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

Return flights

22 Sep - 01 Oct	WestJet
22 Sep - 15 Oct	WestJet
16 Sep - 14 Oct	WestJet
16 Sep - 19 Oct	WestJet
11 Sep - 14 Oct	WestJet
11 Sep - 09 Oct	WestJet
10 Sep - 09 Oct	WestJet
16 Sep - 23 Sep	WestJet
17 Sep - 24 Sep	ANA
23 Sep - 15 Oct	WestJet
22 Sep - 08 Oct	WestJet
16 Sep - 30 Sep	ANA
02 Sep - 17 Sep	ANA
21 Sep - 29 Sep	Air Canada
26 Sep - 03 Oct	WestJet
24 Sep - 30 Sep	WestJet
01 Sep - 19 Sep	Philippine Airlines
04 Sep - 13 Sep	Air Canada
11 Sep - 14 Sep	Air Canada
10 Sep - 26 Sep	Air Canada

Also check the deals for one-way flights from Toronto 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 Toronto to Singapore in September from 707€

Return flights