Why aren't there more Air Taxi Service businesses? Why do we not see Part 135 ops doing more small SEL aircraft shuttling customers around smaller regions? Lack of demand? Too high of an operating cost? Pressure from the 121's? Since getting my PPL, I've had several friends of the family ask if I could shuttle them to "inconvenient to drive" destinations and bring them back. I decline of course since I don't have a CPL. But it has me thinking there is enough demand out there that a small well run aviation company could make something of the Air Taxi business.