Children ages 2 or older are required to purchase an air seat for all travel.<br/><br/> <strong>For Travel within the United States and Puerto Rico:</strong> If an infant will be traveling as a Lap Child, leave the infant out of the traveler count when booking. Arrangements can be made upon arrival at the airport. If an age is entered for the child, a seat will be booked. Proof of age (i.e. Birth Certificate or Passport) is required for all infants and children at time of airport check-in. <br/><br/> <strong>For Travel to Mexico and The Caribbean:</strong> If your infant will be traveling as a Lap Child, <strong>you <em>must</em> contact our Customer Care Center</strong> to make arrangements at least 7 days prior to departure. Please note that the hotel may assess a charge when adding an infant to your room reservation. A valid Passport is required for all infants and children at time of airport check-in. <br/><br/> Please contact our Customer Care Center at 1-800-243-8372 for further assistance.