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

Return flights

06 Oct - 29 Oct	STARLUX Airlines
17 Oct - 20 Oct	China Airlines
31 Oct - 07 Nov	STARLUX Airlines
31 Oct - 14 Nov	STARLUX Airlines
19 Oct - 31 Oct	China Airlines
05 Oct - 20 Oct	China Airlines
25 Oct - 31 Oct	China Airlines
13 Oct - 27 Oct	China Airlines
05 Oct - 21 Oct	China Airlines
03 Oct - 12 Oct	China Airlines
17 Oct - 01 Nov	China Airlines
20 Oct - 02 Nov	China Airlines
30 Oct - 29 Nov	China Airlines
06 Oct - 12 Oct	China Airlines
31 Oct - 11 Nov	Qatar Airways

Also check the deals for one-way flights from Ontario to Jakarta in October.

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 October from $893

Return flights