A ticket is a voucher that indicates that an individual is entitled to admission to an event or establishment such as a theatre, amusement park, or tourist attraction, or has a right to travel on a vehicle, such as with an airline ticket, bus ticket or train ticket. An individual typically pays for a ticket, but it may be free of charge. A ticket may serve simply as proof of entitlement or reservation. A ticket may be valid for any seat (called "free seating" or "open seating") or for a specific one (called "allocated seating" or "reserved seating").

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A paper ticket often is perforated so it can be separated into two parts, one (the ticket stub) to be kept by the customer, and one to be kept by the ticket controller. Whether or not one can leave and reenter with the customer's ticket stub only varies. It may not be allowed to avoid subsequent use of one ticket by multiple people, or even simultaneous use by giving the ticket to someone before the ticket check (if this is physically possible), but it may also be allowed, e.g., in a movie theatre to allow the stub holder to use the facilities (restroom, telephone, water fountain) or buy, during a movie, a snack or drink before the ticket check and reenter.

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