Cheapest return flights from Trondheim to Oslo in September from $97

AirHint found the following cheapest return flights from Trondheim (TRD) to Oslo (OSL) in September 2026 (see full year).

Return flights

23 Sep - 27 Sep Scandinavian Airlines direct
10 Sep - 23 Sep Norwegian direct
03 Sep - 23 Sep Norwegian direct
04 Sep - 23 Sep Norwegian direct
23 Sep - 23 Sep Norwegian direct
10 Sep - 26 Sep Norwegian direct
10 Sep - 27 Sep Norwegian direct
23 Sep - 26 Sep Norwegian direct
27 Sep - 27 Sep Norwegian direct

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

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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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