Best Time to Fly SFO to SAT: On-Time Stats by Hour & Airline
San Francisco International → San Antonio International
Data through July 2026 · Last updated October 18, 2026
434 flights were scheduled from San Francisco (SFO) to San Antonio (SAT) in the last 12 months, and 77.4% of those that flew arrived on time, in line with the US average of 77.6%.
United Airlines was the most punctual of the 2 airlines on the route at 79.0%, while SkyWest Airlines trailed at 77.0%.
April has been the best month (86% on time) and Thursday the weakest day of the week (76%).
0.2% of flights were cancelled, versus 1.8% nationally.
SFO to SAT on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| United Airlines | 79.0% | 79 min | 0.0% | 82 |
| SkyWest Airlines | 77.0% | 74 min | 0.3% | 352 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SFO to SAT
On-time arrival % by scheduled departure hour (local time), 944 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 90.9% | 0.0% | 88 |
| 9am–10am | 86.0% | 1.1% | 88 |
| 10am–11am | 87.1% | 0.0% | 31 |
| 11am–12pm | 74.1% | 0.9% | 113 |
| 1pm–2pm | 83.0% | 0.0% | 47 |
| 3pm–4pm | Limited data | 4 | |
| 4pm–5pm | 77.7% | 0.0% | 266 |
| 5pm–6pm | Limited data | 1 | |
| 6pm–7pm | 81.6% | 0.0% | 268 |
| 11pm–12am | 78.4% | 0.0% | 38 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SFO to SAT
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 25 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 79.1% | -2.5 pts | 0.0% | 44 |
| Summer peak (Jun 15 - Aug 15) | 77.4% | -4.2 pts | 0.0% | 124 |
| All other days | 81.6% | — | 0.3% | 751 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).