Airports › Chicago (MDW) › December 2025
Airport month · December 2025
Chicago Midway International in December 2025
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.
In December 2025, reporting carriers scheduled 5,738 domestic departures from Chicago Midway International (MDW). 67.8% left less than 15 minutes late and 69.3% reached their destination on time; 0.5% were cancelled.
Nationally that month, 72.0% of flights departed on time and 71.9% arrived on time, so MDW departures were 4.2 points below the national departure figure.
A year earlier, in December 2024, the airport had 5,949 departures with 75.1% leaving on time: a change of −7.3 points, with flights down 4%.
Flights arriving at MDW that month were on time 72.3% of the time (5,736 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 40%, air carrier 31% and national aviation system 25%.
- On time 69.3%
- Arrived 15+ minutes late 30.2%
- Cancelled 0.5%
- Diverted 0.1%
December 2025 against a year earlier, the airport's year and the nation
| Measure | Dec 2025 | Dec 2024 | MDW, 12 months to Jul 2026 | All reported flights, Dec 2025 |
|---|---|---|---|---|
| Departed on time | 67.8% | 75.1% | 70.7% | 72.0% |
| Arrived on time | 69.3% | 79.3% | 73.9% | 71.9% |
| Cancelled | 0.5% | 0.5% | 1.5% | 1.5% |
| Average departure delay (late minutes only) | 18.5 min | 13.9 min | 16.5 min | 21.2 min |
| Scheduled departures a day | 191 | 198 | 202 | 19,410 |
| Scheduled departures | 5,738 | 5,949 | 73,744 | 582,304 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| WN Southwest Airlines | 5,371 | 94% | 69.3% | 11.4 min | 0.3% |
| F9 Frontier Airlines | 154 | 3% | 65.6% | 27.2 min | 1.3% |
| DL Delta Air Lines | 117 | 2% | 80.3% | -3.2 min | 7.7% |
| OO SkyWest Airlines | 81 | 1% | 55.6% | 42.7 min | 1.2% |
| G4 Allegiant Air | 15 | 0% | 73.3% | -4.0 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| MDW–ATL | Chicago to Atlanta | 290 | 75.5% | 5.8 min | 3.1% |
| MDW–PHX | Chicago to Phoenix | 242 | 66.1% | 13.5 min | 0.8% |
| MDW–MCO | Chicago to Orlando | 241 | 75.1% | 8.7 min | 0.0% |
| MDW–MSP | Chicago to Minneapolis | 214 | 61.2% | 23.6 min | 0.9% |
| MDW–LGA | Chicago to New York | 198 | 61.6% | 21.8 min | 2.0% |
| MDW–DEN | Chicago to Denver | 197 | 57.9% | 20.6 min | 1.0% |
| MDW–DAL | Chicago to Dallas | 190 | 73.7% | 7.0 min | 0.0% |
| MDW–LAS | Chicago to Las Vegas | 185 | 68.1% | 11.5 min | 0.0% |
| MDW–DCA | Chicago to Washington | 173 | 67.1% | 11.6 min | 0.0% |
| MDW–MCI | Chicago to Kansas City | 166 | 71.1% | 7.9 min | 0.6% |
| MDW–BNA | Chicago to Nashville | 152 | 80.3% | 6.1 min | 0.0% |
| MDW–HOU | Chicago to Houston | 146 | 70.5% | 9.4 min | 0.7% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left MDW on time in December 2025?
67.8% of 5,738 scheduled domestic departures left less than 15 minutes late, and 69.3% reached their destination on time. The national figures that month were 72.0% and 71.9%.
How does that compare with a year earlier?
In December 2024, 75.1% of 5,949 departures left on time and 0.5% were cancelled, against 67.8% and 0.5% in December 2025.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for December 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for MDW · methodology · corrections.