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.
After 2 years of age, growth continues at a slower but steady rate of 21/2 inches (6.3 cm) per year until about the age of 11 in girls and 13 in boys, when the growth spurt that goes along with adolescence usually begins.