This page will list airports with scheduled passenger service in the U.S. by state.
Summary: Total: 5 commercial airports; 14? airlines
EVV Evansville, Evansville Regional Airport (38 03N, 87 31W, 418 ft) American Eagle, ATA Connection, Delta Connection/Comair/ASA, Northwest Airlink/Mesaba/Pinnacle
FWA Fort Wayne, Fort Wayne International Airport (40 58N, 85 12W, 815 ft) American, ATA, Continental, Delta Connection, Northwest, United
GYY Chicago/Gary, Gary Chicago International Airport (41 37N, 87 25W, 591 ft) Casino Express, Hooters Air
IND Indianapolis, Indianapolis International Airport (39 43N, 86 18W, 797 ft) Air Canada Jazz, American Eagle, America West, ATA Connection (hub), Continental Express, Delta Connection, Frontier, Independence Air, Midwest Connect, Northwest, Southwest, United Express, US Airways/US Air Express
SBN South Bend, South Bend Regional Airport (41 42N, 86 19W, 799 ft) ATA Connection, Continental Connection/CommutAir, Delta Connection/Comair, Northwest, United Express
Airlines: Air Canada Jazz American Airlines/American Eagle American TransAir (ATA) America West ATA Connection/Chicago Express Casino Express Chautauqua Airlines (hub: Indianapolis) Continental/Continental Express/Continental Connection/CommutAir Delta Airlines/Delta Connection/Comair/ASA Frontier Airlines Hooters Air Independence Air MidWest Connect Northwest Airlines/Northwest Airlink/Mesaba/Pinnacle Southwest Airlines United Airlines/United Express US Airways/US Air Express