rentalguy and Pam,

I have a question regarding the rental period and if it has been asked and answered already, I apologize...

I have a reservation for two days renting from 3pm to 3pm. Now it looks like my return flight needs to be changed to 6:30pm. If I return the car at 4pm instead of 3pm, would I be charged for the extra hour? Is there a grace period for car return and if so, how long is the grace period?