Cheapest return flights from Trondheim to Helsinki in September from $168

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

Return flights

22 Sep - 23 Sep Scandinavian Airlines
20 Sep - 24 Sep Scandinavian Airlines
20 Sep - 22 Sep Scandinavian Airlines
20 Sep - 25 Sep Scandinavian Airlines
27 Sep - 29 Sep Scandinavian Airlines
29 Sep - 02 Oct Scandinavian Airlines
18 Sep - 22 Sep Scandinavian Airlines
17 Sep - 22 Sep Scandinavian Airlines
27 Sep - 01 Oct Scandinavian Airlines
23 Sep - 26 Sep Scandinavian Airlines
15 Sep - 20 Sep Scandinavian Airlines
16 Sep - 18 Sep Scandinavian Airlines
29 Sep - 02 Oct Finnair direct

Also check the deals for one-way flights from Trondheim to Helsinki 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.

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