Thought some of your might find these figures interesting. these two postings list cost per operating hour for several Air Force aircraft including C-130H and C-130J that are also operated by the Coast Guard. (There is a real surprise here in that the costs to operate the C-17 are essentially the same as for the C-130H.)

Fighters, Bombers, Airlifters, and ISR and C2 aircraft here. The F-22, CV-22, and some very exotic aircraft here.