Airports in Illinois
All airports closest to Illinois's geographic center, ranked by the number of scheduled departures on file. Click any IATA code to see the airport's destinations, operators, and route table.
| IATA | Airport | City | Departures |
|---|---|---|---|
| ORD | Chicago O'Hare International Airport | Chicago | 558 |
| MDW | Chicago Midway International Airport | Chicago | 139 |
| PIA | General Wayne A. Downing Peoria International Airport | Peoria | 15 |
| MLI | Quad City International Airport | Moline | 15 |
| BMI | Central Illinois Regional Airport at Bloomington-Normal | Bloomington | 12 |
| RFD | Chicago Rockford International Airport | Rockford | 5 |
| CMI | University of Illinois Willard Airport | Champaign | 4 |
| DEC | Decatur Airport | Decatur | 2 |
| BRL | Southeast Iowa Regional Airport | Burlington | 2 |
| BLV | Scott AFB/Midamerica Airport | Belleville | 1 |
| MWA | Williamson County Regional Airport | Marion | 1 |
| IKK | Greater Kankakee Airport | Kankakee | 0 |
| DPA | Dupage Airport | West Chicago | 0 |
| UGN | Waukegan National Airport | Chicago | 0 |
| SPI | Abraham Lincoln Capital Airport | Springfield | 0 |
| GYY | Gary Chicago International Airport | Gary | 0 |
| LOT | Lewis University Airport | Lockport | 0 |
| PWK | Chicago Executive Airport | Chicago-Wheeling | 0 |
| JOT | Joliet Regional Airport | Joliet | 0 |
| VYS | Illinois Valley Regional Airport-Walter A Duncan Field | Peru | 0 |
| CGX | Chicago Meigs Airport | Chicago | 0 |
| CWI | Clinton Municipal Airport | Clinton | 0 |
| EOK | Keokuk Municipal Airport | Keokuk | 0 |
| DNV | Vermilion Regional Airport | Danville | 0 |
| GBG | Galesburg Municipal Airport | Galesburg | 0 |
| ALN | St Louis Regional Airport | Alton/St Louis | 0 |
About this list
Illinois's airport list is built by taking every US airport in the source dataset, computing the great-circle distance from each airport to all 52 state centroids, and grouping the airport under the closest one. Every state ends up with a populated page that way, including the small states that share their nearest international gateway with a neighbour. The flip side is that a handful of airports very close to a state border get filed under the neighbouring side.
The departures column reflects the number of distinct scheduled routes recorded against each airport in the OpenFlights routes table. A high count usually indicates a hub or focus city for one or more carriers; a low count typically points to seasonal or single-carrier service. For an authoritative real-time view, always confirm schedules with the operating airline.
Connecting onward
Most travelers in Illinois reach long-haul destinations by connecting through a larger national or international hub. On any airport page below, the destinations table links straight through to the destination airport, where you can repeat the drill-down to see how onward connections fan out from there. Browsing this way gives you a feel for how a state plugs into the wider US and global network. Even small airports usually sit one or two hops away from any major world city.