AirHint found the following cheapest return flights from Taipei (TSA) to Helsinki (HEL) in September 2025 (see full year).

Return flights

16 Sep - 18 Sep	Eastar Jet
10 Sep - 17 Sep	Japan Airlines
15 Sep - 07 Oct	Japan Airlines
25 Sep - 04 Oct	Japan Airlines
25 Sep - 05 Oct	Japan Airlines
28 Sep - 05 Oct	T'way Air
26 Sep - 04 Oct	Japan Airlines
08 Sep - 18 Sep	Japan Airlines
26 Sep - 30 Sep	Japan Airlines
18 Sep - 26 Sep	Japan Airlines
18 Sep - 27 Sep	Japan Airlines
06 Sep - 14 Sep	Japan Airlines
08 Sep - 20 Sep	Japan Airlines
04 Sep - 13 Sep	Japan Airlines
20 Sep - 27 Sep	Japan Airlines
27 Sep - 08 Oct	Japan Airlines
23 Sep - 06 Oct	Japan Airlines
26 Sep - 06 Oct	Japan Airlines
29 Sep - 08 Oct	Japan Airlines
16 Sep - 10 Oct	Japan Airlines

Also check the deals for one-way flights from Taipei to Helsinki 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 Taipei to Helsinki in September from 1042€

Return flights