PDX to IAH flight delays & on-time performance
Nonstop flights from Portland International Airport to George Bush Intercontinental Airport · 1,825 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at PDX 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 (PDX) to Houston (IAH) arrived on time 85% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.5% were cancelled, and 4% arrived an hour or more late.
- United Airlines was the most punctual airline here (86% on time); Alaska Airlines was the least (84%).
- Departures scheduled around 7am did best (93% on time); around 1pm did worst (78%).
- Sunday was the most reliable day to fly (89% on time) and Friday the least (79%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (36%).
Which airline is most on time from PDX 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% | 0.3% | 11 min | 5.3% | 874 |
| Alaska Airlines | 84% | 0.8% | 8 min | 2.3% | 353 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am93%478 flights
- 10am78%209 flights
- 11am83%29 flights
- 12pm84%151 flights
- 1pm78%169 flights
- 2pm84%43 flights
- 11pm82%146 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday86%0.0% cancelled
- Tuesday87%0.0% cancelled
- Wednesday83%1.1% cancelled
- Thursday85%0.0% cancelled
- Friday79%0.5% cancelled
- Saturday87%0.0% cancelled
- Sunday89%1.7% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)36%
- Late-arriving aircraft32%
- Air traffic control & airport congestion31%
- Security1%
- Extreme weather0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather67%
- Airline (crew, maintenance, cleaning, fueling)33%
- Air traffic control & airport congestion0%
- Security0%
PDX to IAH: common questions
- How often are PDX to IAH flights on time?
- 85% 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?
- 0.5% of scheduled flights were cancelled (6 of 1,227).
- How long are typical delays?
- Across all flights the average arrival delay was 10 min (early arrivals count as zero). Flights that were late arrived 64 min behind schedule on average, and 4.4% of flights were an hour or more late.
- How long is taxi time at PDX?
- Flights on this route spent 16 min taxiing from the gate to takeoff on average.
Related routes
Return trip: IAH to PDX — 81% 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: PDX → IAH, nonstop flights by US airlines that report to the DOT. How we calculate this.