When you're a student you have to fly at least 50 nautical miles for it to count towards your "5 hours of cross country experience". But once you've gotten your ticket, merely landing at a different airport than you took off from is logged as "cross country". When the kids aren't in school, I occasionally fly from C62 to SMD to go to work (roughly a 20 nm trip - 8 minutes flying beats hell out of 45 minutes driving). But that time, according to the regs, is to be logged as "cross country" time.