"When planes aren't flying there aren't long lines there and the baggage office can give those out, " Leff said.

WSJ: What to do if you're stranded by American Airlines

Leff, who has only ever flown first-class, has loyalty card status on all U.S. airline programs and currently has three million miles across all his accounts.

CNN: The fabulous lives of air miles millionaires

Like Balkan, and other airmiles millionaires, Leff, makes it his business to know every airline promotion and use smart strategies to gain more miles which they can exchange for perks.

CNN: The fabulous lives of air miles millionaires