A portion of the working section of K.I. Sawyer AFB has been converted into Sawyer International Airport , which replaced the smaller Marquette County Airport , just southwest of Marquette , as the region 's primary civilian airport .
A portion of the operational section of K.I. Sawyer AFB has been converted into Sawyer International Airport , which opened its passenger terminal for service in September 1999 . 
 It replaced the smaller Marquette County Airport , just southwest of Marquette , as the region 's primary civilian airport .