It's recommended to book you at least 24-48 hours in advance to ensure availability and to avoid any last-minute issues. However, during peak travel seasons or special events, booking even further in advance is best to ensure you can secure the vehicle you need. Additionally, some car service providers may offer discounts for bookings made well in advance. Always confirm your booking with the company and provide any necessary details, such as flight numbers and pick-up locations, to ensure a smooth and stress-free experience.