May 15, 1983
Maps generated by the Great Circle Mapper - copyright © Karl L. Swartz.
American
Central
Airlines
Cadillac
Manistee
Marshfield
Wisconsin Rapids
Sheboygan
Chicago
O'Hare
Beloit/
Janesville
Clinton
Dubuque
Minneapolis/
Saint Paul
Lincoln
Omaha
Sioux
City
Rochester
Mason
City
Ottumwa
Des Moines
Waterloo
Cedar Rapids
Moline