There are many different factors to consider when deciding when to reserve a limo. For example, you'll need to think about the purpose of the rental, the size of the group, and the date and time of the event.  If you're renting a limo for a special occasion like a wedding or prom, it's best to reserve it as early as possible. This will give you the widest selection of vehicles and dates. However, you should also be aware that prices tend to increase as the date of the event gets closer.  If you're looking for transportation to and from an airport or hotel, you can usually get away with reserving a limo a few days in advance. And if you're part of a large group, you may be able to get a discount by reserving several weeks ahead of time.  But, ultimately, there is no one-size-fits-all answer to this question. The best time to reserve a limo depends on your specific needs and situation.