Airports › Houston (IAH) › December 2023
Airport month · December 2023
George Bush Intercontinental/Houston in December 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 December 2023, reporting carriers scheduled 9,076 domestic departures from George Bush Intercontinental/Houston (IAH). 84.7% left less than 15 minutes late and 84.8% reached their destination on time; 0.1% were cancelled.
Nationally that month, 83.1% of flights departed on time and 83.8% arrived on time, so IAH departures were 1.6 points above the national departure figure.
Flights arriving at IAH that month were on time 86.5% of the time (9,075 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 39%, air carrier 37% and national aviation system 22%.
- On time 84.8%
- Arrived 15+ minutes late 14.9%
- Cancelled 0.1%
- Diverted 0.2%
December 2023 against a year earlier, the airport's year and the nation
| Measure | Dec 2023 | Year earlier | IAH, 12 months to Jul 2026 | All reported flights, Dec 2023 |
|---|---|---|---|---|
| Departed on time | 84.7% | — | 78.1% | 83.1% |
| Arrived on time | 84.8% | — | 77.6% | 83.8% |
| Cancelled | 0.1% | — | 1.1% | 0.4% |
| Average departure delay (late minutes only) | 10.4 min | — | 17.2 min | 11.6 min |
| Scheduled departures a day | 303 | — | 326 | 19,013 |
| Scheduled departures | 9,076 | — | 119,020 | 570,394 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| UA United Airlines | 5,524 | 61% | 85.7% | -0.7 min | 0.0% |
| OO SkyWest Airlines | 918 | 10% | 83.3% | 2.6 min | 0.1% |
| NK Spirit Airlines | 649 | 7% | 76.9% | 6.8 min | 0.0% |
| DL Delta Air Lines | 616 | 7% | 90.1% | -7.6 min | 0.0% |
| WN Southwest Airlines | 519 | 6% | 87.9% | -3.7 min | 0.8% |
| AA American Airlines | 423 | 5% | 80.6% | 7.9 min | 0.0% |
| MQ Envoy Air | 164 | 2% | 86.0% | -7.6 min | 0.0% |
| F9 Frontier Airlines | 137 | 2% | 81.8% | 14.1 min | 0.0% |
| AS Alaska Airlines | 62 | 1% | 91.9% | -12.3 min | 0.0% |
| B6 JetBlue Airways | 62 | 1% | 61.3% | 53.0 min | 0.0% |
| YX Republic Airline | 2 | 0% | 100.0% | -26.5 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| IAH–LAX | Houston to Los Angeles | 426 | 89.2% | -4.4 min | 0.0% |
| IAH–DEN | Houston to Denver | 415 | 88.0% | -1.7 min | 0.2% |
| IAH–ORD | Houston to Chicago | 388 | 91.2% | -4.9 min | 0.0% |
| IAH–MCO | Houston to Orlando | 384 | 83.3% | 3.3 min | 0.0% |
| IAH–LAS | Houston to Las Vegas | 356 | 88.5% | -2.0 min | 0.0% |
| IAH–DFW | Houston to Dallas/Fort Worth | 348 | 77.9% | 2.2 min | 0.0% |
| IAH–EWR | Houston to Newark | 321 | 88.2% | -6.9 min | 0.0% |
| IAH–ATL | Houston to Atlanta | 307 | 85.0% | -0.1 min | 0.0% |
| IAH–SFO | Houston to San Francisco | 281 | 84.7% | -3.1 min | 0.0% |
| IAH–MIA | Houston to Miami | 268 | 75.4% | 14.1 min | 0.0% |
| IAH–LGA | Houston to New York | 235 | 80.9% | 2.7 min | 0.0% |
| IAH–FLL | Houston to Fort Lauderdale | 234 | 74.4% | 9.5 min | 0.0% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left IAH on time in December 2023?
84.7% of 9,076 scheduled domestic departures left less than 15 minutes late, and 84.8% reached their destination on time. The national figures that month were 83.1% and 83.8%.
How does that compare with a year earlier?
December 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 December 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.