| 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 |
|---|---|---|---|---|---|---|
| KHXF | Hartford Municipal Airport | Hartford | Wisconsin | Midsized airport | ||
| I00 | Lake Shafer Seaplane Base | Monticello | Indiana | Seaplane base | ||
| I01 | Dallas Lake Seaplane Base | Lagrange | Indiana | Seaplane base | ||
| I04 | Quad-City Seaplane Base | Moline | Illinois | Seaplane base | ||
| I24 | Spring Bay Seaplane Base | Spring Bay | Illinois | Seaplane base | ||
| I26 | Corporal Jason G Pautsch Heliport | Rock Island | Illinois | Heliport | ||
| I27 | Elkader Airport | Elkader | Iowa | Small airport | ||
| I58 | Crooked Lake Seaplane Base | Angola | Indiana | Seaplane base | ||
| I72 | Westfield | Westfield | Indiana | Small airport | ||
| I76 | Peru Municipal Airport | Peru | Indiana | Small airport | ||
| IA8 | Dyersville Area Airport | Dyersville | Iowa | Small airport | ||
| IN0 | Big Turkey Lake Seaplane Base | Stroh | Indiana | Seaplane base | ||
| IN2 | Snow Lake Seaplane Base | Jamestown | Indiana | Seaplane base | ||
| IN4 | Cedarville Reservoir Seaplane Base | Leo-Cedarville | Indiana | Seaplane base | ||
| IN5 | Adams Lake Seaplane Base | Woolcottville | Indiana | Seaplane base | ||
| IN6 | Hudson Lake Seaplane Base | Hudson Lake | Indiana | Seaplane base | ||
| IN7 | Cedar Lake Seaplane Base | Cedar Lake | Indiana | Seaplane base | ||
| IN9 | Webster Lake Seaplane Base | North Webster | Indiana | Seaplane base | ||
| KIWH | Wabash Municipal Airport | Wabash | Indiana | Midsized airport | ||
| K98 | Allison Municipal Airport | Allison | Iowa | Small airport | ||
| M86 | Walle Field | Pullman | Michigan | Small airport | ||
| KOQW | Maquoketa Municipal Airport | Maquoketa | Iowa | Midsized airport | ||
| KRWN | Arens Field | Winamac | Indiana | Midsized airport | ||
| TF8 | Tinley Park Helistop | Chicago/Tinley Park | Illinois | Heliport | ||
| KTZT | Belle Plaine Municipal Airport | Belle Plaine | Iowa | Midsized airport | ||
| W11 | Sullivan Airport | Sullivan | Wisconsin | Small airport | ||
| W19 | Verona Airport | Verona | Wisconsin | Small airport | ||
| W23 | Wild Rose Idlewild Airport | Wild Rose | Wisconsin | Small airport | ||
| Z98 | Ottawa Executive Airport | Zeeland | Michigan | Small airport | ||
| IL01 | Wolford's Airport | Abingdon | Illinois | Small airport | ||
| 12IS | Genesis Medical Center-Aledo Heliport | Aledo | Illinois | Heliport | ||
| IS81 | Alsip Fire Department Heliport | Alsip | Illinois | Heliport | ||
| IL07 | Taylor Airport | Amboy | Illinois | Small airport | ||
| 50IL | Midland Airport | Antioch | Illinois | Small airport | ||
| IL11 | Donald Alfred Gade Airport | Antioch | Illinois | Small airport | ||
| 41IL | Great Lakes Seaplane Base | Antioch | Illinois | Seaplane base | ||
| IL28 | Foster Field | Apple River | Wisconsin | Small airport | ||
| 7IL4 | Northwest Community Hospital Heliport | Arlington Heights | Illinois | Heliport | ||
| IL94 | Hoblit Farms Airport | Atlanta | Illinois | Small airport | ||
| 3IL9 | Alekat Acres Airport | Atlanta | Illinois | Small airport | ||
| IL21 | Amita Health Mercy Medical Center/Aurora Heliport | Aurora | Illinois | Heliport | ||
| 7IS8 | Rush-Copley Medical Center Heliport | Aurora | Illinois | Heliport | ||
| IL08 | Advocate Good Shepherd Hospital Heliport | Barrington | Illinois | Heliport | ||
| IS12 | Urso Heliport | Bartlett | Illinois | Heliport | ||
| IL34 | Henderson Field | Belvidere | Illinois | Small airport | ||
| IL36 | Bob Walberg Field | Belvidere | Illinois | Small airport | ||
| IS83 | Untied Acres Airport | Belvidere | Illinois | Small airport | ||
| 0LL0 | Kaufield | Belvidere | Illinois | Small airport | ||
| 4IL9 | Unzicker Airport | Benson | Illinois | Small airport | ||
| 3IL7 | Koehler Heliport | Benson | Illinois | Heliport |