Airports › Chicago (ORD) › September 2023
Airport month · September 2023
Chicago O'Hare International in September 2023
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 September 2023, reporting carriers scheduled 22,384 domestic departures from Chicago O'Hare International (ORD). 79.8% left less than 15 minutes late and 77.1% reached their destination on time; 0.6% were cancelled.
Nationally that month, 80.5% of flights departed on time and 80.1% arrived on time, so ORD departures were 0.7 points below the national departure figure.
Flights arriving at ORD that month were on time 80.9% of the time (22,368 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 41%, late-arriving aircraft 38% and national aviation system 19%.
- On time 77.1%
- Arrived 15+ minutes late 22.0%
- Cancelled 0.6%
- Diverted 0.3%
September 2023 against a year earlier, the airport's year and the nation
| Measure | Sep 2023 | Year earlier | ORD, 12 months to Jul 2026 | All reported flights, Sep 2023 |
|---|---|---|---|---|
| Departed on time | 79.8% | — | 71.4% | 80.5% |
| Arrived on time | 77.1% | — | 69.4% | 80.1% |
| Cancelled | 0.6% | — | 2.8% | 1.2% |
| Average departure delay (late minutes only) | 15.1 min | — | 22.3 min | 14.1 min |
| Scheduled departures a day | 746 | — | 986 | 18,978 |
| Scheduled departures | 22,384 | — | 359,911 | 569,338 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| UA United Airlines | 7,738 | 35% | 79.6% | 3.7 min | 0.8% |
| OO SkyWest Airlines | 5,006 | 22% | 71.1% | 16.2 min | 0.3% |
| AA American Airlines | 3,910 | 17% | 78.3% | 9.3 min | 0.6% |
| MQ Envoy Air | 1,733 | 8% | 79.8% | 3.6 min | 0.2% |
| YX Republic Airline | 1,065 | 5% | 86.3% | -0.4 min | 0.8% |
| DL Delta Air Lines | 923 | 4% | 76.8% | 15.2 min | 1.4% |
| WN Southwest Airlines | 853 | 4% | 74.4% | 7.3 min | 0.7% |
| NK Spirit Airlines | 692 | 3% | 74.0% | 7.6 min | 0.6% |
| AS Alaska Airlines | 310 | 1% | 73.5% | 7.8 min | 0.3% |
| B6 JetBlue Airways | 75 | 0% | 44.0% | 54.4 min | 2.7% |
| F9 Frontier Airlines | 75 | 0% | 57.3% | 20.7 min | 1.3% |
| 9E Endeavor Air | 4 | 0% | 100.0% | -5.5 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| ORD–LGA | Chicago to New York | 771 | 71.5% | 19.4 min | 4.0% |
| ORD–LAX | Chicago to Los Angeles | 599 | 78.1% | 3.5 min | 0.7% |
| ORD–BOS | Chicago to Boston | 552 | 64.1% | 26.1 min | 2.2% |
| ORD–DEN | Chicago to Denver | 546 | 81.1% | 3.3 min | 0.4% |
| ORD–DCA | Chicago to Washington | 520 | 76.0% | 15.4 min | 1.5% |
| ORD–DFW | Chicago to Dallas/Fort Worth | 520 | 80.6% | 6.6 min | 0.4% |
| ORD–LAS | Chicago to Las Vegas | 517 | 78.1% | 2.2 min | 0.4% |
| ORD–ATL | Chicago to Atlanta | 516 | 82.4% | 1.6 min | 0.0% |
| ORD–SEA | Chicago to Seattle | 496 | 82.7% | -1.1 min | 0.0% |
| ORD–PHX | Chicago to Phoenix | 489 | 82.8% | 2.0 min | 0.0% |
| ORD–EWR | Chicago to Newark | 467 | 69.8% | 16.8 min | 3.6% |
| ORD–SFO | Chicago to San Francisco | 434 | 82.9% | 0.4 min | 0.2% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left ORD on time in September 2023?
79.8% of 22,384 scheduled domestic departures left less than 15 minutes late, and 77.1% reached their destination on time. The national figures that month were 80.5% and 80.1%.
How does that compare with a year earlier?
September 2022 is outside the 36 months on file, or the airport had too few reported flights that month.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2023; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for ORD · methodology · corrections.