Cheapest return flights from Helsinki to Bangkok in September from $634

Best time to book flights for Helsinki (HEL) to Bangkok (BKK) flights at AirHint

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

Return flights

08 Sep - 26 Sep Pegasus Airlines
11 Sep - 25 Sep Turkish Airlines
01 Sep - 24 Sep Turkish Airlines
14 Sep - 28 Sep Turkish Airlines
06 Sep - 26 Sep Turkish Airlines
01 Sep - 15 Sep Turkish Airlines
22 Sep - 29 Sep Turkish Airlines
01 Sep - 29 Sep Turkish Airlines
09 Sep - 17 Sep Turkish Airlines
11 Sep - 17 Sep Turkish Airlines
29 Sep - 29 Oct Turkish Airlines
29 Sep - 30 Oct Turkish Airlines
01 Sep - 01 Oct Turkish Airlines
08 Sep - 05 Oct Turkish Airlines
19 Sep - 04 Oct Turkish Airlines
23 Sep - 20 Oct KLM
30 Sep - 28 Oct KLM
23 Sep - 20 Oct Finnair direct
19 Sep - 04 Oct Finnair direct
08 Sep - 05 Oct Finnair direct

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

Skyscanner

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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