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

Return flights

10 Sep - 17 Sep	Qatar Airways
09 Sep - 18 Sep	Qatar Airways
23 Sep - 02 Oct	Qatar Airways
26 Sep - 07 Oct	Qatar Airways
27 Sep - 06 Oct	Qatar Airways
15 Sep - 20 Sep	IndiGo
10 Sep - 24 Sep	Air France
27 Sep - 10 Oct	Qatar Airways
26 Sep - 11 Oct	Qatar Airways
10 Sep - 22 Sep	Air France
08 Sep - 14 Sep	KLM
16 Sep - 30 Sep	KLM
17 Sep - 30 Sep	Air France
23 Sep - 30 Sep	Qatar Airways
23 Sep - 26 Sep	IndiGo
28 Sep - 11 Oct	Emirates
19 Sep - 01 Oct	SWISS
23 Sep - 02 Oct	Thai Airways	direct
27 Sep - 10 Oct	Thai Airways	direct
27 Sep - 06 Oct	Thai Airways	direct

Also check the deals for one-way flights from Bangkok to Oslo 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 Bangkok to Oslo in September from $682

Return flights