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

Return flights

18 Sep - 09 Oct	Wizz Air
25 Sep - 27 Sep	Wizz Air
18 Sep - 20 Sep	Wizz Air
20 Sep - 22 Sep	Norwegian
19 Sep - 22 Sep	Wizz Air
15 Sep - 15 Sep	Norwegian
25 Sep - 25 Sep	Wizz Air
25 Sep - 28 Sep	Wizz Air
12 Sep - 16 Sep	Wizz Air
19 Sep - 21 Sep	Wizz Air
12 Sep - 19 Sep	Wizz Air
29 Sep - 07 Oct	Wizz Air
30 Sep - 18 Oct	Norwegian	direct
30 Sep - 17 Oct	Norwegian	direct
30 Sep - 20 Oct	Norwegian	direct
30 Sep - 19 Oct	Norwegian	direct
30 Sep - 21 Oct	Norwegian	direct
30 Sep - 02 Oct	Norwegian	direct
30 Sep - 10 Oct	Norwegian	direct
30 Sep - 01 Oct	Norwegian	direct

Also check the deals for one-way flights from Oslo to Bergen 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 Oslo to Bergen in September from $103

Return flights