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

Return flights

25 Sep - 02 Oct	ANA
24 Sep - 01 Oct	Qatar Airways
23 Sep - 30 Sep	Japan Airlines
29 Sep - 06 Oct	FrenchBee
18 Sep - 01 Oct	Air Canada
26 Sep - 03 Oct	FrenchBee
28 Sep - 05 Oct	FrenchBee
30 Sep - 07 Oct	Air Transat
26 Sep - 05 Oct	FrenchBee
22 Sep - 29 Sep	FrenchBee
19 Sep - 26 Sep	Qatar Airways
27 Sep - 04 Oct	Air Transat
21 Sep - 28 Sep	FrenchBee
20 Sep - 27 Sep	Porter Airlines (Canada) Ltd
28 Sep - 16 Oct	United

Also check the deals for one-way flights from Montreal to Singapore 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 Singapore in September from 844€

Return flights