$200 hour for a four seat Cessna that is private hired to pilots or $360+ to charter (hire plane and pilot).
The below link is to a local scenic flight operator, they charge $200 per passenger (Minimum 2) so thats $400 for a 40 minute joy flight.
I can take three passengers for around $70 each for an hour using the cost share model, if there is only 1 passenger we just split the $200 aircraft rental fee between us so would be no more than $100 per hour for 1 passenger.
http://promcountryflights.com.au/Flights.php