In this articleDALThe bar at the Delta One lounge at New York's John F. Kennedy International Airport.Leslie Josephs | CNBCDelta Air Lines' most exclusive airport lounge opens this week to travelers flying on the right ticket.The Delta One lounge at the carrier's hub in John F. Kennedy International Airport will open Wednesday to customers departing or arriving in the Delta One cabin, the airline's highest tier of service. It's U.S. airlines' latest effort to win over top-paying customers. CNBC got a peek i ...