If they are pilots, they are officers most likely (or Warrants), which means they have at least a 4 year degree and often a Master's before entering OCS and ski

If they are pilots, they are officers most likely (or Warrants), which means they have at least a 4 year degree and often a Master's before entering OCS and skills training (skills like flight training which takes about 12 months). Sure you can fast track some of this (there's a flight school program that's only 9 months), or you could get your education at West Point or something, and get out of flight school at maybe 21-22, but that's not the norm. I'd put their ages no younger than 23 on the low end. More typically mid to late 20s with a few in their 30s (usually Warrant Officers).