NU Car car rentals Los Angeles Airport will hold your reservation for 2 hours if you are late, as long as the 2-hour window occurs between 8 am and 4:30 pm on weekdays and 8 am and 4 pm on weekends. Their courtesy shuttle from the terminal to the agency branch on Century Boulevard operates only during these hours. However, the agency is open until 10 pm on weeknights and 7 pm on weekends.