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

Return flights

24 Sep - 15 Oct	Alaska Airlines
30 Sep - 21 Oct	Alaska Airlines
29 Sep - 22 Oct	Alaska Airlines
23 Sep - 25 Sep	Alaska Airlines
24 Sep - 08 Oct	Alaska Airlines
30 Sep - 08 Oct	Alaska Airlines
30 Sep - 19 Oct	Alaska Airlines
23 Sep - 04 Oct	Alaska Airlines
24 Sep - 04 Oct	Alaska Airlines
18 Sep - 09 Oct	Alaska Airlines
23 Sep - 07 Oct	Alaska Airlines
18 Sep - 26 Sep	Alaska Airlines
17 Sep - 24 Sep	Alaska Airlines
22 Sep - 28 Sep	WestJet
05 Sep - 16 Sep	China 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 $337

Return flights