Route · ONT → IAH · 2020–2025 BTS data
Ontario to Houston
The ONT–IAH corridor (Ontario, CA → Houston, TX) runs ahead of the national average, served by 8 carriers across roughly 1,334 miles.
Data updated 2026-06-13
- 81.9%
- On-time
- +2.9 pts
- vs US avg
- 77 min
- Delay when late
- 1,472
- Flights
Cancelled
1.1%
Best Month
Apr 2025 85%
Worst Month
Mar 2025 76%
Distance
1,334 mi
Carriers
8
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 44 | 10 | 0 | 0 | F9,UA |
| Nov 2025 | 47 | 4 | 0 | 0 | UA,F9 |
| Oct 2025 | 48 | 5 | 0 | 0 | UA,F9 |
| Sep 2025 | 43 | 7 | 0 | 0 | UA,F9 |
| Aug 2025 | 40 | 11 | 0 | 0 | F9,UA |
| Jul 2025 | 38 | 7 | 0 | 0 | UA,F9 |
| Jun 2025 | 39 | 9 | 1 | 1 | UA,F9 |
| May 2025 | 44 | 4 | 1 | 0 | UA,F9 |
| Apr 2025 | 54 | 8 | 0 | 0 | F9,UA |
| Mar 2025 | 59 | 14 | 1 | 0 | UA,F9 |
| Feb 2025 | 39 | 6 | 0 | 0 | UA,F9 |
| Jan 2025 | 41 | 7 | 2 | 0 | UA,F9 |
| Dec 2024 | 42 | 10 | 1 | 0 | F9,UA |
| Nov 2024 | 47 | 6 | 0 | 0 | UA,F9 |
| Oct 2024 | 48 | 10 | 0 | 0 | UA,F9 |
| Sep 2024 | 47 | 11 | 1 | 0 | UA,F9 |
| Aug 2024 | 43 | 4 | 1 | 0 | F9,UA |
| Jul 2024 | 49 | 19 | 2 | 0 | F9,UA |
| Jun 2024 | 47 | 16 | 0 | 0 | F9,UA |
| Jul 2022 | 31 | 6 | 0 | 0 | UA |
| Jun 2022 | 30 | 8 | 1 | 0 | UA |
| May 2022 | 31 | 6 | 0 | 0 | UA |
| Apr 2022 | 30 | 3 | 0 | 0 | UA |
| Mar 2022 | 31 | 2 | 0 | 0 | UA |
Cancellation Rate
1.1%
11 of 1,012 flights
Diversion Rate
0.1%
1 of 1,012 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
ONT - Ontario
Full on-time, delay-cause, and seasonal performance for Ontario, CA.
Origin airport →IAH - Houston
Full on-time, delay-cause, and seasonal performance for Houston, TX.
Destination airport →Compare the two airports
See ONT and IAH side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to ONT–IAH.
Routes with a similar on-time rate
What the Data Says About ONT to IAH
1,472 tracked flights put the ONT to IAH pairing (Ontario to Houston) at a 81.9% on-time rate, squarely in line with the wider network. Delays that do occur run 76.7 minutes on average. Across the 1,334-mile route and its 8 carriers, the trailing 24 months show 1.1% cancelled and 0.1% diverted (1,012 flights sampled).
Monthly performance varies moderately here: Apr 2025 was the strongest month at 85% on-time versus Mar 2025 at 76%, a 9-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.