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

Return flights

08 Sep - 14 Sep	Wizz Air
10 Sep - 14 Sep	Wizz Air
15 Sep - 23 Sep	Wizz Air
05 Sep - 16 Sep	Wizz Air
12 Sep - 14 Sep	Wizz Air
19 Sep - 21 Sep	Wizz Air
11 Sep - 14 Sep	Wizz Air
09 Sep - 14 Sep	Wizz Air
18 Sep - 21 Sep	Wizz Air
05 Sep - 07 Sep	Wizz Air

Also check the deals for one-way flights from London to Trondheim 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 Trondheim in September from 72€

Return flights