30-45 straight focused no foreplay. Depends on activity, maybe longer but to be honest, I may go 30-40 and switch it up to some oral, toys, whatever and come back to my business. I make sure to get in a dozen on so "O"'s with my lady be for I finish off.
45min - 1 hr, without foreplay. And, i usually have to stop a couple times to catch my breath and stop panting. We have very athletic sex and I'm often dripping with sweat when its over, as is she. Oh, and we typically have to use lube to go this long.