| ICAO code | KZAU |
| Country | United States |
| Type | Flight Information Region |
| Center | 42.11215, -89.14165 |
| Airports | 1,409 |
| NOTAM | Chicago FIR NOTAMs |
| METARs | 120 |
| SIGMETs | 0 |
| Size | 255,822 km2 |
| Adjacent |
| ID | Name | IATA | METAR | City | Region | Type |
|---|---|---|---|---|---|---|
| IL95 | Corn Field | Custer Park | Illinois | Small airport | ||
| 8IS5 | Raymond Classen Memorial Airport | Danforth | Illinois | Small airport | ||
| IS88 | Melody Field | Danville | Illinois | Small airport | ||
| IL00 | Welch Heliport | Danville | Illinois | Heliport | ||
| 7IS4 | Danville Correctional Center Heliport | Danville | Illinois | Heliport | ||
| 93IS | OSF Healthcare Sacred Heart Medical Center Heliport | Danville | Illinois | Heliport | ||
| IL23 | Ellis Airport | Davis | Illinois | Small airport | ||
| 0IS3 | Cady Aerial Airport | Deer Grove | Illinois | Small airport | ||
| 0IL6 | Northwestern Memorial Healthcare Heliport | De Kalb | Illinois | Heliport | ||
| IS80 | Uncle Chuck's Airport | De Kalb | Illinois | Small airport | ||
| IL80 | Flying Illini Airport | De Land | Illinois | Small airport | ||
| 0IL9 | Jack W Watson Airport | De Kalb | Illinois | Small airport | ||
| 6IS5 | Presence Holy Family Medical Center Heliport | Des Plaines | Illinois | Heliport | ||
| 49IS | Katherine Shaw Bethea Hospital Heliport | Dixon | Illinois | Heliport | ||
| 78IL | Dixon Correctional Center Heliport | Dixon | Illinois | Heliport | ||
| 0IL4 | Advocate Good Samaritan Hospital Heliport | Downers Grove | Illinois | Heliport | ||
| LL22 | Brookeridge Air Park Airport | Downers Grove | Illinois | Small airport | ||
| 65IL | Teubel Airport | Dunlap | Illinois | Small airport | ||
| 2IL1 | McCartney Airport | Durand | Illinois | Small airport | ||
| 9IL1 | Durand Ambulance Service Heliport | Durand | Illinois | Heliport | ||
| 47IS | Flying Z Ranch Airport | Durand | Illinois | Small airport | ||
| 61IS | Jim & Peg Airport | Dwight | Illinois | Small airport | ||
| 2IL2 | Watters Airport | Dwight | Illinois | Small airport | ||
| 08LL | Sauer Airport | Dwight | Illinois | Small airport | ||
| IL99 | B & C Airport | Earlville | Illinois | Small airport | ||
| 06IL | Humm Airport | Earlville | Illinois | Small airport | ||
| IL55 | Younglove/Otterbach Airport | Earlville | Illinois | Small airport | ||
| 2IL3 | McNeal's Field | East Moline | Illinois | Microlight airfield | ||
| 2IL8 | Il Department Of Transportation Heliport | Elgin | Illinois | Heliport | ||
| IS20 | Presence St. Joseph Hospital-Elgin Heliport | Elgin | Illinois | Heliport | ||
| 25LL | Advocate Sherman Hospital Heliport | Elgin | Illinois | Heliport | ||
| 23IL | Amita Health-Alexian Brothers Medical Center Heliport | Elk Grove Village | Illinois | Heliport | ||
| 7IL6 | Elmhurst Memorial Hospital Heliport | Elmhurst | Illinois | Heliport | ||
| 2IS3 | Jackson Field | Elmira | Illinois | Small airport | ||
| 1IL0 | Barnstorm Field | El Paso | Illinois | Small airport | ||
| 74IL | Corn Alley 2 Airport | El Paso | Illinois | Small airport | ||
| 8IL6 | Kingdon Rla-H Heliport | El Paso | Illinois | Heliport | ||
| 3IL2 | Sweedler Airport | Elwood | Illinois | Small airport | ||
| IS15 | Vodden Airport | Esmond | Illinois | Small airport | ||
| II31 | Jurassic Landings | Essex | Illinois | Microlight airfield | ||
| 26IS | Ficklin-Airtech Airport | Fairbury | Illinois | Small airport | ||
| 4IL2 | Wayne Ziller Jr. Airport | Fairbury | Illinois | Small airport | ||
| IS26 | Niklaus Airport | Farmer City | Illinois | Small airport | ||
| 62IS | Wilson Airport | Fithian | Illinois | Small airport | ||
| 64IS | Precision Chrome Heliport | Fox Lake | Illinois | Heliport | ||
| IL44 | Arrow Heliport | Fox Lake | Illinois | Heliport | ||
| 15IL | Gittleson Farms Airport | Franklin Grove | Illinois | Small airport | ||
| 50IS | FHN Memorial Hospital Heliport | Freeport | Illinois | Heliport | ||
| IL47 | Freeport/Dornink Airport | Freeport | Illinois | Small airport | ||
| 13IL | Midwest Medical Center Heliport | Galena | Illinois | Heliport |