Can you smoke in most airports?

Absolutely not.

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Not today. Many years ago, planes used to have a smoking section at the rear of the plane for anyone who wanted to smoke during the flight. Some older plane like the Boeing 707 and 727 and the Douglas DC-9 still have ash trays in the seat arm rests. But smoking is absolutely not tolerated on planes anymore. If I'm correct, the last time this was allowed was in the 1970s or early 1980s. ---------------------

I flew on Varig in 1996 from L.A. to Sao paulo and the whole back section of the plane was smoking. The smoke got filtered I think because the plane was not smokey.