PHL to IAH flight delays & on-time performance
Nonstop flights from Philadelphia International Airport to George Bush Intercontinental Airport · 1,325 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at PHL or IAH right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Philadelphia (PHL) to Houston (IAH) arrived on time 81% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 1.9% were cancelled, and 8% arrived an hour or more late.
- United Airlines was the most punctual airline here (86% on time); American Airlines was the least (76%).
- Departures scheduled around 6am did best (95% on time); around 7pm did worst (71%).
- Tuesday was the most reliable day to fly (85% on time) and Sunday the least (77%).
- The largest source of delay minutes was late-arriving aircraft (38%).
Which airline is most on time from PHL 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 | 86% | 1.1% | 12 min | 5.2% | 923 |
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 80% | 0.0% | 18 min | 10.0% | 20 |
| PSA AirlinesRegional airline operating American Eagle flights. | 77% | 2.2% | 18 min | 11.4% | 92 |
| American Airlines | 76% | 3.0% | 20 min | 9.9% | 728 |
| Frontier Airlines | 68% | 1.4% | 21 min | 12.7% | 72 |
| Spirit Airlines | 67% | 0.0% | 15 min | 0.0% | 12 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am96%24 flights
- 6am95%92 flights
- 7am67%39 flights
- 8am85%429 flights
- 9am87%89 flights
- 10am93%76 flights
- 11am41%23 flights
- 12pm85%224 flights
- 1pm82%200 flights
- 3pm53%19 flights
- 5pm79%166 flights
- 6pm78%207 flights
- 7pm71%182 flights
- 8pm60%21 flights
- 9pm67%52 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday80%3.0% cancelled
- Tuesday85%1.6% cancelled
- Wednesday84%0.8% cancelled
- Thursday80%1.1% cancelled
- Friday81%0.7% cancelled
- Saturday81%2.0% cancelled
- Sunday77%4.2% 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 aircraft38%
- Airline (crew, maintenance, cleaning, fueling)31%
- Air traffic control & airport congestion27%
- Extreme weather5%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather80%
- Airline (crew, maintenance, cleaning, fueling)14%
- Air traffic control & airport congestion6%
- Security0%
PHL to IAH: common questions
- How often are PHL 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 Philadelphia to Houston cancelled?
- 1.9% of scheduled flights were cancelled (35 of 1,847).
- How long are typical delays?
- Across all flights the average arrival delay was 16 min (early arrivals count as zero). Flights that were late arrived 81 min behind schedule on average, and 7.6% of flights were an hour or more late.
- How long is taxi time at PHL?
- Flights on this route spent 20 min taxiing from the gate to takeoff on average.
Related routes
Return trip: IAH to PHL — 79% on time
More flights from Philadelphia
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: PHL → IAH, nonstop flights by US airlines that report to the DOT. How we calculate this.