Route · PDX → IAH · 2020–2025 BTS data
Portland to Houston
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), PDX to IAH (Portland to Houston) ranks #2664 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 87.1%
- On-time
- +8.1 pts
- vs US avg
- 82 min
- Delay when late
- 4,534
- Flights
- #2664 of 4927
- Corpus placement
Cancelled
1.5%
Best Month
Sep 2024 95%
Worst Month
May 2024 76%
Distance
1,825 mi
Carriers
3
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 105 | 12 | 0 | 0 | AS,UA |
| Nov 2025 | 90 | 17 | 0 | 1 | UA,AS |
| Oct 2025 | 118 | 22 | 1 | 0 | AS,UA |
| Sep 2025 | 96 | 7 | 0 | 0 | UA,AS |
| Aug 2025 | 111 | 22 | 1 | 0 | UA,AS |
| Jul 2025 | 123 | 27 | 3 | 1 | AS,UA |
| Jun 2025 | 120 | 28 | 3 | 1 | AS,UA |
| May 2025 | 87 | 14 | 0 | 0 | AS,UA |
| Apr 2025 | 60 | 5 | 0 | 1 | UA |
| Mar 2025 | 62 | 3 | 0 | 0 | UA |
| Feb 2025 | 56 | 3 | 0 | 0 | UA |
| Jan 2025 | 66 | 5 | 3 | 0 | UA |
| Dec 2024 | 71 | 12 | 1 | 0 | UA |
| Nov 2024 | 60 | 3 | 0 | 0 | UA |
| Oct 2024 | 88 | 6 | 0 | 0 | UA |
| Sep 2024 | 86 | 4 | 1 | 0 | UA |
| Aug 2024 | 91 | 9 | 0 | 1 | UA |
| Jul 2024 | 93 | 19 | 6 | 1 | UA |
| Jun 2024 | 90 | 14 | 1 | 1 | UA |
| May 2024 | 71 | 17 | 1 | 2 | UA |
| Apr 2024 | 60 | 4 | 0 | 0 | UA |
| Mar 2024 | 62 | 10 | 0 | 0 | UA |
| Feb 2024 | 58 | 6 | 0 | 0 | UA |
| Jan 2024 | 61 | 13 | 9 | 0 | UA |
PDX–IAH seasonal on-time pattern
Best: April (93.3%) · weakest: July (78.2%)
Strongest calendar month
April
93.3% on-time · ~60 flights/mo
Busiest calendar month
July
~93 flights/mo avg
Weakest calendar month
July
78.2% on-time · ~93 flights/mo
Cancellation Rate
1.5%
30 of 1,985 flights
Diversion Rate
0.5%
9 of 1,985 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
PDX - Portland
Full on-time, delay-cause, and seasonal performance for Portland, OR.
PDX on-time profileIAH - Houston
Full on-time, delay-cause, and seasonal performance for Houston, TX.
IAH on-time profileCompare the two airports
See PDX and IAH side by side on delays, cancellations, and reliability.
Compare PDX vs IAHOrigin-hub reliability standing
Among PDX's stronger departures
PDX → IAH posts a 87.1% on-time rate, landing in the ≥85% band with 26 of 44 BTS-tracked routes leaving Portland. The same hub also shows 17 mid-band and 1 challenged departures · fleet-wide on-time rank #618 of 4927 (highest on-time = #1).
Similar routes
Other BTS-tracked routes with comparable performance or trip length to PDX–IAH.
Routes with a similar on-time rate
What the Data Says About PDX to IAH
Portland to Houston (PDX to IAH) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 87.1% on-time rate across 4,534 flights, with delays that do happen averaging 82.2 minutes. The corridor runs roughly 1,825 miles and is served by 3 carriers. Over the most recent 24 months, 30 of 1,985 flights were cancelled (1.5%) and 9 diverted (0.5%).
The monthly split is wide on this route: Sep 2024 posted the strongest performance at 95% on-time, while May 2024 came in at just 76% - a 19-point swing worth factoring into travel timing.
On the multi-year calendar, PDX–IAH peaks in April at 93.3% on-time while July carries the heaviest traffic (~93 flights per month) ; the softest month is July at 78.2%, a 15.1-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does PDX to IAH rank among US routes by traffic? ▼
How often are flights delayed from PDX to IAH? ▼
What is the cancellation rate for PDX to IAH? ▼
How far is the flight from PDX to IAH? ▼
When is the best time to fly from PDX to IAH? ▼
Airports on this route
Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Using PDX–IAH data
PDX–IAH runs 8.1 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare PDX and IAH airport profiles: delay causes and top routes differ even on the same corridor. PDX airport
- If your dates flex, April (93.3% on-time) beats July (78.2%) on this corridor. Seasonal chart
- 4 other routes post a similar 87.1% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.