JetBlue is always curious and loves the smallest customers on the board. The details to travelling with Lap Infants are listed below: Travelling within the U.S. Travellers who want to travel with Lap Infants should information to the reservation staff or in case you want to add the Lap Infant to the existing booking then contact the reservation staff of JetBlue. Travelling internationally You need to get a valid passport for you and the lap infant. One must present the infant’s passport to the JetBlue executives before boarding the flight. The travelling fare for the lap infants depends upon the international destination and the point of origin of the journey. One should be the legal guardian and must possess the authorization letter (notarized). Age requirements A lap infant isa child whose age lies between 3 days to 2 years. No cost is required to add lap infants to the existing booking. In case, the lap infant exceeds the age of 2 years on the return flight then one has to purchase a separate seat for the infant. Age proof is mandatory like Birth Certificates, passports, and Immunization records. Other vital information  You would be of 14 years or more to travel with an Infant.  The infant should be sitting on the lap of the adult during landing and takeoff.  With one adult, only one lap infant is allowed.  It is not allowed that Lap infants to be seated against or in emergency exit rows.  The infant should be seated on the same row, so select the seat accordingly.