A bold new vision for first class emerges, with fewer suites and more space than ever before.

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 ...

JetBlue, which currently offers its highest-end Mint service with lie-flat seats on select long-haul routes, plans to introduce a domestic first class–style product on aircraft that do not have Mint ...