Boeing 727-200
Northwest Orient Airlines Boeing 727-251, N201US, is shown at San Diego Lindbergh Field in November 1982.
Northwest Airlines Boeing 727-251, N269US, is shown in Fort Lauderdale in December 1989 wearing the shortened "Northwest" titles.  
The word "Orient" was dropped from the company's name following the company's merger with Republic Airlines.
Northwest Airlines Boeing 727-277, N275WC, is shown at San Diego in August 1987 wearing basic Republic Airlines colors with
Northwest titles following the merger of the two carriers.
Northwest Airlines Boeing 727-251, N255US, is shown at Fort Lauderdale in in March 1993 wearing the carrier's updated color
scheme which was introduced in 1989.