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

Return flights

01 Sep - 18 Sep	American Airlines
21 Sep - 18 Oct	Finnair
10 Sep - 23 Sep	Finnair
23 Sep - 28 Sep	Asiana Airlines
29 Sep - 06 Oct	Qatar Airways
07 Sep - 17 Sep	Qatar Airways
02 Sep - 16 Sep	Qatar Airways
01 Sep - 16 Sep	Qatar Airways
22 Sep - 18 Oct	Qatar Airways
27 Sep - 18 Oct	Qatar Airways
06 Sep - 15 Sep	Qatar Airways
14 Sep - 24 Sep	Qatar Airways
10 Sep - 29 Sep	Qatar Airways
13 Sep - 20 Sep	Qatar Airways

Also check the deals for one-way flights from Ontario to Shanghai 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 Shanghai in September from $891

Return flights