Houston (IAH) to Pittsburgh (PIT): On-Time Performance
Data through May 2026
Houston (IAH) to Pittsburgh (PIT) effectively runs on two schedules. In February 2026, 95% of arrivals were on time; in July 2025 that fell to 56% — a 39-point seasonal swing. Across the full period the route averages 79% on-time against a national 78%. Morning departures also hold up better than evening ones (89% vs 74%), which matters most in the rough months.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 15 min
- completed flights
- Cancelled
- 1.3%
- Flights/day
- 1.9
- last 12 months
- Duration
- 2h 50m
- scheduled
- Distance
- 1,117 mi
Best airline from IAH to PIT
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Spirit Airlinesmost reliable | 86% | 8 min | 9.0% | 89 |
| United Airlines | 79% | 15 min | 0.8% | 1,293 |
Monthly on-time trend
Best time to fly from IAH to PIT
Aim for departures around 7 a.m. (93% on-time); avoid 6 p.m. departures (74%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 79% | 19 min |
| Tuesdaybest | 84% | 12 min |
| Wednesday | 81% | 17 min |
| Thursday | 79% | 14 min |
| Friday | 77% | 15 min |
| Saturday | 81% | 15 min |
| Sunday | 76% | 14 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft50%
- Airline operations34%
- National airspace system11%
- Weather5%
Frequently asked questions
- How often are flights from IAH to PIT delayed?
- 21% of IAH–PIT flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 15 minutes.
- Which airline is most reliable from IAH to PIT?
- Spirit Airlines has the best on-time record on this route at 86%, based on 89 flights. 2 airlines flew IAH–PIT frequently enough to compare in this period.
- What is the best time of day to fly from IAH to PIT?
- Departures around 7 a.m. have the best record (93% on-time), while departures around 6 p.m. have the worst (74%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from IAH to PIT?
- The scheduled IAH–PIT flight time averages 2h 50m over 1,117 miles. Actual arrival times vary — flights on this route land 15+ minutes late 21% of the time.
- How often are IAH to PIT flights cancelled?
- 1.3% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from IAH to PIT?
- July 2025 was the roughest month in this dataset, with only 56% of arrivals on time. The best was February 2026 at 95%. If your dates are flexible, that 39-point gap is worth planning around.
Explore related pages
More routes from IAH
Other ways to fly to Pittsburgh (PIT)
Related guides
Based on 1,392 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.