Delta Air Lines Fleet Boeing 737-800 Details and Pictures. Delta’s 737-800 are identified as 73Y or 73H and may be displayed as such on booking itineraries or schedules. Delta Air Lines operates 77 narrow body aircrafts Boeing 737-800. Two-engine passenger airplane Boeing 737-800 and 737-700 belongs to the family of narrow-bodied aircrafts intended for short and […]