It's odd but, even on very long flights, e.g. LAX to HKG, I don't feel much urge to smoke. However, as soon as I get to the airport, I can't wait to get out on the street (or, in China, to a smoking lounge) and light up. Similarly, when I fly through Denver I make a beeline for the smoking bar, but if I'm flying though Chicago, I'm fine waiting sans smoke in the Red Carpet Club.

I remember well the days when aircraft had smoking sections. I hated to sit there -- it was always smelly and smoky and, of course, in the very back of the plane. I'd sit in the non-smoking section and, if the urge hit me, walk back for a quick smoke.

I appreciate airports with smoking areas but I can manage quite effectively with a cigarette on long-haul flights.