Cheapest return flights from Helsinki to Bangkok in September from $552

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

Return flights

23 Sep - 30 Oct Pegasus Airlines
30 Sep - 30 Oct Pegasus Airlines
30 Sep - 28 Oct Pegasus Airlines
16 Sep - 23 Sep Norwegian Air Sweden AOC
01 Sep - 15 Sep Norwegian Air Sweden AOC
15 Sep - 02 Oct Norwegian Air Sweden AOC
08 Sep - 23 Sep Norwegian Air Sweden AOC
02 Sep - 23 Sep Norwegian Air Sweden AOC
01 Sep - 17 Sep Norwegian Air Sweden AOC
01 Sep - 11 Sep Norwegian Air Sweden AOC
01 Sep - 19 Sep Norwegian Air Sweden AOC
04 Sep - 02 Oct Scandinavian Airlines
01 Sep - 14 Sep Norwegian Air Sweden AOC
10 Sep - 17 Sep Norwegian Air Sweden AOC
01 Sep - 23 Sep Norwegian Air Sweden AOC
22 Sep - 22 Oct Norwegian Air Sweden AOC
23 Sep - 23 Oct Norwegian Air Sweden AOC
26 Sep - 10 Oct Pegasus Airlines
10 Sep - 12 Oct Pegasus Airlines
30 Sep - 31 Oct Pegasus Airlines

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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