http://www.ntsb.gov/aviation/Table1.htm
accidents per 100.000 FLT hrs:
scheduled: 0.171
"on-demand": 2.02
factor btw those numbers is 11.8
http://www.ntsb.gov/aviation/Table9.htm
http://www.ntsb.gov/aviation/Table6.htm
and smallfry: don't mix up mistake and intentional deviation. take-off from the wrong runway is a mistake. making a trans-atlantic photo-tcas-f*ck-up is a intentional deviation.