First-time flight upgraders should be aware of business and first-class etiquette. A flight expert shared his top tips for blending in with passengers who often book premium cabins. He said not to ask ...

First-class fliers have a code. It’s subtle and usually comes with a glass of champagne. If you want fit in before you fall flat in a sea of stares, learn the unspoken rules—lest you mistake the amuse ...

First class is about indulgence, and business class is about sleeping and working comfortably, travel expert Gilbert Ott says.Christian Charisius/picture alliance via Getty Images When you board your ...