I cannot make a reservation before 4.30am or after 11.30pm, what should I do? 10 April 2022 14:58 Updated The valet service is open from 4.30am to 11.30pm, which is why only these times are available for booking. Related articles How to contact Blue Valet Customer Service? What happens if my delay reschedules my return after 11:30pm? What hours should I fill out when booking? When should I make my reservation? Do I have to warn you if my return flight/train is delayed?