Flight number record

AA 1347

American Airlines · Houston to Miami

Route: IAH → MIA
Departs: 07:30
Flights: 361
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s AA 1347, check with American Airlines.

AA 1347 earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 2.5 hours. That rests on 361 flights, with a median arrival 9 minutes early.

Set against the rest of the country, AA 1347's record is 8 points better than the US average of 77.6%. That gap is worth roughly 84 fewer late arrivals for every thousand flights.

On time

86.0%

Arrivals under 15 minutes late, of 356 completed flights

Avg delay

148 min

Across delayed arrivals only, not all flights

Cancelled

0.83%

National rate is 1.81%

1 hour+ late

6.7%

National rate is 8.1%

These figures cover 361 flights between July 2025 and June 2026. The median arrival is 9 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.

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 07:20 (69 flights) and 07:37 (63 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:3084 flights23.3%
Departs 07:2069 flights19.1%
Departs 07:3763 flights17.5%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

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 3 points worse at 86.0%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

AA 1347 next to IAH to MIA

Every carrier on IAH to MIA combined arrived on time 77.8% of the time across 3,736 flights, so AA 1347 is 8 points ahead of it. American flew 1,526 flights on the same city pair under all its flight numbers, including this one, and those ran 78.3% on time. Across its whole network American Airlines managed 74.4%, which this flight beats by 12 points.

AA 1347 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AA 1347thin sample	361	86.0%	148 min	0.83%	A+
All American Airlines on IAH–MIA	1,526	78.3%	111 min	1.31%	B
All carriers on IAH–MIA	3,736	77.8%	89 min	1.15%	B
American Airlines, whole network	986,297	74.4%	85 min	2.29%	C

Across the year

AA 1347 quarter by quarter

AA 1347 did not run the same all year. Its best quarter was Oct–Dec 2025 at 92.0% on time and its weakest Jul–Sep 2025 at 79.8%, a swing of 12 points on roughly 90 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Jul–Sep 202592 flights79.8%
Oct–Dec 202589 flights92.0%
Jan–Mar 202689 flights85.2%
Apr–Jun 202691 flights86.8%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, AA 1347 did best on Thursday at 94.0% on time and worst on Sunday at 75.5%. Each day rests on about 52 flights, so a gap of 19 points is worth noticing but could still narrow in another year.

Delay causes

Why AA 1347 runs late

One category carries most of the weight here. Carrier accounts for 47% of the 7,418 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
47%
Late-arriving aircraft
36%
National Airspace System
11%
Extreme weather
6%

36% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 7,418 reported delay minutes here, that single category outweighs weather by 6 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 7,418 delay minutes reported on AA 1347.

Cancellations are rare at 0.83%, below the national 1.81% 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

6.7% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about 2.5 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

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: 86.0% on time and 0.83% cancelled. That is a base rate, not a promise about any single day.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures