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

Return flights

26 Aug - 10 Sep	Hainan Airlines
21 Aug - 05 Sep	Hainan Airlines
21 Aug - 29 Aug	Hainan Airlines
19 Aug - 19 Sep	Hainan Airlines
25 Aug - 08 Sep	Qatar Airways
20 Aug - 23 Sep	Qatar Airways
20 Aug - 08 Sep	Qatar Airways
27 Aug - 25 Sep	Qatar Airways
20 Aug - 18 Sep	Qatar Airways
20 Aug - 09 Sep	Qatar Airways
20 Aug - 16 Sep	Qatar Airways
22 Aug - 29 Aug	Qatar Airways
20 Aug - 27 Aug	Qatar Airways
28 Aug - 31 Aug	Hainan Airlines
24 Aug - 31 Aug	IndiGo
17 Aug - 28 Aug	IndiGo
19 Aug - 28 Aug	IndiGo
21 Aug - 28 Aug	IndiGo
17 Aug - 20 Aug	Norwegian
16 Aug - 25 Aug	IndiGo

Also check the deals for one-way flights from Oslo to Bangkok 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 Oslo to Bangkok in August from 463€

Return flights