Best Time to Fly IAH to PIT: On-Time Stats by Hour & Airline
George Bush Intercontinental/Houston → Pittsburgh International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 82.5% of Houston (IAH) to Pittsburgh (PIT) flights arrived on time (774 scheduled flights). That is 4.9 points above the national average of 77.6%.
United Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Wednesday was the most reliable day (85% on time) and June the worst month (71%).
The cancellation rate was 0.1% (US average 1.8%).
IAH to PIT on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| United Airlines | 82.5% | 58 min | 0.1% | 770 |
| SkyWest Airlines | Limited data | 4 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly IAH to PIT
On-time arrival % by scheduled departure hour (local time), 1,399 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 11 | |
| 7am–8am | 89.4% | 0.0% | 123 |
| 9am–10am | Limited data | 1 | |
| 11am–12pm | 88.9% | 0.4% | 253 |
| 12pm–1pm | 80.1% | 0.3% | 358 |
| 1pm–2pm | Limited data | 4 | |
| 4pm–5pm | Limited data | 3 | |
| 6pm–7pm | 75.8% | 0.9% | 455 |
| 7pm–8pm | 80.4% | 0.0% | 113 |
| 8pm–9pm | 73.1% | 0.0% | 78 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on IAH to PIT
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 28 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 76.4% | -6.6 pts | 1.8% | 56 |
| Summer peak (Jun 15 - Aug 15) | 71.8% | -11.2 pts | 1.1% | 265 |
| All other days | 83.0% | — | 0.3% | 1,050 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).