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.
This is followed a few months later by the growth of pubic hair. Puberty continues with an increase in the size of the testicles and penis and continued growth of pubic and axillary hair. Boys undergo their peak growth spurt about 2-3 years later than girls. Also, this usually begins with an enlargement of the hands and feet and is later followed by growth in the arms, legs, trunk, and chest.