Cheapest return flights from Helsinki to Bangkok in September from $636

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

01 Sep - 10 Sep Qatar Airways
17 Sep - 24 Sep Qatar Airways
02 Sep - 10 Sep Qatar Airways
02 Sep - 24 Sep Qatar Airways
01 Sep - 15 Sep Qatar Airways
08 Sep - 25 Sep Qatar Airways
10 Sep - 24 Sep Qatar Airways
10 Sep - 23 Sep Qatar Airways
08 Sep - 24 Sep Qatar Airways
28 Sep - 30 Oct Air France
15 Sep - 15 Oct KLM
09 Sep - 30 Sep Air France
18 Sep - 05 Oct Qatar Airways
18 Sep - 04 Oct Qatar Airways
23 Sep - 07 Oct Qatar Airways
21 Sep - 05 Oct Air France
24 Sep - 15 Oct Air France
30 Sep - 30 Oct Air France
21 Sep - 18 Oct Air France
29 Sep - 22 Oct Qatar Airways

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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