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

Return flights

03 Dec - 22 Dec	STARLUX Airlines
05 Dec - 20 Dec	STARLUX Airlines
05 Dec - 15 Dec	STARLUX Airlines
05 Dec - 22 Dec	STARLUX Airlines
03 Dec - 13 Dec	STARLUX Airlines
06 Dec - 17 Dec	STARLUX Airlines
04 Dec - 18 Dec	China Airlines
02 Dec - 10 Dec	China Airlines
04 Dec - 17 Dec	China Airlines
07 Dec - 22 Dec	China Airlines
28 Dec - 26 Jan	China Airlines
22 Dec - 19 Jan	STARLUX Airlines
08 Dec - 05 Jan	STARLUX Airlines
22 Dec - 17 Jan	STARLUX Airlines
23 Dec - 22 Jan	China Airlines
05 Dec - 03 Jan	STARLUX Airlines
29 Dec - 03 Jan	STARLUX Airlines
15 Dec - 12 Jan	STARLUX Airlines
17 Dec - 16 Jan	STARLUX Airlines
21 Dec - 19 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 976€

Return flights