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

Return flights

27 Aug - 29 Aug	Hainan Airlines
20 Aug - 02 Sep	IndiGo
26 Aug - 24 Sep	China Southern
21 Aug - 03 Sep	IndiGo
20 Aug - 22 Aug	IndiGo
28 Aug - 31 Aug	IndiGo
10 Aug - 17 Aug	China Eastern
21 Aug - 28 Aug	Thai VietJet Air
19 Aug - 01 Sep	IndiGo
17 Aug - 13 Sep	China Eastern
07 Aug - 23 Aug	China Eastern
05 Aug - 17 Aug	IndiGo
25 Aug - 30 Sep	IndiGo
19 Aug - 25 Sep	IndiGo
04 Aug - 01 Sep	China Eastern
04 Aug - 11 Aug	China Eastern
17 Aug - 12 Sep	Austrian Airlines
08 Aug - 24 Aug	IndiGo
09 Aug - 25 Aug	Finnair
29 Aug - 05 Sep	Thai Airways	direct

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 $664

Return flights