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

Return flights

04 Sep - 07 Sep	Ryanair
25 Sep - 02 Oct	Ryanair
05 Sep - 07 Sep	Ryanair
06 Sep - 10 Sep	Air France
26 Sep - 01 Oct	Ryanair
10 Sep - 13 Sep	Air France
25 Sep - 30 Sep	KLM
30 Sep - 05 Oct	Air France
01 Sep - 08 Sep	Brussels Airlines
08 Sep - 11 Sep	Ryanair
17 Sep - 21 Sep	Ryanair
18 Sep - 22 Sep	Ryanair
07 Sep - 11 Sep	Brussels Airlines

Also check the deals for one-way flights from Birmingham 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 Birmingham to Oslo in September from $218

Return flights