If you do not drive a car, there are several options from the ferry port in Horten to Torp airport:
Take the bus: For further information and timetables, see: http://www.paulsenbuss.no/horten-torp-horten/
Book a car: Autobutler Bilpool has 2 cars standing at the ferry dock in Horten and 2 cars at the parking house P1 at Torp airport. The cars are available 24 hours a day and you can book them via the website www.04526.no or call tel. 04526.
Alternatively, you can take a bus to Skoppum station and on to Torp by train. For further information, check www.vkt.no or www.nsb.no