PDX to IAH flight delays
Portland, OR (PDX) Houston, TX (IAH) · 1,825 miles
115 flights · March 2025 – August 2026 · US Bureau of Transportation Statistics
84.35%
Arrived on time
Within 15 minutes of schedule
0%
Cancelled
Share of scheduled flights
85 min
When late, late by
Average across delayed arrivals
14 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The shape of the lateness matters here. Flights on this route are not late often, but when they are late they are late by about 85 minutes — long enough to lose a connection or an evening. The on-time percentage looks reassuring and understates the consequence of being on the wrong flight.
The two directions do not behave alike. IAH to PDX arrives on time 10.7 points less often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
Flights from Portland to Houston keep to schedule more reliably than most. On a route this punctual the day you fly matters more than the airline you pick.
Every airline on PDX to IAH
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| United Airlines | 85 | 80% | 0% | 89 min | — |
| Alaska Airlines | 30 | 96.67% | 0% | 25 min | — |
The return leg
IAH to PDX Houston back to Portland 73.68% on time COther routes from Portland
Common questions
Are flights from Portland to Houston usually delayed?
84.35% of flights on the PDX to IAH route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is better than the average route in this record.
How often are PDX to IAH flights cancelled?
0% of scheduled flights did not operate — about 1 in every thousand. That is in the normal range.
When PDX to IAH flights are late, how late are they?
About 85 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on PDX to IAH during March 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →