct	Porter Airlines (Canada) Ltd
21 Sep - 23 Sep	Avianca
26 Sep - 03 Oct	Copa
28 Sep - 05 Oct	Avianca
24 Sep - 25 Oct	Copa
17 Sep - 22 Sep	Copa
22 Sep - 29 Sep	Copa
24 Sep - 01 Oct	Avianca
30 Sep - 07 Oct	Porter Airlines (Canada) Ltd
21 Sep - 28 Sep	Avianca
17 Sep - 24 Sep	Avianca
27 Sep - 04 Oct	Air Transat
18 Sep - 22 Sep	Avianca
20 Sep - 27 Sep	Avianca
19 Sep - 28 Sep	WestJet

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 341€

Return flights