AirHint found the following cheapest return flights from Stockholm (ARN) to Trondheim (TRD) in October 2025 (see full year).

Return flights

09 Oct - 12 Oct	Scandinavian Airlines
31 Oct - 02 Nov	Scandinavian Airlines
17 Oct - 19 Oct	Wizz Air
15 Oct - 19 Oct	Wizz Air
15 Oct - 19 Oct	Scandinavian Airlines	direct
09 Oct - 12 Oct	Scandinavian Airlines	direct
03 Oct - 05 Oct	Wizz Air
09 Oct - 13 Oct	Scandinavian Airlines	direct
04 Oct - 05 Oct	Scandinavian Airlines

Also check the deals for one-way flights from Stockholm to Trondheim in October.

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 Stockholm to Trondheim in October from 89€

Return flights