Cheapest return flights from Helsinki to Bangkok in September from $653

AirHint found the following cheapest return flights from Helsinki (HEL) to Bangkok (BKK) in September 2026 (see full year).

Return flights

03 Sep - 17 Sep Turkish Airlines
01 Sep - 28 Sep Turkish Airlines
17 Sep - 28 Sep Turkish Airlines
15 Sep - 28 Sep Turkish Airlines
12 Sep - 26 Sep Turkish Airlines
04 Sep - 13 Sep Turkish Airlines
06 Sep - 16 Sep Turkish Airlines
05 Sep - 26 Sep Turkish Airlines
01 Sep - 19 Sep Turkish Airlines
04 Sep - 26 Sep Turkish Airlines
30 Sep - 14 Oct Turkish Airlines
15 Sep - 31 Oct Turkish Airlines
05 Sep - 18 Oct KLM
24 Sep - 04 Oct Turkish Airlines
15 Sep - 31 Oct Finnair direct
05 Sep - 18 Oct Finnair direct

Also check the deals for one-way flights from Helsinki to Bangkok in September.

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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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