Check-in for air travel differs depending on your starting destination, your final destination, the airline you are flying and your travel day and time.
Boys continue growing until age 17 or 18. Boys and girls grow about two inches per year until they reach puberty. Then they each have a growth spurt that lasts a year or two. During the growth spurts, boys grow a little faster than girls. Girls reach puberty (on average) about a year before boys do. Girls also end puberty earlier than boys.
Weeks or months of slightly slower growth alternate with mini growth spurts in most children. Kids actually tend to grow a bit faster in the spring than during other times of the year! A major growth spurt occurs at the time of puberty, usually between age 8 to 13 years in girls and 10 to 15 years in boys. Puberty lasts about 2 to 5 years.