San Antonio International (SAT) Delays and On-Time Departures
San Antonio, TX · ranked 144th of 333 airports for on-time departures
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, San Antonio (SAT) had 40,226 scheduled departures and 81.3% of them left on time (US average 77.4%).
That ranks 144th of 333 US airports tracked on this site, with 1.2% of departures cancelled.
Among airlines at San Antonio (SAT), United Airlines left on time most often (87.8%).
Over 24 months, Tuesday was the most reliable day (86% on time) and June the worst month (74%).
Best time of day to fly out of San Antonio (SAT)
On-time departure % by scheduled departure hour (local time), last 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 94.3% | 1.3% | 6,842 |
| 6am–7am | 93.0% | 1.3% | 9,161 |
| 7am–8am | 91.9% | 1.0% | 7,806 |
| 8am–9am | 90.0% | 1.4% | 4,140 |
| 9am–10am | 89.5% | 1.5% | 3,260 |
| 10am–11am | 86.8% | 1.5% | 3,420 |
| 11am–12pm | 84.5% | 0.9% | 4,349 |
| 12pm–1pm | 81.2% | 1.4% | 6,072 |
| 1pm–2pm | 78.2% | 1.1% | 4,963 |
| 2pm–3pm | 77.3% | 0.7% | 5,810 |
| 3pm–4pm | 74.6% | 0.9% | 3,673 |
| 4pm–5pm | 73.7% | 0.8% | 6,168 |
| 5pm–6pm | 71.7% | 1.4% | 4,881 |
| 6pm–7pm | 71.4% | 1.2% | 5,325 |
| 7pm–8pm | 68.0% | 1.6% | 3,241 |
| 8pm–9pm | 61.0% | 1.4% | 2,199 |
| 9pm–10pm | 64.6% | 0.7% | 694 |
| 10pm–11pm | 72.7% | 0.5% | 195 |
| 11pm–12am | Limited data | 7 | |
Airlines at SAT ranked by on-time departures
Last 12 months. Airlines with fewer than 30 departures are marked “limited data”.
| Airline | On-time departures | On-time arrivals | Cancelled | Departures |
|---|---|---|---|---|
| United Airlines | 87.8% | 83.5% | 0.8% | 5,664 |
| SkyWest Airlines | 86.5% | 85.7% | 1.2% | 1,631 |
| Delta Air Lines | 85.7% | 86.0% | 1.5% | 6,848 |
| Republic Airways | 82.3% | 74.7% | 5.0% | 101 |
| American Airlines | 80.8% | 81.1% | 2.4% | 7,449 |
| Spirit Airlines | 78.2% | 79.2% | 3.6% | 824 |
| Frontier Airlines | 78.1% | 77.6% | 0.5% | 926 |
| Southwest Airlines | 77.4% | 80.4% | 0.5% | 15,197 |
| Alaska Airlines | 76.8% | 78.6% | 1.2% | 558 |
| Envoy Air | 76.8% | 75.6% | 2.6% | 1,023 |
| PSA Airlines | Limited data | 5 | ||
80%+ good 70–79.9% fair <70% poor
Best day to fly out of SAT
On-time departures by day, 24 months.
Best month to fly out of SAT
On-time departures by month, 24 months.
Holiday travel at San Antonio (SAT)
On-time departures during holiday periods compared with all other days, last 24 months.
| Period | On-time departures | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 82.0% | -1.3 pts | 0.2% | 1,612 |
| Christmas & New Year (Dec 20 - Jan 3) | 79.7% | -3.6 pts | 0.9% | 3,407 |
| Summer peak (Jun 15 - Aug 15) | 77.3% | -5.9 pts | 1.4% | 14,442 |
| All other days | 83.3% | — | 1.1% | 62,745 |
Monthly on-time departure trend at SAT
On-time departure % each month, with the 12-month US average for reference.
Routes from San Antonio (SAT)
Every route from SAT with its own page, by number of flights (last 12 months, on-time arrivals).