Most hotels require that guests be at least 18 years old to book a room and stay alone. However, some hotels have higher age requirements, which can vary from 21 to 25 years old. It is important to check the hotel's age policy before booking to avoid any issues upon arrival.

In the United States, the general legal age to check into a hotel without a parent or guardian is 18, as this is the age at which an individual can legally sign a binding contract. However, many hotels—particularly in major "party" or high-traffic destinations like Las Vegas, Miami Beach, and New York City—voluntarily set a higher minimum age of 21. This is often done for insurance reasons, to comply with local gaming laws (if the hotel has a casino), or to limit the hotel's liability regarding underage drinking from in-room minibars. In some rare cases, such as specific resorts in the Florida Keys, the minimum age can be as high as 25. High-fidelity travel planning in 2026 requires checking the specific "Check-in Policy" on the hotel's website before booking, as being 18 is not a guaranteed "right" to a room. If you are under 21, it is best to carry a major credit card in your own name, as many hotels will refuse a debit-only guest who is near the age limit, even if they meet the minimum age requirement.