AirHint found the following cheapest one-way flights from Oslo (OSL) to Trondheim (TRD) in December 2025 (see full year).

One-Way flights

02 Dec	Wizz Air
07 Dec	Wizz Air
08 Dec	Norwegian	direct
02 Dec	Norwegian	direct
12 Dec	Scandinavian Airlines	direct
05 Dec	Scandinavian Airlines	direct
24 Dec	Scandinavian Airlines	direct
16 Dec	Scandinavian Airlines	direct
17 Dec	Scandinavian Airlines	direct
10 Dec	Scandinavian Airlines	direct

Also check the deals for return flights from Oslo to Trondheim in December.

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 one-way flights from Oslo to Trondheim in December from 35€

One-Way flights