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

Return flights

18 Sep - 23 Sep	Avianca	direct
18 Sep - 27 Sep	Avianca	direct
20 Sep - 07 Oct	Avianca	direct
18 Sep - 02 Oct	Avianca	direct
27 Sep - 04 Oct	Avianca	direct
18 Sep - 25 Sep	Avianca	direct
20 Sep - 25 Sep	Avianca	direct
20 Sep - 23 Sep	Avianca	direct
25 Sep - 30 Sep	Avianca	direct
20 Sep - 04 Oct	United
17 Sep - 02 Oct	United
25 Sep - 29 Sep	Avianca

Also check the deals for one-way flights from Ontario 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 Ontario to San Salvador in September from $354

Return flights