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

Return flights

09 Sep - 16 Sep	Wizz Air
22 Sep - 27 Sep	Wizz Air
17 Sep - 20 Sep	Wizz Air
02 Sep - 09 Sep	Wizz Air
15 Sep - 20 Sep	Wizz Air
17 Sep - 22 Sep	Wizz Air
03 Sep - 09 Sep	Wizz Air
23 Sep - 30 Sep	Wizz Air
03 Sep - 07 Sep	Wizz Air
19 Sep - 22 Sep	Wizz Air

Also check the deals for one-way flights from London 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 London to Tromso in September from 111€

Return flights