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.
A growth spurt normally lasts for two years and starts at different times for girls and boys. For girls, it typically starts around age 9 to 10. The fastest point is around 11 to 12 for girls. Boys usually start around age 11 and peaking at 13. During this time, boys typically grow about 4 inches each year.