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

Return flights

29 Aug - 05 Sep	Hainan Airlines
26 Aug - 16 Sep	China Southern
28 Aug - 03 Sep	China Southern
26 Aug - 02 Sep	IndiGo
28 Aug - 10 Sep	IndiGo
23 Aug - 02 Sep	IndiGo
22 Aug - 31 Aug	Thai Lion Air
22 Aug - 29 Aug	IndiGo
25 Aug - 29 Aug	IndiGo
19 Aug - 02 Sep	IndiGo
15 Aug - 17 Aug	China Eastern
21 Aug - 30 Aug	IndiGo
21 Aug - 28 Aug	IndiGo
05 Aug - 01 Sep	IndiGo
25 Aug - 25 Sep	IndiGo
05 Aug - 30 Sep	China Eastern
10 Aug - 14 Aug	China Eastern
16 Aug - 18 Aug	IndiGo
04 Aug - 28 Aug	KLM
04 Aug - 12 Aug	KLM

Also check the deals for one-way flights from Bangkok to Oslo in August.

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 August from 611€

Return flights