Pittsburgh (PIT) to Houston (IAH): On-Time Performance
Data through July 2026
When you fly PIT to IAH matters as much as anything else about the booking: the route swung from 98% on-time in October 2024 to just 60% in July 2024. Across the full period the route averages 82% on-time against a national 78%. Morning departures also hold up better than evening ones (89% vs 65%), which matters most in the rough months.
- On-time
- 82%
- arrived <15 min late
- Avg delay
- 13 min
- completed flights
- Cancelled
- 1.3%
- Flights/day
- 2.1
- last 12 months
- Duration
- 3h 13m
- scheduled
- Distance
- 1,117 mi
Best airline from PIT to IAH
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 83% | 13 min | 0.8% | 1,409 |
| Spirit Airlines | 60% | 30 min | 12.7% | 63 |
Monthly on-time trend
Best time to fly from PIT to IAH
Aim for departures around 12 p.m. (98% on-time); avoid 11 a.m. departures (53%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 82% | 14 min |
| Tuesday | 85% | 9 min |
| Wednesday | 80% | 16 min |
| Thursday | 81% | 11 min |
| Friday | 80% | 18 min |
| Saturdaybest | 86% | 8 min |
| Sunday | 80% | 15 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft28%
- Airline operations25%
- National airspace system42%
- Weather4%
Frequently asked questions
- How often are flights from PIT to IAH delayed?
- 18% of PIT–IAH flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 13 minutes.
- Which airline is most reliable from PIT to IAH?
- United Airlines has the best on-time record on this route at 83%, based on 1,409 flights. 2 airlines flew PIT–IAH frequently enough to compare in this period.
- What is the best time of day to fly from PIT to IAH?
- Departures around 12 p.m. have the best record (98% on-time), while departures around 11 a.m. have the worst (53%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from PIT to IAH?
- The scheduled PIT–IAH flight time averages 3h 13m over 1,117 miles. Actual arrival times vary — flights on this route land 15+ minutes late 18% of the time.
- How often are PIT to IAH flights cancelled?
- 1.3% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from PIT to IAH?
- July 2024 was the roughest month in this dataset, with only 60% of arrivals on time. The best was October 2024 at 98%. If your dates are flexible, that 39-point gap is worth planning around.
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Based on 1,482 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.