Houston (IAH) to Phoenix (PHX): On-Time Performance
Data through July 2026
Houston (IAH) to Phoenix (PHX) effectively runs on two schedules. In February 2026, 91% of arrivals were on time; in July 2024 that fell to 57% — a 34-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 (85% vs 70%), which matters most in the rough months.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 18 min
- completed flights
- Cancelled
- 1.1%
- Flights/day
- 8.1
- last 12 months
- Duration
- 2h 59m
- scheduled
- Distance
- 1,009 mi
Best airline from IAH to PHX
5 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Envoy Airmost reliable | 85% | 13 min | 2.2% | 321 |
| American Airlines | 81% | 28 min | 1.5% | 978 |
| United Airlines | 81% | 13 min | 0.8% | 3,703 |
| SkyWest Airlines | 77% | 20 min | 1.9% | 516 |
| Frontier Airlines | 60% | 34 min | 1.5% | 620 |
Monthly on-time trend
Best time to fly from IAH to PHX
Aim for departures around 7 a.m. (95% on-time); avoid 10 p.m. departures (47%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 77% | 22 min |
| Tuesdaybest | 83% | 16 min |
| Wednesday | 82% | 14 min |
| Thursday | 80% | 14 min |
| Friday | 76% | 23 min |
| Saturday | 80% | 17 min |
| Sunday | 74% | 20 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft43%
- Airline operations35%
- National airspace system13%
- Weather9%
Frequently asked questions
- How often are flights from IAH to PHX delayed?
- 21% of IAH–PHX 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 18 minutes.
- Which airline is most reliable from IAH to PHX?
- Envoy Air has the best on-time record on this route at 85%, based on 321 flights. 5 airlines flew IAH–PHX frequently enough to compare in this period.
- What is the best time of day to fly from IAH to PHX?
- Departures around 7 a.m. have the best record (95% on-time), while departures around 10 p.m. have the worst (47%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from IAH to PHX?
- The scheduled IAH–PHX flight time averages 2h 59m over 1,009 miles. Actual arrival times vary — flights on this route land 15+ minutes late 21% of the time.
- How often are IAH to PHX flights cancelled?
- 1.1% 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 IAH to PHX?
- July 2024 was the roughest month in this dataset, with only 57% of arrivals on time. The best was February 2026 at 91%. If your dates are flexible, that 34-point gap is worth planning around.
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Based on 6,138 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.