Airports › Houston (IAH) › September 2023
Airport month · September 2023
George Bush Intercontinental/Houston 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 9,283 domestic departures from George Bush Intercontinental/Houston (IAH). 79.6% left less than 15 minutes late and 78.9% 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 IAH departures were 0.9 points below the national departure figure.
Flights arriving at IAH that month were on time 81.7% of the time (9,277 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 38%, late-arriving aircraft 36% and national aviation system 20%.
- On time 78.9%
- Arrived 15+ minutes late 20.3%
- Cancelled 0.6%
- Diverted 0.2%
September 2023 against a year earlier, the airport's year and the nation
| Measure | Sep 2023 | Year earlier | IAH, 12 months to Jul 2026 | All reported flights, Sep 2023 |
|---|---|---|---|---|
| Departed on time | 79.6% | — | 78.1% | 80.5% |
| Arrived on time | 78.9% | — | 77.6% | 80.1% |
| Cancelled | 0.6% | — | 1.1% | 1.2% |
| Average departure delay (late minutes only) | 15.2 min | — | 17.2 min | 14.1 min |
| Scheduled departures a day | 309 | — | 326 | 18,978 |
| Scheduled departures | 9,283 | — | 119,020 | 569,338 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| UA United Airlines | 5,692 | 61% | 78.5% | 6.0 min | 0.6% |
| OO SkyWest Airlines | 908 | 10% | 80.8% | 7.8 min | 0.4% |
| DL Delta Air Lines | 651 | 7% | 82.8% | 5.2 min | 0.6% |
| NK Spirit Airlines | 603 | 6% | 75.3% | 7.8 min | 0.7% |
| AA American Airlines | 525 | 6% | 82.5% | 5.9 min | 0.0% |
| WN Southwest Airlines | 448 | 5% | 84.6% | 2.7 min | 0.4% |
| F9 Frontier Airlines | 131 | 1% | 75.6% | 23.6 min | 0.8% |
| MQ Envoy Air | 108 | 1% | 67.6% | 11.6 min | 0.0% |
| B6 JetBlue Airways | 86 | 1% | 53.5% | 76.2 min | 1.2% |
| AS Alaska Airlines | 85 | 1% | 80.0% | 2.4 min | 0.0% |
| YX Republic Airline | 46 | 0% | 63.0% | 10.5 min | 6.5% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| IAH–DEN | Houston to Denver | 443 | 83.5% | 6.7 min | 0.5% |
| IAH–LAX | Houston to Los Angeles | 434 | 87.1% | -1.0 min | 0.0% |
| IAH–DFW | Houston to Dallas/Fort Worth | 427 | 71.0% | 14.9 min | 0.0% |
| IAH–ATL | Houston to Atlanta | 406 | 82.5% | 3.5 min | 0.2% |
| IAH–ORD | Houston to Chicago | 380 | 81.8% | 3.8 min | 0.3% |
| IAH–LAS | Houston to Las Vegas | 334 | 79.0% | 4.2 min | 0.6% |
| IAH–LGA | Houston to New York | 334 | 76.3% | 9.2 min | 1.8% |
| IAH–EWR | Houston to Newark | 327 | 73.4% | 11.3 min | 4.6% |
| IAH–MCO | Houston to Orlando | 281 | 77.6% | 8.9 min | 0.0% |
| IAH–SFO | Houston to San Francisco | 266 | 80.8% | 4.6 min | 0.0% |
| IAH–BNA | Houston to Nashville | 219 | 85.4% | 3.9 min | 0.9% |
| IAH–MIA | Houston to Miami | 215 | 71.2% | 11.2 min | 0.5% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left IAH on time in September 2023?
79.6% of 9,283 scheduled domestic departures left less than 15 minutes late, and 78.9% 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 IAH · methodology · corrections.