Does a 4 year child requires ticket?

Whether a 4-year-old child requires a ticket depends on the specific policies of the event or transportation provider. Many airlines and venues allow children under a certain age, often around 2 years old, to travel for free or at a reduced rate if they sit on a parent's lap. However, for children over that age, a ticket is usually required. It's best to check the specific guidelines of the service you plan to use.