Please refer to the following two articles which explain in detail what you will be seeing on the 60 Minute Circle Island Flight of Maui. This flight is identical to those two but joins them together into one flight. The discrepancy in air time is partially due to the fact that you will only be taking off and landing just one time, which earns you some air time.
Hana/Crater Helicopter Flight/5632″>45 minute Hana/Crater Helicopter Flight
30 Minute West Maui Flights