Miami (MIA) to San Antonio (SAT): On-Time Performance
Data through July 2026
The calendar drives reliability on MIA–SAT. November 2024 flights landed on schedule 86% of the time, but June 2025 dropped to 46% — a gap of 41 points. Across the full period the route averages 70% on-time against a national 78%.
- On-time
- 70%
- arrived <15 min late
- Avg delay
- 21 min
- completed flights
- Cancelled
- 1.5%
- Flights/day
- 1.3
- last 12 months
- Duration
- 3h 15m
- scheduled
- Distance
- 1,143 mi
Best airline from MIA to SAT
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Envoy Airmost reliable | 82% | 8 min | 0.8% | 241 |
| American Airlines | 66% | 24 min | 1.7% | 829 |
Monthly on-time trend
Best time to fly from MIA to SAT
Aim for departures around 3 p.m. (83% on-time); avoid 10 p.m. departures (43%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 68% | 23 min |
| Tuesdaybest | 82% | 15 min |
| Wednesday | 76% | 12 min |
| Thursday | 68% | 19 min |
| Friday | 71% | 23 min |
| Saturday | 62% | 27 min |
| Sunday | 61% | 25 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft42%
- Airline operations41%
- National airspace system11%
- Weather6%
- Security1%
Frequently asked questions
- How often are flights from MIA to SAT delayed?
- 31% of MIA–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 21 minutes.
- Which airline is most reliable from MIA to SAT?
- Envoy Air has the best on-time record on this route at 82%, based on 241 flights. 2 airlines flew MIA–SAT frequently enough to compare in this period.
- What is the best time of day to fly from MIA to SAT?
- Departures around 3 p.m. have the best record (83% on-time), while departures around 10 p.m. have the worst (43%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from MIA to SAT?
- The scheduled MIA–SAT flight time averages 3h 15m over 1,143 miles. Actual arrival times vary — flights on this route land 15+ minutes late 31% of the time.
- How often are MIA to SAT flights cancelled?
- 1.5% 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 MIA to SAT?
- June 2025 was the roughest month in this dataset, with only 46% of arrivals on time. The best was November 2024 at 86%. If your dates are flexible, that 41-point gap is worth planning around.
Explore related pages
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Related guides
Based on 1,078 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.