Flight number record
AA 1604
American Airlines · San Antonio to Miami
- Route
- SAT → MIA
- Departs
- 05:00
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AA 1604, check with American Airlines.
AA 1604 earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 16 points better than the national rate of 77.3%. When something does go wrong the average delay runs close to two hours. That rests on 365 flights, with a median arrival 11 minutes early.
Set against the rest of the country, AA 1604's record is 16 points better than the US average of 77.3%. That gap is worth roughly 157 fewer late arrivals for every thousand flights.
Key figures
On time
93.0%
Arrivals under 15 minutes late, of 359 completed flights
Avg delay
106 min
Across delayed arrivals only, not all flights
Cancelled
0.82%
National rate is 1.89%
1 hour+ late
3.1%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 11 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When AA 1604 flies
AA 1604 flies SAT to MIA without a single fixed slot. Its most common scheduled departure was 05:00, used on 87 of 365 flights, with 05:01 (62 flights) and 05:25 (44 flights) next.
- Departs 05:0087 flights23.8%
- Departs 05:0162 flights17.0%
- Departs 05:2544 flights12.1%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 05:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and AA 1604 runs 4 points better at 93.0%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
AA 1604 next to SAT to MIA
Every carrier on SAT to MIA combined arrived on time 88.5% of the time across 495 flights, so AA 1604 is 5 points ahead of it. Across its whole network American Airlines managed 74.7%, which this flight beats by 18 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AA 1604 | 365 | 93.0% | 106 min | 0.82% | A+ |
| All American Airlines on SAT–MIA | 399 | 90.1% | 112 min | 0.75% | A+ |
| All carriers on SAT–MIA | 495 | 88.5% | 95 min | 0.61% | A+ |
| American Airlines, whole network | 988,892 | 74.7% | 85 min | 2.14% | C |
Across the year
AA 1604 quarter by quarter
Quarter by quarter AA 1604 held fairly steady: 95.6% in Oct–Dec 2025, 95.4% in Jan–Mar 2026, 89.0% in Apr–Jun 2026 and 90.3% in Jul–Sep 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights—
- Oct–Dec 202592 flights95.6%
- Jan–Mar 202690 flights95.4%
- Apr–Jun 202691 flights89.0%
- Jul–Sep 202662 flights90.3%
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, AA 1604 did best on Tuesday at 100.0% on time and worst on Saturday at 86.5%. Each day rests on about 52 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AA 1604 runs when it is late
AA 1604 often beats the schedule: 146 of 359 completed flights, 41%, arrived 15 minutes or more early. The 25 late arrivals split 10 under half an hour, 4 between 30 and 60 minutes, and 11 an hour or more.
- 15+ min early146 flights40.7%
- Within 15 min188 flights52.4%
- 15–29 min late10 flights2.8%
- 30–59 min late4 flights1.1%
- 1–2 hours late1 flights0.3%
- 2+ hours late10 flights2.8%
Scale runs 0% to 100%.
Share of 359 completed flights by arrival against schedule.
5 of 24 late departures made up the time and arrived on time, 21% of them. Only 6 left on time and still arrived late.
The worst days
Worst days for AA 1604
The latest arrival of the period was on 25 January 2026, 7 hours 28 minutes behind schedule; most of its delay minutes were filed as extreme weather. The five worst days are spread across January, June, March and May, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 25 January 2026 | 7 hours 28 minutes | Extreme weather |
| 3 June 2026 | 4 hours 30 minutes | Late-arriving aircraft |
| 22 March 2026 | 3 hours 38 minutes | Late-arriving aircraft |
| 11 May 2026 | 3 hours 38 minutes | Carrier |
| 26 January 2026 | 3 hours 32 minutes | Carrier |
Delay causes
Why AA 1604 runs late
Carrier accounts for 48% of the 2,642 delay minutes carriers reported here, and the remaining four split what is left.
- 48%Carrier
- 24%Late-arriving aircraft
- 20%Extreme weather
- 8%National Airspace System
Extreme weather accounts for 20% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 3.4 times the usual weather exposure. The split is drawn from 2,642 delay minutes reported on AA 1604.
Cancellations are rare at 0.82%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 3.1% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 1,143 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
Every one of the 365 flights under AA 1604 in the data flew SAT to MIA. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 365 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking AA 1604
For a booking, AA 1604 has one of the better records a US domestic flight can show: 93.0% on time and 0.82% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- San Antonio International (SAT) delay statistics
- Miami International (MIA) delay statistics
- American Airlines on-time record
- Every American Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
A flight number here means American Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.