It would be the dawn of a new age, intrepid pilots winging into the skies for the first time with the U.S. mail. A letter from Washington could reach Philadelphia in an hour and a half, and New York ...

A century ago, the Pan American Exposition was held in Buffalo, N.Y. — and postal history was made.On that opening day in 1901, what was then known as the U.S. Post Office issued a set of bicolored ...

An ultra-rare stamp depicting an upside-down aircraft has sold for $2 million at a New York auction, setting the record for the most expensive single U.S. stamp sold. The stamp, known as the "Inverted ...