PHX to IAH flight delays & on-time performance
Nonstop flights from Phoenix Sky Harbor International Airport to George Bush Intercontinental Airport · 1,009 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at PHX or IAH right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Phoenix (PHX) to Houston (IAH) arrived on time 81% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.8% were cancelled, and 7% arrived an hour or more late.
- United Airlines was the most punctual airline here (85% on time); SkyWest Airlines was the least (72%).
- Departures scheduled around 11am did best (94% on time); around 6pm did worst (69%).
- Wednesday was the most reliable day to fly (86% on time) and Friday the least (77%).
- The largest source of delay minutes was late-arriving aircraft (39%).
Which airline is most on time from PHX to IAH?
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 |
|---|---|---|---|---|---|
| United Airlines | 85% | 0.4% | 13 min | 5.0% | 1,775 |
| Envoy AirRegional airline operating American Eagle flights. | 82% | 0.0% | 7 min | 2.6% | 38 |
| Frontier Airlines | 79% | 0.7% | 14 min | 6.9% | 291 |
| American Airlines | 75% | 1.5% | 19 min | 9.1% | 672 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 72% | 2.8% | 24 min | 12.5% | 181 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am84%33 flights
- 6am92%243 flights
- 7am91%158 flights
- 8am79%382 flights
- 9am84%354 flights
- 10am85%202 flights
- 11am94%125 flights
- 12pm77%292 flights
- 1pm82%242 flights
- 2pm75%36 flights
- 3pm79%153 flights
- 4pm74%226 flights
- 5pm78%128 flights
- 6pm69%253 flights
- 7pm75%57 flights
- 8pm82%73 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday79%1.3% cancelled
- Tuesday83%0.0% cancelled
- Wednesday86%1.3% cancelled
- Thursday83%0.7% cancelled
- Friday77%0.9% cancelled
- Saturday83%0.5% cancelled
- Sunday78%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)35%
- Air traffic control & airport congestion24%
- Extreme weather2%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather54%
- Airline (crew, maintenance, cleaning, fueling)25%
- Air traffic control & airport congestion21%
- Security0%
PHX to IAH: common questions
- How often are PHX to IAH flights on time?
- 81% 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 Phoenix to Houston cancelled?
- 0.8% of scheduled flights were cancelled (24 of 2,957).
- How long are typical delays?
- Across all flights the average arrival delay was 15 min (early arrivals count as zero). Flights that were late arrived 73 min behind schedule on average, and 6.5% of flights were an hour or more late.
- How long is taxi time at PHX?
- Flights on this route spent 19 min taxiing from the gate to takeoff on average.
Related routes
Return trip: IAH to PHX — 79% on time
More flights from Phoenix
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: PHX → IAH, nonstop flights by US airlines that report to the DOT. How we calculate this.