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

Return flights

08 Sep - 15 Sep	Frontier Airlines
13 Sep - 23 Sep	Alaska Airlines
27 Sep - 05 Oct	Frontier Airlines
09 Sep - 15 Sep	Alaska Airlines
24 Sep - 05 Oct	Alaska Airlines
01 Sep - 05 Sep	Frontier Airlines
11 Sep - 18 Sep	Alaska Airlines
11 Sep - 15 Sep	Alaska Airlines
22 Sep - 03 Oct	Alaska Airlines
21 Sep - 30 Sep	Alaska Airlines
21 Sep - 01 Oct	Alaska Airlines
02 Sep - 06 Sep	Alaska Airlines
20 Sep - 21 Sep	Alaska Airlines
25 Sep - 28 Sep	Alaska Airlines
02 Sep - 15 Oct	Alaska Airlines

Also check the deals for one-way flights from Ontario to Vancouver 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 Vancouver in September from $302

Return flights