AirHint found the following cheapest return flights from Ontario (ONT) to Taipei (TPE) in September 2025 (see full year).

Return flights

25 Sep - 02 Oct	Delta
24 Sep - 08 Oct	Delta
25 Sep - 19 Oct	Delta
26 Sep - 19 Oct	Delta
27 Sep - 19 Oct	Delta
24 Sep - 08 Oct	China Airlines	direct
25 Sep - 19 Oct	China Airlines	direct
25 Sep - 28 Sep	China Airlines	direct
28 Sep - 05 Oct	China Airlines	direct
23 Sep - 13 Oct	China Airlines	direct
29 Sep - 13 Oct	China Airlines	direct
26 Sep - 29 Sep	STARLUX Airlines	direct

Also check the deals for one-way flights from Ontario to Taipei in September.

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 Taipei in September from 558€

Return flights