I get close to the 10 minute mark on my T-Rex 450. But for me when that pack is done I am ready for a break. Especially when first starting to learn.
I have 3 battery packs and I keep 2 chargers going at a 1C rate. Along with my short breaks I can pretty much fly as much as I want. I got 12 flights in yesterday.
I have a Nitro Heli but haven't flown it yet but based on my nitro airplanes you won't get much longer flights from them either.