AirHint found the following cheapest return flights from Ontario (ONT) to Singapore (SIN) in December 2025 (see full year).

Return flights

07 Dec - 23 Dec	China Airlines
09 Dec - 29 Dec	China Airlines
09 Dec - 30 Dec	China Airlines
12 Dec - 29 Dec	STARLUX Airlines
08 Dec - 02 Jan	STARLUX Airlines
26 Dec - 02 Jan	STARLUX Airlines
26 Dec - 11 Jan	China Airlines
20 Dec - 27 Dec	STARLUX Airlines
19 Dec - 31 Dec	STARLUX Airlines
17 Dec - 07 Jan	STARLUX Airlines
23 Dec - 06 Jan	China Airlines
23 Dec - 01 Jan	China Airlines
21 Dec - 01 Jan	China Airlines
14 Dec - 11 Jan	China Airlines
18 Dec - 08 Jan	China Airlines
09 Dec - 04 Jan	China Airlines

Also check the deals for one-way flights from Ontario to Singapore in December.

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 Singapore in December from 1008€

Return flights