Delta to open a new tier of 'premium' airport lounges this year in high-end travel push

Delta Air Lines' popular airport lounges are getting a more exclusive tier, in the airline's latest push to cater to high-spending travelers.The first "premium" lounge is scheduled to open in June at New York's John F. Kennedy International Airport, and at 38,000 square feet, it will be the largest of the carrier's lounges, Delta said on Thursday. Other high-end Delta lounges will open in Boston and Los Angeles later this year.Delta has been building up its network of Sky Clubs in recent years to cater to s ...