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

Return flights

29 Sep - 23 Oct	FrenchBee
27 Sep - 18 Oct	Porter Airlines (Canada) Ltd
29 Sep - 06 Oct	FrenchBee
24 Sep - 01 Oct	FrenchBee
30 Sep - 07 Oct	WestJet
28 Sep - 05 Oct	FrenchBee
26 Sep - 03 Oct	FrenchBee
27 Sep - 04 Oct	Porter Airlines (Canada) Ltd
25 Sep - 02 Oct	United
21 Sep - 28 Sep	United
22 Sep - 29 Sep	United
19 Sep - 26 Sep	United
20 Sep - 27 Sep	United
18 Sep - 02 Oct	Air Canada
23 Sep - 30 Sep	ANA
21 Sep - 22 Sep	WestJet

Also check the deals for one-way flights from Montreal 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 Montreal to Shanghai in September from 942€

Return flights