Cheapest return flights from Oslo to Trondheim in September from $128

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

Return flights

22 Sep - 25 Sep Wizz Air
29 Sep - 01 Oct Wizz Air
25 Sep - 28 Sep Norwegian direct
17 Sep - 23 Sep Norwegian
24 Sep - 08 Oct Norwegian direct
24 Sep - 27 Sep Norwegian direct
24 Sep - 26 Sep Norwegian direct
23 Sep - 23 Sep Norwegian direct
23 Sep - 27 Sep Norwegian direct
23 Sep - 26 Sep Norwegian direct
23 Sep - 28 Sep Norwegian direct
25 Sep - 27 Sep Norwegian direct
24 Sep - 11 Oct Norwegian direct
24 Sep - 10 Oct Norwegian direct
24 Sep - 13 Oct Norwegian direct
24 Sep - 15 Oct Norwegian direct
24 Sep - 09 Oct Norwegian direct
23 Sep - 08 Oct Norwegian direct
23 Sep - 11 Oct Norwegian direct
23 Sep - 10 Oct Norwegian direct

Also check the deals for one-way flights from Oslo to Trondheim in September.

Skyscanner

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.

Book a cheap hotel in Trondheim

Cheap car rent in Trondheim

Feel free to contact us with any feedback or request another flight research.