Delta 360 is the airline's super-secret, invite-only status, but the only thing this special member's club has done is encourage me to fly the airline less. At the start of this year, I was at long last extended an invitation to join the elite Delta 360 program. Delta 360 Is a Failure of an Elite ProgramFor a solid three-month stretch this spring, the Delta 360 hotline was the most frequently dialed number in my phone. This is just the honest Delta 360 experience in all its glory. Not only is that not preboarding—it’s mid-boarding—but it’s also right where Diamond members “preboard.