IAH to PHX flight delays & on-time performance
Nonstop flights from George Bush Intercontinental Airport to Phoenix Sky Harbor International Airport · 1,009 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at IAH or PHX right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Houston (IAH) to Phoenix (PHX) arrived on time 79% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.7% were cancelled, and 8% arrived an hour or more late.
- United Airlines was the most punctual airline here (81% on time); Frontier Airlines was the least (67%).
- Departures scheduled around 7am did best (95% on time); around 7pm did worst (64%).
- Tuesday was the most reliable day to fly (84% on time) and Sunday the least (74%).
- The largest source of delay minutes was late-arriving aircraft (39%).
Which airline is most on time from IAH to PHX?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Envoy AirRegional airline operating American Eagle flights. | 89% | 0.0% | 10 min | 8.1% | 37 |
| United Airlines | 81% | 0.3% | 12 min | 6.8% | 1,779 |
| American Airlines | 81% | 1.5% | 31 min | 8.5% | 672 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 69% | 2.8% | 24 min | 12.5% | 181 |
| Frontier Airlines | 67% | 0.7% | 26 min | 11.8% | 291 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am95%182 flights
- 8am82%353 flights
- 9am83%93 flights
- 10am85%305 flights
- 11am53%58 flights
- 12pm83%158 flights
- 1pm82%68 flights
- 2pm81%631 flights
- 4pm79%255 flights
- 5pm86%121 flights
- 6pm68%219 flights
- 7pm64%92 flights
- 8pm73%272 flights
- 9pm63%84 flights
- 10pm62%46 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday78%0.6% cancelled
- Tuesday84%1.1% cancelled
- Wednesday83%0.8% cancelled
- Thursday81%0.2% cancelled
- Friday76%1.1% cancelled
- Saturday78%0.5% cancelled
- Sunday74%0.9% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft39%
- Airline (crew, maintenance, cleaning, fueling)38%
- Air traffic control & airport congestion15%
- Extreme weather7%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather59%
- Air traffic control & airport congestion23%
- Airline (crew, maintenance, cleaning, fueling)18%
- Security0%
IAH to PHX: common questions
- How often are IAH to PHX flights on time?
- 79% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Houston to Phoenix cancelled?
- 0.7% of scheduled flights were cancelled (22 of 2,960).
- How long are typical delays?
- Across all flights the average arrival delay was 18 min (early arrivals count as zero). Flights that were late arrived 84 min behind schedule on average, and 8.0% of flights were an hour or more late.
- How long is taxi time at IAH?
- Flights on this route spent 21 min taxiing from the gate to takeoff on average.
Related routes
Return trip: PHX to IAH — 81% on time
More flights from Houston
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: IAH → PHX, nonstop flights by US airlines that report to the DOT. How we calculate this.