Phoenix (PHX) to Houston (IAH): On-Time Performance
Data through May 2026
Phoenix (PHX) to Houston (IAH) effectively runs on two schedules. In February 2026, 90% of arrivals were on time; in July 2024 that fell to 62% — a 28-point seasonal swing. Across the full period the route averages 82% on-time against a national 78%. Morning departures also hold up better than evening ones (88% vs 74%), which matters most in the rough months.
- On-time
- 82%
- arrived <15 min late
- Avg delay
- 14 min
- completed flights
- Cancelled
- 1.2%
- Flights/day
- 8.0
- last 12 months
- Duration
- 2h 40m
- scheduled
- Distance
- 1,009 mi
Best airline from PHX to IAH
5 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 85% | 13 min | 1.0% | 3,557 |
| Envoy Air | 83% | 8 min | 1.6% | 322 |
| American Airlines | 81% | 14 min | 1.4% | 852 |
| SkyWest Airlines | 75% | 21 min | 1.8% | 543 |
| Frontier Airlines | 71% | 20 min | 1.2% | 587 |
Monthly on-time trend
Best time to fly from PHX to IAH
Aim for departures around 11 a.m. (94% on-time); avoid 6 p.m. departures (71%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 80% | 18 min |
| Tuesdaybest | 86% | 11 min |
| Wednesday | 84% | 12 min |
| Thursday | 83% | 15 min |
| Friday | 80% | 15 min |
| Saturday | 84% | 14 min |
| Sunday | 79% | 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 aircraft39%
- Airline operations33%
- National airspace system26%
- Weather2%
Frequently asked questions
- How often are flights from PHX to IAH delayed?
- 18% of PHX–IAH 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 14 minutes.
- Which airline is most reliable from PHX to IAH?
- United Airlines has the best on-time record on this route at 85%, based on 3,557 flights. 5 airlines flew PHX–IAH frequently enough to compare in this period.
- What is the best time of day to fly from PHX to IAH?
- Departures around 11 a.m. have the best record (94% on-time), while departures around 6 p.m. have the worst (71%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from PHX to IAH?
- The scheduled PHX–IAH flight time averages 2h 40m over 1,009 miles. Actual arrival times vary — flights on this route land 15+ minutes late 18% of the time.
- How often are PHX to IAH flights cancelled?
- 1.2% 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 PHX to IAH?
- July 2024 was the roughest month in this dataset, with only 62% of arrivals on time. The best was February 2026 at 90%. If your dates are flexible, that 28-point gap is worth planning around.
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Based on 5,861 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.