Best Time to Fly MIA to SAT: On-Time Stats by Hour & Airline
Miami International → San Antonio International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 69.4% of Miami (MIA) to San Antonio (SAT) flights arrived on time (483 scheduled flights). That is 8.2 points below the national average of 77.6%.
Envoy Air was the most punctual of the 2 airlines on the route at 85.7%, while American Airlines trailed at 65.9%.
October has been the best month (83% on time) and Sunday the weakest day of the week (62%).
0.8% of flights were cancelled, versus 1.8% nationally.
MIA 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 |
|---|---|---|---|---|
| Envoy Air | 85.7% | 28 min | 0.0% | 84 |
| American Airlines | 65.9% | 73 min | 1.0% | 399 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MIA to SAT
On-time arrival % by scheduled departure hour (local time), 1,047 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12pm–1pm | Limited data | 1 | |
| 1pm–2pm | 79.5% | 1.1% | 90 |
| 2pm–3pm | 78.7% | 1.4% | 143 |
| 3pm–4pm | 82.7% | 0.0% | 75 |
| 4pm–5pm | Limited data | 8 | |
| 7pm–8pm | 71.7% | 0.0% | 46 |
| 8pm–9pm | 52.3% | 0.0% | 44 |
| 9pm–10pm | 67.5% | 1.6% | 608 |
| 10pm–11pm | 43.3% | 6.2% | 32 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MIA 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 | 20 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 74.4% | +2.8 pts | 0.0% | 39 |
| Summer peak (Jun 15 - Aug 15) | 63.5% | -8.0 pts | 1.2% | 173 |
| All other days | 71.5% | — | 1.6% | 815 |
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).