Flight profile · American Airlines
AA1604
San Antonio (SAT) to Miami (MIA) · scheduled 5:20 AM – 9:20 AM
How AA1604 performs
1,127 operations, July 2023 – July 2026.
AA1604 arrived on time 91.0% of the time, against 84.6% for all SAT → MIA flights, so this departure is 6.4 percentage points better than the route as a whole. Against American Airlines’ own flights on this route it is 2.2 points better.
Source: US DOT Bureau of Transportation Statistics · 1,127 operations, July 2023 – July 2026 · If AA1604 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
What stands out
How AA1604 compares to other flight numbers, not just to itself.
This flight stays close to typical even on its worst days, a smaller gap than 91% of 11,788 comparable flight numbers.
A typical arrival is 10 min early, and the worst tenth are only 22 minutes worse than that.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · The one thing about this specific departure that ranks most extreme against every other published flight number, out of everything FlyerIntel checks — shown only when something clears a real statistical bar, not for every flight.
Where AA1604 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| AA1604 | 91.0% | 1.86% | -10 min | 3.4% | 1,127 |
| American Airlines on SAT → MIA | 88.8% | 1.93% | -9 min | 3.9% | 1,241 |
| All SAT → MIA flights | 84.6% | 1.62% | -8 min | 5.0% | 1,602 |
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
Why AA1604 runs late
Where US DOT attributed the delay minutes on this flight.
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
Share of the delay minutes US DOT attributed to each cause for AA1604 on SAT → MIA. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies AA1604 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, AA1604 pushed back an average of 7 minutes late; when it came in on time or early, an average of 0 minutes early.
Each departure is matched to the flight the same aircraft flew into SAT just before it, using the tail number in the DOT file, 1,081 of 1,106 departures in all. A departure is left out when that flight is unknown, was cancelled or diverted, or the aircraft had sat for more than 12 hours. A flight the airline cancelled never left and is not in the count, and one flown by a substitute aircraft is matched to the aircraft that flew it, not to the one first planned.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late | Left 15+ late after a late inbound | Left 15+ late after an on-time inbound |
|---|---|---|---|
| AA1604 | 34% | 9% | 5% |
| Network, same turn | 33% | 24% | 11% |
The schedule leaves a long gap on the ground, which gives a late aircraft room to catch up before this flight pushes back.
The network row is every flight with a scheduled turn of 3 to 6 hours. How often AA1604’s aircraft landed 15 or more minutes late is about the same as the network’s and, once the aircraft was late, how often AA1604 left 15 or more minutes late is lower than the network’s.
More: Which Flight Numbers Pay for a Late Aircraft lists the flight numbers that pass a late aircraft on.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
From pushback to gate
When it leaves SAT late, does that still matter by the time it reaches MIA?
AA1604 pushes back an average of 3.1 minutes late and reaches the gate at MIA an average of 1.1 minutes early. The 4.2 minutes between those two figures are slack the published schedule already carries, which is why a late pushback on this flight does not reliably become a late arrival. It spends 14.8 minutes on the taxiways at SAT, 2.3 minutes longer than a typical SAT departure in the same hour.
On arrival at MIA, AA1604 spends 11.6 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is 1.9 minutes longer than a typical MIA arrival (9.8 min).
Departure delay is averaged over every pushback and arrival delay over every completed arrival, so the two counts differ by the flights that never reached MIA. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 10,664 departures from SAT scheduled in the clock hour AA1604 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at MIA (340,467 flights), not just AA1604’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
The hour it leaves SAT
Part of any flight’s record belongs to the clock rather than to the flight. AA1604 has one departure time, so this is what that time is worth.
On-time arrival rate. 10,664 departures from SAT are scheduled in the 5 AM–6 AM hour over the period, against 127,237 across the whole day.
AA1604 is scheduled out of SAT at 5:20 AM, in the 5 AM–6 AM bank. Departures from SAT in that hour arrive on time 93.5% of the time against 82.3% across the airport’s whole day — the slot alone is worth 11.2 points better before anything about this particular flight is considered.
The two airport figures cover every departure from SAT to every destination, so they describe the slot rather than this journey — the like-for-like comparison against the route is above. Hours are scheduled local, and a number whose schedule moved between banks inside the period has no single hour and is not described here at all. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Hours below 120 departures are not scored.
By day of week
Does AA1604 run worse on particular days?
Tuesday is historically the most reliable day and Saturday the least, a gap of 9.9 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Days with fewer than 120 operations are not scored.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
12 min late
against a median of 10 min early
Percentiles over 1,127 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
Data and methodology
Calculated by FlyerIntel from 1,127 records of AA1604 operating SAT → MIA, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
Full methodology · Data sources · Report a problem
Related research: Most and Least Reliable Flight Numbers · The Delay You Inherit · Making Up Time in the Air
Analysis last recomputed