Flight number record
AA 1347
American Airlines · Houston to Miami
- Route
- IAH → MIA
- Departs
- 07:30
- Flights
- 361
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AA 1347, check with American Airlines.
AA 1347 earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 11 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 2.8 hours. That rests on 361 flights, with a median arrival 10 minutes early.
Set against the rest of the country, AA 1347's record is 11 points better than the US average of 77.3%. That gap is worth roughly 112 fewer late arrivals for every thousand flights.
Key figures
On time
88.5%
Arrivals under 15 minutes late, of 357 completed flights
Avg delay
169 min
Across delayed arrivals only, not all flights
Cancelled
0.55%
National rate is 1.89%
1 hour+ late
5.0%
National rate is 8.3%
These figures cover 361 flights between September 2025 and August 2026. The median arrival is 10 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 1347 flies
AA 1347 flies IAH to MIA without a single fixed slot. Its most common scheduled departure was 07:30, used on 84 of 361 flights, with 07:37 (64 flights) and 07:15 (46 flights) next.
- Departs 07:3084 flights23.3%
- Departs 07:3764 flights17.7%
- Departs 07:1546 flights12.7%
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 07:30 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and AA 1347 runs level with that at 88.5%. 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 1347 next to IAH to MIA
Every carrier on IAH to MIA combined arrived on time 78.6% of the time across 3,665 flights, so AA 1347 is 10 points ahead of it. American flew 1,565 flights on the same city pair under all its flight numbers, including this one, and those ran 78.8% on time. Across its whole network American Airlines managed 74.7%, which this flight beats by 14 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AA 1347thin sample | 361 | 88.5% | 169 min | 0.55% | A+ |
| All American Airlines on IAH–MIA | 1,565 | 78.8% | 114 min | 1.21% | B |
| All carriers on IAH–MIA | 3,665 | 78.6% | 93 min | 1.28% | B |
| American Airlines, whole network | 988,892 | 74.7% | 85 min | 2.14% | C |
Across the year
AA 1347 quarter by quarter
Quarter by quarter AA 1347 held fairly steady: 90.0% in Jul–Sep 2025, 92.0% in Oct–Dec 2025, 85.2% in Jan–Mar 2026, 86.8% in Apr–Jun 2026 and 90.0% 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 flights90.0%
- Oct–Dec 202589 flights92.0%
- Jan–Mar 202689 flights85.2%
- Apr–Jun 202691 flights86.8%
- Jul–Sep 202662 flights90.0%
Scale runs 75% to 95%.
By weekday, AA 1347 ranged from 82.4% on Sunday to 93.9% on Thursday. With about 52 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late AA 1347 runs when it is late
AA 1347 often beats the schedule: 148 of 357 completed flights, 41%, arrived 15 minutes or more early. The 41 late arrivals split 16 under half an hour, 7 between 30 and 60 minutes, and 18 an hour or more.
- 15+ min early148 flights41.5%
- Within 15 min168 flights47.1%
- 15–29 min late16 flights4.5%
- 30–59 min late7 flights2.0%
- 1–2 hours late6 flights1.7%
- 2+ hours late12 flights3.4%
Scale runs 0% to 100%.
Share of 357 completed flights by arrival against schedule.
A late pushback is often recovered here: of 47 departures that left 15 minutes late or more, 18 still arrived on time. 12 flights left on time and still arrived late.
The worst days
Worst days for AA 1347
The latest arrival of the period was on 1 April 2026, 29 hours 36 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 1 April 2026 | 29 hours 36 minutes | Late-arriving aircraft |
| 29 January 2026 | 13 hours 55 minutes | Late-arriving aircraft |
| 17 October 2025 | 13 hours 41 minutes | Late-arriving aircraft |
| 24 August 2026 | 12 hours 18 minutes | Late-arriving aircraft |
| 30 January 2026 | 4 hours 53 minutes | Carrier |
Delay causes
Why AA 1347 runs late
Late-arriving aircraft accounts for 49% of the 6,914 delay minutes carriers reported here, and the remaining four split what is left.
- 49%Late-arriving aircraft
- 38%Carrier
- 6%Extreme weather
- 6%National Airspace System
49% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 6,914 reported delay minutes here, that single category outweighs weather by 8 to one. The split is drawn from 6,914 delay minutes reported on AA 1347.
Cancellations are rare at 0.55%, 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
5.0% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about 2.8 hours, which a normal layover absorbs.
The 964 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.
The same number turns up on one other city pair in the data, including IAH to PHX (1), but none flew often enough under AA 1347 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAH to MIA only.
One caution: this is a thin sample. 361 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 1347
For a booking, AA 1347 has one of the better records a US domestic flight can show: 88.5% on time and 0.55% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- IAH to MIA, every carrier and departure
- MIA to IAH, the return direction
- United Airlines 410 on the same route81.1%
- George Bush Intercontinental (IAH) 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
- Why the first flight of the morning is statistically safest
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.