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

Return flights

03 Sep - 24 Sep	Avianca
17 Sep - 24 Sep	Avianca
10 Sep - 24 Sep	Avianca
15 Sep - 23 Sep	Avianca
10 Sep - 23 Sep	Avianca
23 Sep - 30 Sep	Copa
03 Sep - 10 Sep	Copa
29 Sep - 06 Oct	Avianca
28 Sep - 05 Oct	Avianca
19 Sep - 28 Sep	Copa
07 Sep - 17 Sep	Copa
11 Sep - 18 Sep	Copa
04 Sep - 06 Oct	Copa
27 Sep - 05 Oct	Copa
25 Sep - 02 Oct	Copa
12 Sep - 03 Oct	Copa
26 Sep - 04 Oct	Copa

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