PWM to IAH flight delays & on-time performance
Nonstop flights from Portland International Jetport to George Bush Intercontinental Airport · 1,667 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at PWM or IAH right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Portland (PWM) to Houston (IAH) arrived on time 83% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0% were cancelled, and 8% arrived an hour or more late.
- The largest source of delay minutes was air traffic control & airport congestion (50%).
Which airline is most on time from PWM 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 |
|---|---|---|---|---|---|
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 86% | 0.0% | 8 min | 0.0% | 8 |
| United Airlines | 80% | 0.0% | 22 min | 20.0% | 5 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
Not enough departures across different hours to compare.
Best day of the week
On-time arrival rate by day of departure.
- Saturday83%0.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Air traffic control & airport congestion50%
- Late-arriving aircraft36%
- Airline (crew, maintenance, cleaning, fueling)14%
- Extreme weather0%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
No cancellation causes recorded in this period.
PWM to IAH: common questions
- How often are PWM to IAH flights on time?
- 83% 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 Portland to Houston cancelled?
- 0.0% of scheduled flights were cancelled (0 of 13).
- How long are typical delays?
- Across all flights the average arrival delay was 14 min (early arrivals count as zero). Flights that were late arrived 79 min behind schedule on average, and 8.3% of flights were an hour or more late.
- How long is taxi time at PWM?
- Flights on this route spent 17 min taxiing from the gate to takeoff on average.
Related routes
Return trip: IAH to PWM — 77% on time
More flights from Portland
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: PWM → IAH, nonstop flights by US airlines that report to the DOT. How we calculate this.