Yes, Uber is available 24 hours a day but in smaller markets you may struggle to find a ride in a timely fashion. Also, there are a few considerations you need to think about when utilizing the service during off peak hours.
Can you book an Uber for a certain time?
Request a ride up to 90 days in advance at any time of the day. Make sure to book a Reserve trip more than two hours prior to your departure to access the full benefits of the trip. To book a Reserve trip, go to the Uber app on your mobile device and: Select Reserve on the home page in the app.