I hope he's not travelling economy!
Worst I ever did was fly LHR/ABZ at 0700, go to clients office to deliver a piece of software and then get back on the plane at about noon.
Mind you, back when I was a Travel Agent (many, many years ago) I did a trip to Athens and back just for the fun of it (one hour on the ground), and a weekend in Rio but they were for the "fun" of it.