Route Reliability
Houston → San Antonio
IAH–SAT · 191 miles · George Bush Intercontinental Airport to San Antonio International Airport
- 83%
- Arrive within 15 minutes
- 4 min
- Average arrival delay
- 1.1%
- Cancelled
- 2,895
- Flights in the data
Data through May 2026.
United Airlines is the only airline in this data on this route, arriving on time 83% of the time across 2,895 flights. No comparison to make.
What the data says
Morning-you made the right choice.
IAH–SAT flights departing between 6–9 AM arrived on time 95% of the time, versus 75% between 6–9 PM.
Skip Monday if you can.
IAH–SAT flights arrived on time 89% of the time on Tuesdays. On Mondays: 78%.
Slipping a little lately.
IAH–SAT flights arrived on time 83% of the time over the last three months in the data, compared with 89% in the three months before that.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon78%(409 flights)
- Tue89%(416 flights)
- Wed84%(404 flights)
- Thu81%(401 flights)
- Fri81%(409 flights)
- Sat86%(407 flights)
- Sun82%(416 flights)
- 6–9 AM95%(347 flights)
- 9 AM–12 PM88%(470 flights)
- 12–3 PM82%(619 flights)
- 3–6 PM82%(352 flights)
- 6–9 PM75%(718 flights)
- 9 PM–12 AM84%(356 flights)
Jun 71% → May 83% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 71% | 228 |
| July 2025 | 74% | 243 |
| August 2025 | 79% | 247 |
| September 2025 | 88% | 239 |
| October 2025 | 85% | 248 |
| November 2025 | 85% | 231 |
| December 2025 | 86% | 244 |
| January 2026 | 89% | 236 |
| February 2026 | 92% | 218 |
| March 2026 | 83% | 242 |
| April 2026 | 83% | 240 |
| May 2026 | 83% | 246 |
Same trip, other airports
Keep nerding
Based on 2,895 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.