San Francisco (SFO) to San Antonio (SAT): On-Time Performance
Data through July 2026
When you fly SFO to SAT matters as much as anything else about the booking: the route swung from 96% on-time in April 2025 to just 63% in June 2026. Across the full period the route averages 81% on-time against a national 78%.
- On-time
- 81%
- arrived <15 min late
- Avg delay
- 13 min
- completed flights
- Cancelled
- 0.3%
- Flights/day
- 1.2
- last 12 months
- Duration
- 3h 37m
- scheduled
- Distance
- 1,482 mi
Best airline from SFO to SAT
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 82% | 13 min | 0.2% | 616 |
| United Airlines | 79% | 14 min | 0.6% | 359 |
Monthly on-time trend
Best time to fly from SFO to SAT
Aim for departures around 8 a.m. (91% on-time); avoid 11 a.m. departures (74%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 84% | 10 min |
| Tuesday | 81% | 12 min |
| Wednesday | 83% | 13 min |
| Thursday | 75% | 17 min |
| Friday | 77% | 12 min |
| Saturdaybest | 87% | 17 min |
| Sunday | 79% | 13 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft34%
- Airline operations43%
- National airspace system19%
- Weather4%
Frequently asked questions
- How often are flights from SFO to SAT delayed?
- 20% of SFO–SAT flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 13 minutes.
- Which airline is most reliable from SFO to SAT?
- SkyWest Airlines has the best on-time record on this route at 82%, based on 616 flights. 2 airlines flew SFO–SAT frequently enough to compare in this period.
- What is the best time of day to fly from SFO to SAT?
- Departures around 8 a.m. have the best record (91% on-time), while departures around 11 a.m. have the worst (74%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SFO to SAT?
- The scheduled SFO–SAT flight time averages 3h 37m over 1,482 miles. Actual arrival times vary — flights on this route land 15+ minutes late 20% of the time.
- How often are SFO to SAT flights cancelled?
- 0.3% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from SFO to SAT?
- June 2026 was the roughest month in this dataset, with only 63% of arrivals on time. The best was April 2025 at 96%. If your dates are flexible, that 32-point gap is worth planning around.
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Based on 975 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.