Delta Airlines has unveiled its first-ever dedicated business class lounge, a feature both American Airlines and United Airlines have already offered for some years. The lounge, which services premium cabin customers flying the ‘Delta One’ routes, is located in terminal 4 between the A and B concourses of New York JFK, close to the main TSA checkpoint. Initially, it will operate on shortened hours from 11 a.m. to 11 p.m., but as of Thursday, it will function from 4:30 a.m. Similar lounges are also planned for Boston and Los Angeles in the subsequent months.