Best Time to Fly PIT to IAH: On-Time Stats by Hour & Airline
Pittsburgh International → George Bush Intercontinental/Houston
Data through July 2026 · Last updated October 18, 2026
774 flights were scheduled from Pittsburgh (PIT) to Houston (IAH) in the last 12 months, and 84.6% of those that flew arrived on time, 7.0 points above the US average of 77.6%.
United Airlines was the only reporting airline with regular flights on this route.
September has been the best month (92% on time) and Sunday the weakest day of the week (80%).
0.1% of flights were cancelled, versus 1.8% nationally.
PIT to IAH 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 | 84.5% | 63 min | 0.1% | 770 |
| SkyWest Airlines | Limited data | 4 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PIT to IAH
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 | 91.1% | 0.7% | 676 |
| 11am–12pm | Limited data | 11 | |
| 12pm–1pm | 98.3% | 0.0% | 59 |
| 1pm–2pm | 90.8% | 0.0% | 65 |
| 4pm–5pm | 75.5% | 0.5% | 382 |
| 5pm–6pm | 64.1% | 0.0% | 168 |
| 6pm–7pm | Limited data | 17 | |
| 9pm–10pm | Limited data | 21 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on PIT to IAH
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) | 85.5% | +2.1 pts | 1.8% | 56 |
| Summer peak (Jun 15 - Aug 15) | 80.5% | -2.9 pts | 1.1% | 265 |
| All other days | 83.4% | — | 0.4% | 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).