Originally Posted by brendog

Even if I do end up finishing early, I always have something else going on, so I'm on the next available flight back to the office or to my next destination.

I don't think I've ever honestly had more than a spare hour or two on any of my biz trips in the last 15 years for any sightseeing, and my employer certainly would not countenance me doing so on company time (i.e., Any time I'm on the road for biz).