Route · SAT → IAH · 2020–2025 BTS data
San Antonio to Houston
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SAT to IAH (San Antonio to Houston) ranks #807 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 85.3%
- On-time
- +6.3 pts
- vs US avg
- 76 min
- Delay when late
- 12,995
- Flights
- #807 of 4927
- Corpus placement
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 |
SAT–IAH seasonal on-time pattern
Best: November (88.7%) · weakest: July (78.9%)
Strongest calendar month
November
88.7% on-time · ~187 flights/mo
Busiest calendar month
October
~200 flights/mo avg
Weakest calendar month
July
78.9% on-time · ~182 flights/mo
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.
SAT on-time profileIAH - Houston
Full on-time, delay-cause, and seasonal performance for Houston, TX.
IAH on-time profileCompare the two airports
See SAT and IAH side by side on delays, cancellations, and reliability.
Compare SAT vs IAHOrigin-hub reliability standing
Among SAT's stronger departures
SAT → IAH posts a 85.3% on-time rate, landing in the ≥85% band with 17 of 31 BTS-tracked routes leaving San Antonio. The same hub also shows 12 mid-band and 2 challenged departures · fleet-wide on-time rank #1132 of 4927 (highest on-time = #1).
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.
On the multi-year calendar, SAT–IAH peaks in November at 88.7% on-time while October carries the heaviest traffic (~200 flights per month) ; the softest month is July at 78.9%, a 9.8-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does SAT to IAH rank among US routes by traffic? ▼
How often are flights delayed from SAT to IAH? ▼
What is the cancellation rate for SAT to IAH? ▼
How far is the flight from SAT to IAH? ▼
When is the best time to fly from SAT 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 SAT–IAH data
SAT–IAH runs 6.3 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare SAT and IAH airport profiles: delay causes and top routes differ even on the same corridor. SAT airport
- If your dates flex, November (88.7% on-time) beats July (78.9%) on this corridor. Seasonal chart
- 4 other routes post a similar 85.3% 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.