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.
Most boys grow the fastest at age 14 (when late in puberty) and stop growing at age 16. In brief: 4 years. Typically about 4 years from beginning of testicular enlargement, with some variation. Most boys grow the fastest at age 14 (when late in puberty) and stop growing at age 16. In brief: 4 years. Typically about 4 years from beginning of testicular enlargement, with some variation. Most boys grow the fastest at age 14 (when late in puberty) and stop growing at age 16.