if I have to extend my rental by possibly 4 or 5 hours, is there an add'l charge. MY vehicle was to be returned at noon but my flight was changed to 5 hours later. Rather than sitting in the airport, I would like to return the vehicle a little

Good

I had no extra charge. I extended my rental 4 hrs.

I agree with the above answer. I would also call them and ask about their policy. Our flight was an hour late coming into Orlando, so we were late picking up our rental. Fox was very nice and didn't charge us anything extra.

Usually a per hour fee is charged after a 24 hour increment, and after about 3 hours it will just be another day rental. Check what time you picked up the car.