Flight profile · American Airlines
AA1045
Miami (MIA) to Atlanta (ATL) · scheduled 8:10 PM – 10:13 PM
How AA1045 performs
612 operations, November 2023 – August 2026.
Between its first and last recorded date on MIA → ATL, AA1045 averaged about 4 operations a week (612 in 1,031 days, cancelled ones included).
AA1045 arrived on time 57.0% of the time, against 71.9% for all MIA → ATL flights, so this departure is 14.9 percentage points worse than the route as a whole. Against American Airlines’ own flights on this route it is 8.9 points worse.
Source: US DOT Bureau of Transportation Statistics · 612 operations, November 2023 – August 2026 · If AA1045 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 AA1045 compares to other flight numbers, not just to itself.
This flight runs unusually far behind the MIA → ATL route as a whole, worse than 92% of 12,358 comparable flight numbers.
57.0% on time for this specific departure, against 71.9% for every MIA → ATL flight.
Source: FlyerIntel analysis of US DOT BTS data · November 2023 – August 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 AA1045 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 |
|---|---|---|---|---|---|
| AA1045 | 57.0% | 1.14% | 10 min | 15.9% | 612 |
| American Airlines on MIA → ATL | 65.9% | 1.32% | 0 min | 14.2% | 5,370 |
| All MIA → ATL flights | 71.9% | 1.31% | -3 min | 11.1% | 20,630 |
AA1045 cancelled 7 of 612 operations (1.14%), close to the 1.31% for MIA → ATL.
15.9% of AA1045’s arrivals were an hour or more late, against 11.1% across MIA → ATL, so the long delays are more common on this number than on the route.
Source: FlyerIntel analysis of US DOT BTS data · November 2023 – August 2026
Why AA1045 runs late
Where US DOT attributed the delay minutes on this flight.
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
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for AA1045 on MIA → ATL. Only delays of 15 minutes or more are attributed. What the five causes mean
Source: US DOT Bureau of Transportation Statistics · Data covering November 2023 – August 2026
Does a late aircraft delay this flight?
How often the plane that flies AA1045 comes in late, and what that does to the departure.
AA1045 is usually the aircraft’s first flight of the day: the schedule gives it a median of 8 hours on the ground at MIA, so its “inbound” is mostly the aircraft’s arrival the evening before.
The aircraft flying AA1045 came in 15 or more minutes late on 19% of the departures where its previous flight is known. There are not enough departures in both groups to say how the flight left after a late one and after an on-time one.
Matched by tail number to the aircraft’s previous flight into MIA: 393 of 606 departures. Unknown, cancelled or diverted inbounds and gaps over 12 hours are left out.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late |
|---|---|
| AA1045 | 19% |
| Network, same turn | 29% |
A night on the ground absorbs most of a late arrival, so a late inbound matters far less here than on a same-day turn.
The network row is every flight with a scheduled turn of 6 hours or more, usually overnight. How often AA1045’s aircraft landed 15 or more minutes late is lower than the network’s. There are not enough departures in both groups to compare how it left.
Source: US DOT Bureau of Transportation Statistics · Data covering November 2023 – August 2026
From pushback to gate
When it leaves MIA late, does that still matter by the time it reaches ATL?
On arrival at ATL, AA1045 spends 10.5 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 about what any arrival at ATL spends on the ground before reaching the gate.
Taxi-out is gate to wheels up and sits inside the scheduled block; the hourly comparison is 20,962 MIA departures. Taxi-in is landing to gate, set against 1,039,387 arrivals at ATL. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · November 2023 – August 2026
The hour it leaves MIA
AA1045 has one departure time, 8:10 PM, so this is what that hour at MIA is worth.
On-time arrival rate. 20,962 departures from MIA are scheduled in the 8 PM–9 PM hour over the period, against 349,146 across the whole day.
AA1045 is scheduled out of MIA at 8:10 PM, in the 8 PM–9 PM bank. Departures from MIA in that hour arrive on time 65.0% of the time against 73.2% across the airport’s whole day — the slot alone is worth 8.2 points worse before anything about this particular flight is considered.
Both airport figures cover every destination from MIA, so they describe the slot, not this journey; the route comparison is above. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · November 2023 – August 2026 · Hours below 120 departures are not scored.
Other routes AA1045 has flown
Carriers reassign flight numbers. AA1045 also served these 9 other city pairs in the period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| ATL→MIA Atlanta to Miami | April 7, 2026 – May 20, 2026 | 44 | — |
| ORD→AUS Chicago to Austin | February 18, 2026 – March 4, 2026 | 4 | — |
| CLT→DAB Charlotte to Daytona Beach | February 16, 2026 | 1 | — |
| DAB→CLT Daytona Beach to Charlotte | February 16, 2026 | 1 | — |
| RDM→PHX Redmond to Phoenix | February 12, 2026 | 1 | — |
| AVP→CLT Wilkes-Barre/Scranton to Charlotte | July 1, 2023 – February 11, 2026 | 420 | 88.6% |
| MIA→PHL Miami to Philadelphia | December 18, 2025 – January 5, 2026 | 19 | — |
| CMH→ORD Columbus to Chicago | November 2, 2025 | 1 | — |
| CLT→GSO Charlotte to Greensboro | January 7, 2025 – February 12, 2025 | 37 | — |
The figures above describe only MIA → ATL, the route AA1045 flies now.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
95 min late
against a median of 10 min late
AA1045 has an average that understates its risk: a typical arrival is 10 min late, but the worst tenth are 86 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.
Percentiles over 612 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering November 2023 – August 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| DL1249 | Delta Air Lines | 92.5% | 12 min early | 724 |
| DL1211 | Delta Air Lines | 91.2% | 7 min early | 792 |
| DL1261 | Delta Air Lines | 88.5% | 9 min early | 816 |
| AA1046 | American Airlines | 83.8% | 8 min early | 652 |
| DL2836 | Delta Air Lines | 79.4% | 5 min early | 970 |
| F92483 | Frontier Airlines | 76.5% | 5 min early | 839 |
| DL1510 | Delta Air Lines | 74.5% | 4 min early | 1,158 |
| DL1332 | Delta Air Lines | 68.5% | 1 min early | 1,047 |
| AA1045 this flight | American Airlines | 57.0% | 10 min late | 612 |
Among the 9 departures listed, AA1045 has the lowest on-time rate, 35.5 points behind the best. Every departure here has at least 600 operations; the other rows are the most punctual on the route, not all of them.
Data and methodology
Calculated by FlyerIntel from 612 records of AA1045 operating MIA → ATL, 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 reported separately, not in the on-time rate.
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