Route profile
SAT→MIA
Flight reliability, delays and best times to fly from San Antonio to Miami, 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 68% of comparable major US routes (4,598 compared)
Calculated from 1,602 flights. How this is calculated
SAT → MIA arrives on time 84.6% of the time; the return trip, MIA → SAT, arrives on time 68.2% of the time, a 16.4-point gap between the two directions of the same city pair.
SAT → MIA spends 25.8 minutes on the ground on a 1,143-mile trip: 15.0 minutes from pushback to wheels-up at SAT and 10.8 minutes from touchdown to gate at MIA.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What stands out
The airline matters unusually much on this route, a wider carrier-to-carrier gap than 91% of 2,692 comparable routes.
American Airlines arrived on time 88.8% of the time, against 70.4% for Envoy Air, flying the exact same route.
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 2,692 in the comparison.
When it goes wrong
July 2023 – July 2026
27 min late
against a median of 8 min early
Percentiles over 1,602 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at MIA after arriving from SAT.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 29% | High risk |
| 45 min | 15% | Some risk |
| 60 min | 9.3% | Some risk |
| 90 min | 5.0% | Low risk |
| 120 min | 3.6% | 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 0.37% of the time, which a late arrival never shows up in.
Chance of missing is the share of 1,570 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 27 minutes late (90th-percentile gate arrival delay), over 1,602 operations.
Any other layover length: connection checker.
Why SAT → MIA runs late
July 2023 – July 2026
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for SAT → MIA. Only delays of 15 minutes or more are attributed.
Late-arriving aircraft is the largest cause on SAT → MIA, at 38.7%: flights here mostly leave late because the plane came in late.
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 | 1,241 | 88.8% | 1.93% | -9 min | 3.9% |
| Envoy Air | 353 | 70.4% | 0.57% | -4 min | 8.5% |
American Airlines flew 77.9% of the 1,594 flights listed. American Airlines cancelled 1.93% of its flights here against 0.57% for Envoy Air.
American Airlines arrived on time 18.4 percentage points more often than Envoy Air 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 |
|---|---|---|---|
| AA1604 American Airlines | 5:20 AM | 1,127 | 91.0% |
Weekly and seasonal patterns
By day of week
Tuesday is historically the most reliable day and Saturday the least, a gap of 12.6 percentage points.
By month
- Jan: no data
- Feb: 86.7%
- Mar: 75.6%
- Apr: 91.8%
- May: 80.0%
- Jun: 88.6%
- Jul: 77.4%
- Aug: 88.2%
- Sep: no data
- Oct: 86.5%
- Nov: 87.5%
- Dec: 80.0%
March is historically the weakest month and April the strongest, a spread of 16.2 percentage points.
Reliability over time
July 2023 – July 2026
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 88.7% against 82.6% in the 12 months before — improving by 6.1 percentage points.
Data and methodology
Calculated by FlyerIntel from 1,602 SAT → MIA 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