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

Return flights

05 Dec - 14 Dec	China Airlines
08 Dec - 21 Dec	China Airlines
01 Dec - 08 Dec	China Airlines
31 Dec - 13 Jan	China Airlines
30 Dec - 13 Jan	China Airlines
01 Dec - 06 Dec	China Airlines
29 Dec - 16 Jan	China Airlines
31 Dec - 18 Jan	China Airlines
29 Dec - 20 Jan	China Airlines
02 Dec - 10 Dec	China Airlines
25 Dec - 24 Jan	Korean Air
29 Dec - 17 Jan	China Airlines
05 Dec - 10 Dec	China Airlines
25 Dec - 31 Dec	Korean Air
24 Dec - 23 Jan	China Airlines
10 Dec - 17 Dec	China Airlines
11 Dec - 21 Dec	China Airlines
11 Dec - 22 Dec	China Airlines
11 Dec - 13 Jan	China Airlines
29 Dec - 10 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 $1086

Return flights