| - Michigan City Airport
FAA / IATA Airport Code: MGC
Michigan City, IN
- Porter County Municipal Airport
FAA / IATA Airport Code: VPZ
Valparaiso, IN
- South Bend, IN - Michiana Regional Airport
FAA / IATA Airport Code: SBN
South Bend, IN
- Gary, IN
FAA / IATA Airport Code: GYY
Gary, IN
- Ross Field Airport
FAA / IATA Airport Code: BEH
Benton Harbor, MI
- Meigs Field Airport
FAA / IATA Airport Code: CGX
Chicago, IL
- Chicago, IL - Midway
FAA / IATA Airport Code: MDW
Chicago, IL
- Margny
FAA / IATA Airport Code: XCP
Compiegne, IL
- Chicago, IL - Pal-Waukee Airport
FAA / IATA Airport Code: PWK
Chicago, IL
- Kentland Municipal Airport
FAA / IATA Airport Code: KKT
Kentland, IN
- Grissom Air Force Base
FAA / IATA Airport Code: GUS
Peru, IN
- Greater Kankakee Airport
FAA / IATA Airport Code: IKK
Kankakee, IL
- Kirsch Municipal Airport
FAA / IATA Airport Code: IRS
Sturgis, MI
- Chicago, IL - O'hare International Airport
FAA / IATA Airport Code: ORD
Chicago, IL
- Kokomo Municipal Airport
FAA / IATA Airport Code: OKK
Kokomo, IN
- Kalamazoo-Battle Creek Intl Airport
FAA / IATA Airport Code: AZO
Kalamazoo, MI
- Lafayette, IN - Purdue University Airport
FAA / IATA Airport Code: LAF
Lafayette, IN
- Schaumburg Marriott Heliport
FAA / IATA Airport Code: JMH
Chicago-Schaumburg, IL
- Dupage Airport
FAA / IATA Airport Code: DPA
Chicago (West Chicago), IL
- Fort Wayne, IN - Baer Field
FAA / IATA Airport Code: FWA
Fort Wayne, IN
- Marion Municipal Airport
FAA / IATA Airport Code: MZZ
Marion, IN
- W. K. Kellogg Airport
FAA / IATA Airport Code: BTL
Battle Creek, MI
- Aurora Municipal Airport -- also ARR
FAA / IATA Airport Code: AUZ
Chicago-Aurora, IL
- Vermilion County Airport
FAA / IATA Airport Code: DNV
Danville, IL
- Grand Rapids, MI - Kent County International Airport
FAA / IATA Airport Code: GRR
Grand Rapids, MI
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