The next time you board a plane and walk through First Class on the way to your cramped coach seat, don't be jealous.If it's a domestic flight, at least, you could be sitting there too, Airfarewatchdog.com has found.
You may think airlines are evil and would rather have empty seats in first or business than see the likes of you sneaking in. Wrong. If the seat has not been sold, or is not being filled by a loyal frequent flyer, it's entirely possible that you could have upgraded your ticket — sometimes for less than you'd think.
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