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

Return flights

15 Sep - 22 Sep	Hainan Airlines
04 Sep - 17 Sep	Qatar Airways
12 Sep - 22 Sep	Hainan Airlines
10 Sep - 17 Sep	Qatar Airways
19 Sep - 22 Sep	Hainan Airlines
14 Sep - 17 Sep	Qatar Airways
15 Sep - 23 Sep	IndiGo
17 Sep - 20 Sep	IndiGo
07 Sep - 14 Sep	Qatar Airways
14 Sep - 21 Sep	Qatar Airways
23 Sep - 07 Oct	IndiGo
25 Sep - 07 Oct	Qatar Airways
24 Sep - 06 Oct	Qatar Airways
25 Sep - 05 Oct	Qatar Airways
20 Sep - 13 Oct	Qatar Airways
27 Sep - 09 Oct	IndiGo
27 Sep - 12 Oct	IndiGo
20 Sep - 04 Oct	Qatar Airways
01 Sep - 31 Oct	Finnair
02 Sep - 27 Oct	Emirates

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 $531

Return flights