DAL/DL Type Model Cabins First flight Flights Flown B722 Boeing 727-200 Y 1989-05-077 May 1989 5 6,512 MD88 McDonnell Douglas MD-88 Y 1989-05-077 May 1989 4 4,760 B752 Boeing 757-200 Y 1989-09-1414 Sep 1989 1 1,614