Carrier route record
OOSAT→IAH
SkyWest Airlines · San Antonio to Houston
- Flights
- 127
- Period
- September 2025 to August 2026
- Share of route
- 5%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with SkyWest Airlines.
SkyWest on SAT to IAH earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 10 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 127 flights, with a median arrival 9 minutes early.
Set against the rest of the country, SkyWest's SAT to IAH record is 10 points better than the US average of 77.3%. That gap is worth roughly 100 fewer late arrivals for every thousand flights.
Key figures
On time
87.3%
Arrivals under 15 minutes late, of 126 completed flights
Avg delay
69 min
Across delayed arrivals only, not all flights
Cancelled
0.79%
National rate is 1.89%
Whole route
83.0%
Every carrier on SAT to IAH, 2,372 flights
These figures cover 127 flights between September 2025 and August 2026. The median arrival is 9 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Carrier by carrier
SkyWest against every carrier on SAT to IAH
SkyWest flew 127 of the 2,372 flights on SAT to IAH, about 5% of it. Its 87.3% on time is 4 points better than the route as a whole, which runs 83.0%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from SkyWest at 87.3% to United at 82.8%.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SkyWest Airlines (this page)thin sample | 127 | 87.3% | 69 min | 0.79% | A+ |
| United Airlines | 2,245 | 82.8% | 59 min | 0.45% | B+ |
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When SkyWest runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 127 flights.
There are not enough flights in each departure window to split SkyWest's SAT to IAH record by time of day without the percentages moving on noise. The headline rate of 87.3% is the reliable figure here.
Across the year
SkyWest on SAT to IAH through the year
- Jul–Sep 20253 flights—
- Oct–Dec 202518 flights—
- Jan–Mar 202625 flights—
- Apr–Jun 202634 flights85.3%
- Jul–Sep 202647 flights93.6%
Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 87.3% on time across 127 flights.
Split by quarter, SkyWest on SAT to IAH logged 3 flights in Jul–Sep 2025, 18 flights in Oct–Dec 2025, 25 flights in Jan–Mar 2026, 34 flights in Apr–Jun 2026 and 47 flights in Jul–Sep 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 87.3% annual figure is the one to use.
Arrival by arrival
How late SkyWest on SAT to IAH runs when it is late
The 16 late arrivals split 7 under half an hour, 5 between 30 and 60 minutes, and 4 an hour or more.
- 15+ min early28 flights22.2%
- Within 15 min82 flights65.1%
- 15–29 min late7 flights5.6%
- 30–59 min late5 flights4.0%
- 1–2 hours late0 flights0.0%
- 2+ hours late4 flights3.2%
Scale runs 0% to 100%.
Share of 126 completed flights by arrival against schedule.
Only 11 of 126 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for SkyWest on SAT to IAH
The latest arrival of the period was on 11 March 2026, 4 hours 41 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The five worst days are spread across March, June, April and December, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 11 March 2026 | 4 hours 41 minutes | National Airspace System |
| 19 June 2026 | 2 hours 59 minutes | Late-arriving aircraft |
| 26 April 2026 | 2 hours 51 minutes | Carrier |
| 7 December 2025 | 2 hours 13 minutes | National Airspace System |
| 4 December 2025 | 43 minutes | Late-arriving aircraft |
Delay causes
Why SkyWest runs late on this route
National Airspace System accounts for 43% of the 1,107 delay minutes carriers reported here, and the remaining four split what is left.
- 43%National Airspace System
- 28%Carrier
- 25%Late-arriving aircraft
- 4%Extreme weather
43% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 481 minutes out of 1,107, against a national NAS share of 21%. The split is drawn from 1,107 reported delay minutes.
Cancellations are rare at 0.79%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here costs
Badly late arrivals are rare here: only 3.2% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
At 191 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 5pm–8pm window matters as much as it does.
The return leg is a different operation and performs like one: it runs 84.0% on time across 126 flights, 3 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 3 points of difference.
One caution: this is a thin sample. 127 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking SkyWest on SAT to IAH
Put together: treat all of this as provisional. 127 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 87.3% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 126 completed flights over 12 months sit behind that.
Related
Where to go next
- SAT to IAH, every carrier
- SkyWest on IAH to SAT, the return leg
- United Airlines on SAT to IAH82.8%
- SkyWest Airlines network-wide record
- San Antonio International (SAT) delay statistics
- George Bush Intercontinental (IAH) delay statistics
- How to read this site: grades, sample sizes, and honest caveats
- Late aircraft, weather, or the airline: what actually causes US flight delays
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.