Why are leases so common in aviation?

Posted by Mike__O@reddit | aviation | View on Reddit | 155 comments

In the automotive world, leasing is considered to be BY FAR the most expensive way to own a car. Pretty much every person educated in finances strongly advises against leasing because it will cost you substantially more in the short term with no long-term payoff at the end.

It seems very different in the aviation world. Leasing is incredibly common. Airlines lease airframes, engines, APUs, and avionics. Sometimes the entire airplane is leaseed, sometimes parts of it are.

How does the economics of airplane leasing work that make it more appealing to penny-pinching airlines? Is it just a matter of lack of available capital/debt capacity?