Route · SAT → IAH · 2020–2025 BTS data
San Antonio to Houston
The SAT–IAH corridor (San Antonio, TX → Houston, TX) runs ahead of the national average, served by 12 carriers across roughly 191 miles.
Data updated 2026-06-13
- 85.3%
- On-time
- +6.3 pts
- vs US avg
- 76 min
- Delay when late
- 12,995
- Flights
Cancelled
1.9%
Best Month
Mar 2024 91%
Worst Month
Jul 2024 69%
Distance
191 mi
Carriers
12
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 216 | 30 | 1 | 1 | UA,OO |
| Nov 2025 | 207 | 33 | 2 | 0 | OO,UA |
| Oct 2025 | 213 | 59 | 1 | 0 | UA |
| Sep 2025 | 229 | 39 | 0 | 0 | UA,OO |
| Aug 2025 | 208 | 43 | 3 | 0 | OO,UA |
| Jul 2025 | 185 | 44 | 3 | 0 | OO,UA |
| Jun 2025 | 212 | 48 | 7 | 2 | OO,UA |
| May 2025 | 198 | 46 | 4 | 0 | OO,UA |
| Apr 2025 | 142 | 19 | 0 | 0 | OO,UA |
| Mar 2025 | 231 | 31 | 1 | 0 | OO,UA |
| Feb 2025 | 187 | 28 | 1 | 0 | OO,UA |
| Jan 2025 | 177 | 23 | 8 | 0 | OO,UA |
| Dec 2024 | 182 | 27 | 2 | 0 | OO,UA |
| Nov 2024 | 222 | 24 | 1 | 0 | OO,UA |
| Oct 2024 | 233 | 43 | 0 | 0 | UA,OO |
| Sep 2024 | 231 | 21 | 0 | 0 | OO,UA |
| Aug 2024 | 218 | 33 | 4 | 1 | OO,UA |
| Jul 2024 | 200 | 62 | 16 | 0 | OO,UA |
| Jun 2024 | 139 | 21 | 3 | 0 | OO,UA |
| May 2024 | 145 | 31 | 8 | 0 | OO,UA |
| Apr 2024 | 151 | 20 | 0 | 0 | OO,UA |
| Mar 2024 | 113 | 10 | 2 | 0 | OO,UA |
| Feb 2024 | 131 | 13 | 0 | 0 | OO,UA |
| Jan 2024 | 156 | 20 | 18 | 0 | OO,UA |
Cancellation Rate
1.9%
85 of 4,526 flights
Diversion Rate
0.1%
4 of 4,526 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SAT - San Antonio
Full on-time, delay-cause, and seasonal performance for San Antonio, TX.
Origin airport →IAH - Houston
Full on-time, delay-cause, and seasonal performance for Houston, TX.
Destination airport →Compare the two airports
See SAT 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 SAT–IAH.
Routes with a similar on-time rate
What the Data Says About SAT to IAH
San Antonio to Houston (SAT to IAH) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 85.3% on-time rate across 12,995 flights, with delays that do happen averaging 76.2 minutes. The corridor runs roughly 191 miles and is served by 12 carriers. Over the most recent 24 months, 85 of 4,526 flights were cancelled (1.9%) and 4 diverted (0.1%).
The monthly split is wide on this route: Mar 2024 posted the strongest performance at 91% on-time, while Jul 2024 came in at just 69% - a 22-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from SAT to IAH? ▼
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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.