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.
1 Girls start to grow underarm hair and pubic hair, and have a growth spurt. 2  They start having menstrual periods about 2 to 3 years after their breasts start to develop. 3  For boys, puberty usually starts between ages 9 and 14 years. 4  The testicles and penis get larger. For boys, puberty usually starts between ages 9 and 14 years. 2  The testicles and penis get larger. 3  Boys start to grow underarm hair, pubic hair, and facial hair. 4  Their voices deepen and they have a growth spurt.