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

Return flights

18 Sep - 21 Sep	Frontier Airlines
11 Sep - 24 Sep	Delta
24 Sep - 06 Oct	LATAM Airlines Group
16 Sep - 23 Sep	LATAM Airlines Group
22 Sep - 30 Sep	LATAM Airlines Group
14 Sep - 22 Sep	LATAM Airlines Group
17 Sep - 24 Sep	LATAM Airlines Group
24 Sep - 02 Oct	LATAM Airlines Group
12 Sep - 22 Sep	LATAM Airlines Group
11 Sep - 20 Sep	LATAM Airlines Group
12 Sep - 19 Sep	LATAM Airlines Group
19 Sep - 27 Sep	LATAM Airlines Group
02 Sep - 03 Oct	Volaris

Also check the deals for one-way flights from Ontario to Lima 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 Lima in September from $594

Return flights