From Travelocity, the nearest airports are (they moved the search, choose flights, then the find nearest airports if off on the left in very tiny print under flight tips)

The format of the poorly reproduced table is airport code, location, number of miles away , and direction.

GYY GARY,IN,US 18 W
CGX MEIGS FIELD CHIC I,IL,US 33 NW
MDW CHICAGO MIDWAY AIR,IL,US 38 W
SBN S BEND,IN,US 39 E
ORD CHICAGO OHARE,IL,US 50 NW
PWK PAL-WAUKEE,IL,US 55 NW
AUZ AURORA MUN,IL,US 74 W
LAF LAFAYETTE,IN,US 83 S
AZO KALAMAZOO,MI,US 89 NE
MKE MILWAUKEE,WI,US 102 NW