AirHint found the following cheapest return flights from Frankfurt (FRA) to Sandefjord (TRF) in September 2025 (see full year).

Return flights

11 Sep - 15 Sep	Ryanair
09 Sep - 16 Sep	Ryanair
12 Sep - 15 Sep	Ryanair
19 Sep - 21 Sep	Ryanair
09 Sep - 15 Sep	Ryanair
05 Sep - 08 Sep	Ryanair
04 Sep - 08 Sep	Ryanair
12 Sep - 14 Sep	Ryanair
11 Sep - 14 Sep	Ryanair
18 Sep - 21 Sep	Ryanair
27 Sep - 04 Oct	Ryanair
25 Sep - 05 Oct	Ryanair
20 Sep - 03 Oct	LOT

Also check the deals for one-way flights from Frankfurt to Sandefjord 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 Frankfurt to Sandefjord in September from 123€

Return flights