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

Return flights

11 Sep - 18 Sep	Air Canada
02 Sep - 30 Sep	United
29 Sep - 30 Oct	United
29 Sep - 13 Oct	United
30 Sep - 15 Oct	United
11 Sep - 14 Oct	United
01 Sep - 07 Sep	Air Canada
20 Sep - 30 Sep	United
29 Sep - 10 Oct	United
02 Sep - 06 Sep	United
19 Sep - 05 Oct	Air Canada
20 Sep - 05 Oct	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 778€

Return flights