Frontier Airlines, Inc., is an American airline headquartered in Indianapolis, Indiana, United States. The carrier, which is a subsidiary and operating brand of Republic Airways Holdings, operates flights to 83 destinations throughout the United States, Mexico, and Costa Rica and maintains hubs at Denver International Airport, Milwaukee's General Mitchell International Airport, and Kansas City International Airport. It provides regional service to the surrounding Rocky Mountain States through a code-share agreement with Great Lakes Airlines. Frontier is not a member of an air carrier alliance.
The Wisconsin Center (formerly Midwest Express Center, Midwest Airlines Center, Frontier Airlines Center and Delta Center) is a convention and exhibition center located in downtown Milwaukee, Wisconsin. The center is part of a greater complex of buildings which includes the UW–Milwaukee Panther Arena and the Milwaukee Theatre, and was a replacement for the former Great Hall portion of the MECCA Complex.