Airlines at Chicago Midway International Airport (MDW)
Chicago, Illinois KMDW #31 US airport by passengers
Airlines operating at MDW, ranked by number of departures.
On-time performance at MDW
Based on 20,485 departures from May 2026 to July 2026. A flight counts as late when it leaves 15 or more minutes after schedule.
37.2%Departures late
27.7%Arrivals late
1.39%Cancelled
22.1 minAverage departure delay
| Airline | Departures | Late |
|---|---|---|
| Southwest Airlines | 19,723 | 37.8% |
| Delta Air Lines | 348 | 19.0% |
| Frontier Airlines | 281 | 21.4% |
| Allegiant Air | 115 | 31.3% |
Source: Bureau of Transportation Statistics, On-Time Performance of reporting carriers. Smaller regional carriers and some airlines are not included.
Airline presence
Southwest Airlines is the largest carrier at Midway, with a large domestic network. Delta, Allegiant, Frontier and Avelo also serve the airport, and Volaris flies to Mexico from Concourse A.