DAL/DL Type Model Cabins First flight Flights Flown B722 Boeing 727-200 Y 1988-10-1313 Oct 1988 2 2,161 MD81 McDonnell Douglas MD-81 Y 1988-10-1313 Oct 1988 1 1,190 B752 Boeing 757-200 Y 1988-10-2222 Oct 1988 1 2,168