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.
When Do Boys Stop Growing? Infants grow so fast and so often in the first year most parents accept this as the norm, but nature plays a trick on us. After the age of two, this quick rate of growth slows down substantially to a turtle-like 2.5 inches (6 cm) per year, explains Dr. Mark Gettleman, a pediatrician and the founder of Dr. Goofy Gettwell Pediatrics. This steady state of growth remains until puberty, which starts around age 10 to 15 in boys. Puberty marks the beginning of numerous bodily changes in children and starts the first of many growth spurts, which will continue through the teen years and into early adulthood.