You may want to arrange your rental in advance so that you can pick up your car right at Antalya Airport, or to be sure that it will be available when you want it.
...has good arrangements with local car hire agencies and offers inclusive package deals:
If you're going farther afield—covering
more distance than just a day or two
of local rental—you might want to have
your rental set up with a larger company
by one of my recommended