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

Return flights

21 Sep - 07 Oct	China Eastern
09 Sep - 20 Sep	China Eastern
26 Sep - 09 Oct	IndiGo
24 Sep - 02 Oct	China Eastern
11 Sep - 28 Sep	Hainan Airlines
08 Sep - 18 Sep	IndiGo
01 Sep - 09 Sep	IndiGo
01 Sep - 08 Sep	IndiGo
19 Sep - 26 Sep	Turkish Airlines
13 Sep - 21 Sep	IndiGo
01 Sep - 10 Sep	IndiGo
11 Sep - 26 Sep	IndiGo
20 Sep - 30 Sep	Qatar Airways
20 Sep - 04 Oct	IndiGo

Also check the deals for one-way flights from Singapore 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 Singapore to Oslo in September from $668

Return flights