With our user-friendly mobile app, you can book, unlock, and drive whenever you want one of your chosen vehicles. All within a few taps! With 24/7 access to our fleet, you can book a car whenever needed: book Roundtrip Cars and Vans up to a year in advance, perfect for longer trips, or just reserve a one-way Flex car when you’re ready to go. Zipcar is your solution to simplicity and flexibility.