AirHint found the following cheapest return flights from Tromso (TOS) to Copenhagen (CPH) in September 2025 (see full year).

Return flights

16 Sep - 17 Sep	Scandinavian Airlines
23 Sep - 27 Sep	Wizz Air
10 Sep - 17 Sep	Scandinavian Airlines
29 Sep - 01 Oct	Norwegian
22 Sep - 25 Sep	Scandinavian Airlines
21 Sep - 24 Sep	Scandinavian Airlines
21 Sep - 23 Sep	Scandinavian Airlines
28 Sep - 30 Sep	Scandinavian Airlines
12 Sep - 16 Sep	Finnair
23 Sep - 08 Oct	Norwegian
23 Sep - 01 Oct	Norwegian
24 Sep - 08 Oct	Norwegian
24 Sep - 01 Oct	Norwegian
17 Sep - 08 Oct	Norwegian
17 Sep - 01 Oct	Norwegian
16 Sep - 01 Oct	Norwegian
30 Sep - 08 Oct	Norwegian
30 Sep - 01 Oct	Norwegian
17 Sep - 23 Sep	Norwegian
15 Sep - 23 Sep	Norwegian

Also check the deals for one-way flights from Tromso to Copenhagen in September.

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 Tromso to Copenhagen in September from 135€

Return flights