You'll need to do some work to get into the job though, since it requires that you either know someone in the business, or you get into the union on the ground floor. That means that you won't be making the big bucks right away, but you'll definitely be making a living wage at least. I'm a big proponent of any job with a union because they will protect your wages. Be good to the union, and the union will be good to you.
There are many different places to work other than an airport as a cargo loader. You can work on the coasts loading cargo for bigger shipments which is actually where the money is. If this is a job you're interested in, I would consider moving to the East coast where all the real action is.