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

Return flights

07 Dec - 24 Jan	China Airlines
01 Dec - 18 Jan	China Airlines
15 Dec - 22 Dec	China Airlines
14 Dec - 25 Jan	China Airlines
07 Dec - 25 Jan	Qatar Airways
24 Dec - 10 Jan	STARLUX Airlines
13 Dec - 07 Jan	China Airlines
17 Dec - 22 Dec	China Airlines
19 Dec - 30 Dec	China Airlines
19 Dec - 28 Dec	Qatar Airways
11 Dec - 08 Jan	Qatar Airways
12 Dec - 08 Jan	Qatar Airways

Also check the deals for one-way flights from Ontario to Jakarta 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 Jakarta in December from $1138

Return flights