Airports › Houston (IAH) › April 2025
Airport month · April 2025
George Bush Intercontinental/Houston in April 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 April 2025, reporting carriers scheduled 9,510 domestic departures from George Bush Intercontinental/Houston (IAH). 80.0% left less than 15 minutes late and 80.0% reached their destination on time; 0.5% were cancelled.
Nationally that month, 80.6% of flights departed on time and 79.5% arrived on time, so IAH departures were 0.6 points below the national departure figure.
A year earlier, in April 2024, the airport had 9,288 departures with 78.0% leaving on time: a change of +2.0 points, with flights up 2%.
Flights arriving at IAH that month were on time 81.7% of the time (9,505 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 34%, air carrier 33% and national aviation system 21%.
- On time 80.0%
- Arrived 15+ minutes late 19.3%
- Cancelled 0.5%
- Diverted 0.2%
April 2025 against a year earlier, the airport's year and the nation
| Measure | Apr 2025 | Apr 2024 | IAH, 12 months to Jul 2026 | All reported flights, Apr 2025 |
|---|---|---|---|---|
| Departed on time | 80.0% | 78.0% | 78.1% | 80.6% |
| Arrived on time | 80.0% | 77.1% | 77.6% | 79.5% |
| Cancelled | 0.5% | 0.5% | 1.1% | 0.8% |
| Average departure delay (late minutes only) | 16.7 min | 15.5 min | 17.2 min | 14.1 min |
| Scheduled departures a day | 317 | 310 | 326 | 19,465 |
| Scheduled departures | 9,510 | 9,288 | 119,020 | 583,950 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| UA United Airlines | 5,807 | 61% | 82.1% | 1.1 min | 0.1% |
| OO SkyWest Airlines | 1,293 | 14% | 76.9% | 13.9 min | 0.5% |
| DL Delta Air Lines | 671 | 7% | 82.4% | 7.6 min | 0.6% |
| AA American Airlines | 603 | 6% | 73.1% | 14.4 min | 2.7% |
| NK Spirit Airlines | 563 | 6% | 81.9% | 1.7 min | 0.2% |
| F9 Frontier Airlines | 295 | 3% | 64.7% | 32.9 min | 0.7% |
| MQ Envoy Air | 120 | 1% | 77.5% | 4.8 min | 3.3% |
| AS Alaska Airlines | 60 | 1% | 70.0% | 5.3 min | 3.3% |
| B6 JetBlue Airways | 60 | 1% | 63.3% | 7.8 min | 1.7% |
| OH PSA Airlines | 28 | 0% | 85.7% | 10.0 min | 0.0% |
| YX Republic Airline | 10 | 0% | 30.0% | 56.4 min | 20.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| IAH–DFW | Houston to Dallas/Fort Worth | 496 | 69.4% | 19.4 min | 3.4% |
| IAH–LAX | Houston to Los Angeles | 462 | 84.4% | 1.7 min | 0.0% |
| IAH–ORD | Houston to Chicago | 433 | 81.5% | 2.3 min | 0.7% |
| IAH–LGA | Houston to New York | 365 | 86.8% | -4.5 min | 0.3% |
| IAH–DEN | Houston to Denver | 355 | 76.9% | 7.0 min | 0.3% |
| IAH–ATL | Houston to Atlanta | 343 | 76.4% | 15.0 min | 1.2% |
| IAH–PHX | Houston to Phoenix | 338 | 84.0% | 1.3 min | 0.6% |
| IAH–LAS | Houston to Las Vegas | 318 | 84.6% | -3.4 min | 0.0% |
| IAH–MIA | Houston to Miami | 314 | 81.2% | 4.6 min | 1.0% |
| IAH–SFO | Houston to San Francisco | 292 | 86.3% | -7.9 min | 0.3% |
| IAH–EWR | Houston to Newark | 272 | 70.6% | 22.7 min | 0.4% |
| IAH–MCO | Houston to Orlando | 269 | 81.0% | 1.8 min | 0.7% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left IAH on time in April 2025?
80.0% of 9,510 scheduled domestic departures left less than 15 minutes late, and 80.0% reached their destination on time. The national figures that month were 80.6% and 79.5%.
How does that compare with a year earlier?
In April 2024, 78.0% of 9,288 departures left on time and 0.5% were cancelled, against 80.0% and 0.5% in April 2025.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for April 2025; 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.