Illustration: Zohar Lazar Alex, as we’ll call him, works for a global manufacturing company — a successful one with far-flung clients Alex visits weekly, sometimes aboard a private jet. His wife, who often joins him on the road, prefers a different mode of travel, and Alex generally lets her decide which one they use when they visit places together. That mode of travel is Delta 360°, the somewhat mythical elite-service tier offered by invitation only by America’s most successful airline. “Can