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

Return flights

10 Sep - 18 Sep	Hainan Airlines
10 Sep - 23 Sep	Hainan Airlines
08 Sep - 22 Sep	Hainan Airlines
08 Sep - 15 Sep	Hainan Airlines
08 Sep - 21 Sep	Hainan Airlines
16 Sep - 23 Sep	IndiGo
15 Sep - 20 Sep	IndiGo
09 Sep - 16 Sep	KLM
04 Sep - 17 Sep	Emirates
21 Sep - 30 Sep	Emirates
30 Sep - 06 Oct	Emirates
29 Sep - 29 Oct	IndiGo
21 Sep - 09 Oct	Emirates
30 Sep - 10 Oct	Qatar Airways
27 Sep - 09 Oct	IndiGo
28 Sep - 11 Oct	Emirates
21 Sep - 09 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 482€

Return flights