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

Return flights

27 Sep - 04 Oct	Air France	direct
27 Sep - 30 Sep	Air France
30 Sep - 15 Oct	Norwegian
25 Sep - 30 Sep	Scandinavian Airlines
23 Sep - 30 Sep	Scandinavian Airlines
24 Sep - 01 Oct	Norwegian
30 Sep - 06 Oct	Norwegian
30 Sep - 12 Oct	Norwegian
24 Sep - 15 Oct	Norwegian
30 Sep - 17 Oct	Norwegian
22 Sep - 28 Sep	easyJet
24 Sep - 06 Oct	Norwegian
24 Sep - 12 Oct	Norwegian
25 Sep - 26 Sep	Scandinavian Airlines
24 Sep - 03 Oct	Norwegian

Also check the deals for one-way flights from Paris to Tromso 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 Paris to Tromso in September from $258

Return flights