Route profile
MIA→SAT
Flight reliability, delays and best times to fly from Miami to San Antonio, 1,143 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 13% of comparable major US routes (4,598 compared)
Calculated from 1,602 flights. How this is calculated · What counts as on time
MIA → SAT arrives on time 68.2% of the time; the return trip, SAT → MIA, arrives on time 84.6% of the time, a 16.4-point gap between the two directions of the same city pair.
MIA → SAT spends 26.9 minutes on the ground on a 1,143-mile trip: 21.1 minutes from pushback to wheels-up at MIA and 5.7 minutes from touchdown to gate at SAT.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What stands out
Which day you fly matters unusually much here, a wider weekday spread than 96% of 4,467 comparable routes.
77.5% on time on a typical Tuesday, against 61.6% on a Sunday.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Ranked against every other route with the same kind of figure and at least 4,467 in the comparison.
What sets this route apart
Where MIA to SAT differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
Saturday is the day MIA to SAT slips furthest against routes of similar length, 61.8% on time where they average 77.1%, 15.3 points lower. Against all other routes the gap is 17.3 points.
In March, MIA to SAT runs 16.7 points below routes of similar length, 58.6% on time to 75.3%. Against all other routes the gap is 19.3 points.
American Airlines’ flights on MIA to SAT arrive on time 66.2% of the time, 8.1 points below the 74.3% it manages on its routes of similar length. Against all other routes the gap is 8.9 points.
MIA to SAT against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Weekday: Saturday | 61.8% | routes of similar length | 77.1% | −15.3 pts | 233 here, 328,580 there |
| Month: March | 58.6% | routes of similar length | 75.3% | −16.7 pts | 157 here, 219,990 there |
| Airline: American Airlines | 66.2% | routes of similar length | 74.3% | −8.1 pts | 1,210 here, 541,776 there |
Each comparison pools the flights of other routes, with this route’s own left out. Similar length means within 15% of this route’s 1,143 miles, with at least 5 such routes. A bucket is set against the most comparable group that has enough flights: similar length, then the same origin (at least 3 routes), then all other routes. Hours, weekdays and months appear only where both sides have 120 completed flights, and airlines where both have 600. The gap must be at least 2 points and 2 standard errors, and only the largest gap each way is kept per measure. These are differences in the flights counted, not causes.
When it goes wrong
July 2023 – July 2026
58 min late
against a median of 0 min early
Percentiles over 1,602 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at SAT after arriving from MIA.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 49% | Likely to miss |
| 45 min | 31% | Likely to miss |
| 60 min | 20% | High risk |
| 90 min | 9.2% | Some risk |
| 120 min | 4.7% | Low risk |
This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 1.62% of the time and diverts 0.44% of the time, which a late arrival never shows up in.
Chance of missing is the share of 1,569 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.
The worst tenth of arrivals on this route land at least 58 minutes late (90th-percentile gate arrival delay), over 1,602 operations.
Any other layover length: connection checker.
Best time to fly
MIA → SAT flights departing 3–6 PM arrived on time 76.2% of the time, against 57.9% for 6–9 PM departures, a gap of 18.3 percentage points.
By departure window
By departure hour
- 12 AM to 12 PM: too few flights to score
- 1 PM: 70.1% on time from 179 flights
- 2 PM: 76.7% on time from 152 flights
- 3 PM to 8 PM: too few flights to score
- 9 PM: 67.7% on time from 956 flights
- 10 PM to 11 PM: too few flights to score
Departure windows with fewer than 120 flights are not scored.
Why MIA → SAT runs late
July 2023 – July 2026
crew, maintenance, boarding and fueling, all within the carrier’s control
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for MIA → SAT. Only delays of 15 minutes or more are attributed. What the five causes mean
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| American Airlines | 1,240 | 66.2% | 1.94% | 0 min | 11.2% |
| Envoy Air | 354 | 74.9% | 0.56% | -3 min | 3.4% |
American Airlines flew 77.8% of the 1,594 flights listed. American Airlines cancelled 1.94% of its flights here against 0.56% for Envoy Air.
Envoy Air arrived on time 8.7 percentage points more often than American Airlines on this route.
Flights on this route
Flight numbers with at least 600 operations here and still on the schedule.
| Flight | Scheduled | Operations | On time |
|---|---|---|---|
| AA1468 American Airlines | 9:40 PM | 1,127 | 66.0% |
Weekly and seasonal patterns
By day of week
Tuesday is historically the most reliable day and Sunday the least, a gap of 15.9 percentage points.
By month
- Jan: no data
- Feb: 73.4%
- Mar: 58.6%
- Apr: 65.6%
- May: 64.3%
- Jun: 63.9%
- Jul: 60.2%
- Aug: 66.9%
- Sep: no data
- Oct: 82.8%
- Nov: 79.0%
- Dec: 67.4%
March is historically the weakest month and October the strongest, a spread of 24.2 percentage points.
Reliability over time
July 2023 – July 2026
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 69.3% against 70.4% in the 12 months before — broadly unchanged.
Data and methodology
Calculated by FlyerIntel from 1,602 MIA → SAT flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.
Full methodology · Data sources · Report a problem
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed