So many variables to this question. It's going to vary for the different services and platforms. Fleet flight time will vary depending on community. I flew multi-engine props, the C-2A Greyhound, three different tours in a row (fleet, FRS, fleet) and my flight time sucked. Unless on deployment or on an FCLP/CQ det, we didn't fly a whole lot for various reasons (maint, money, etc). There are months where I have 2-5 hours in my log book. That was from 98-2006, things might very well be different now.

In the Navy, if you want flight time, go the training command route. Even then, it can vary. Back in 07-09, I was an associate pilot at TW-5 at Whiting Field flying the T-34C with VT-6. I was generally able to get scheduled for about 25-30 hours a month and usually flew only 15-20 hours a month, most flights cancelled due to weather. Those in the squadrons were flying 40-60 hours a month (one good buddy flew 1800 hours in just over 3 years with VT-3). I never flew cross countries and that hurt me a bit. Now that I'm with TW-2 flying the T-45C, I get 2X's a day, average 30 hours a month. The squadron pilots will average that and up, some get 50-60 hours a month. I'm on pace to get 350 hours this year alone. Squadron pilots have logged over 400 easily. It's very good flying.