Programs have widely varying minimum daily and segment flight time charges. A 40-minute flight might be charged as one hour by one provider, two hours by another, and 40 minutes by a third. If you are taking a lot of short flights, you will want to pay attention to this. Minimums are typically one to two hours and can depend on the size of the plane. If you multiple same-day short hops, a program with only a daily minimum may be advantageous.