Route · IAH → ONT · 2020–2025 BTS data
Houston to Ontario
The IAH–ONT corridor (Houston, TX → Ontario, CA) runs behind the national average, served by 8 carriers across roughly 1,334 miles.
Data updated 2026-06-13
- 71.9%
- On-time
- -7.1 pts
- vs US avg
- 69 min
- Delay when late
- 1,475
- Flights
Cancelled
1.4%
Best Month
Apr 2025 70%
Worst Month
Mar 2025 63%
Distance
1,334 mi
Carriers
8
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 44 | 12 | 0 | 1 | F9,UA |
| Nov 2025 | 47 | 15 | 0 | 0 | UA,F9 |
| Oct 2025 | 48 | 15 | 0 | 0 | UA,F9 |
| Sep 2025 | 43 | 8 | 0 | 0 | UA,F9 |
| Aug 2025 | 40 | 15 | 1 | 0 | F9,UA |
| Jul 2025 | 39 | 17 | 0 | 0 | UA,F9 |
| Jun 2025 | 39 | 25 | 1 | 0 | UA,F9 |
| May 2025 | 45 | 18 | 0 | 0 | UA,F9 |
| Apr 2025 | 54 | 16 | 1 | 0 | F9,UA |
| Mar 2025 | 59 | 22 | 1 | 0 | UA,F9 |
| Feb 2025 | 39 | 7 | 1 | 0 | UA,F9 |
| Jan 2025 | 41 | 13 | 2 | 1 | UA,F9 |
| Dec 2024 | 42 | 16 | 1 | 0 | F9,UA |
| Nov 2024 | 47 | 11 | 0 | 0 | UA,F9 |
| Oct 2024 | 48 | 18 | 0 | 0 | UA,F9 |
| Sep 2024 | 47 | 16 | 0 | 0 | UA,F9 |
| Aug 2024 | 43 | 18 | 0 | 0 | F9,UA |
| Jul 2024 | 49 | 24 | 5 | 0 | F9,UA |
| Jun 2024 | 47 | 23 | 0 | 0 | F9,UA |
| Jul 2022 | 31 | 7 | 0 | 0 | UA |
| Jun 2022 | 30 | 13 | 1 | 0 | UA |
| May 2022 | 31 | 6 | 0 | 0 | UA |
| Apr 2022 | 30 | 8 | 0 | 0 | UA |
| Mar 2022 | 31 | 6 | 0 | 0 | UA |
Cancellation Rate
1.4%
14 of 1,014 flights
Diversion Rate
0.2%
2 of 1,014 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
IAH - Houston
Full on-time, delay-cause, and seasonal performance for Houston, TX.
Origin airport →ONT - Ontario
Full on-time, delay-cause, and seasonal performance for Ontario, CA.
Destination airport →Compare the two airports
See IAH and ONT side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to IAH–ONT.
Routes with a similar on-time rate
What the Data Says About IAH to ONT
On-time performance on the IAH to ONT pairing (Houston to Ontario) trails a chunk of the network: 71.9% of 1,475 tracked flights arrived on schedule, with a 68.9-minute average delay on the ones that ran late. The route spans about 1,334 miles across 8 carriers. Cancellations over the trailing 24 months hit 1.4% (14 of 1,014 flights), with 0.2% diverted.
Monthly performance varies moderately here: Apr 2025 was the strongest month at 70% on-time versus Mar 2025 at 63%, a 8-point difference.
Frequently Asked Questions
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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.
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.