Flight profile · Delta Air Lines
DL1579
Atlanta (ATL) to Miami (MIA) · scheduled 12:52 PM – 2:50 PM
How DL1579 performs
716 operations, January 2024 – July 2026.
DL1579 arrived on time 74.1% of the time, against 71.5% for all ATL → MIA flights, so this departure is 2.6 percentage points better than the route as a whole. Against Delta Air Lines’ own flights on this route it is 3.1 points better.
Source: US DOT Bureau of Transportation Statistics · 716 operations, January 2024 – July 2026 · If DL1579 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where DL1579 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 |
|---|---|---|---|---|---|
| DL1579 | 74.1% | 0.84% | -1 min | 8.1% | 716 |
| Delta Air Lines on ATL → MIA | 71.0% | 1.17% | 0 min | 9.3% | 9,992 |
| All ATL → MIA flights | 71.5% | 1.29% | -1 min | 10.5% | 20,130 |
Source: FlyerIntel analysis of US DOT BTS data · January 2024 – July 2026
Why DL1579 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
the inbound aircraft was late, so this flight started late
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for DL1579 on ATL → MIA. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering January 2024 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies DL1579 comes in late, and what that does to the departure.
The aircraft flying DL1579 came in 15 or more minutes late on 12% 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.
Each departure is matched to the flight the same aircraft flew into ATL just before it, using the tail number in the DOT file, 669 of 710 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 |
|---|---|
| DL1579 | 12% |
| Network, same turn | 17% |
The schedule leaves a normal turn: enough time to clean and board if the aircraft is on time, little to spare if it is not.
The network row is every flight with a scheduled turn of 60 to 89 minutes. How often DL1579’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.
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 January 2024 – July 2026
From pushback to gate
When it leaves ATL late, does that still matter by the time it reaches MIA?
On arrival at MIA, DL1579 spends 11.7 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 55,233 departures from ATL scheduled in the clock hour DL1579 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 DL1579’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · January 2024 – July 2026
The hour it leaves ATL
Part of any flight’s record belongs to the clock rather than to the flight. DL1579 has one departure time, so this is what that time is worth.
On-time arrival rate. 55,233 departures from ATL are scheduled in the 12 PM–1 PM hour over the period, against 1,012,247 across the whole day.
DL1579 is scheduled out of ATL at 12:52 PM, in the 12 PM–1 PM bank. Departures from ATL in that hour arrive on time 82.9% of the time against 78.7% across the airport’s whole day — the slot alone is worth 4.2 points better before anything about this particular flight is considered.
The two airport figures cover every departure from ATL 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 · January 2024 – July 2026 · Hours below 120 departures are not scored.
Other routes DL1579 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| MIA→ATL Miami to Atlanta | January 8, 2024 – July 31, 2026 | 680 | 64.1% |
| MCO→DTW Orlando to Detroit | November 30, 2024 – December 1, 2024 | 2 | — |
| ATL→CLE Atlanta to Cleveland | October 1, 2024 – November 10, 2024 | 41 | — |
| CLE→ATL Cleveland to Atlanta | October 1, 2024 – November 10, 2024 | 41 | — |
| MSO→MSP Missoula to Minneapolis | June 7, 2024 – September 23, 2024 | 106 | 78.6% |
| MSP→MSO Minneapolis to Missoula | June 7, 2024 – September 23, 2024 | 106 | 90.3% |
| SLC→LAS Salt Lake City to Las Vegas | May 7, 2024 – June 6, 2024 | 31 | — |
| CHA→ATL Chattanooga to Atlanta | November 26, 2023 – January 7, 2024 | 24 | — |
| SLC→BOS Salt Lake City to Boston | December 15, 2023 | 1 | — |
| ATL→PIT Atlanta to Pittsburgh | November 5, 2023 – December 10, 2023 | 14 | — |
| PIT→ATL Pittsburgh to Atlanta | November 23, 2023 – December 10, 2023 | 3 | — |
| ATL→CHA Atlanta to Chattanooga | November 26, 2023 | 1 | — |
| CMH→DTW Columbus to Detroit | November 25, 2023 | 1 | — |
| DTW→CMH Detroit to Columbus | November 25, 2023 | 1 | — |
| ATL→MKE Atlanta to Milwaukee | October 9, 2023 – November 3, 2023 | 13 | — |
| ATL→LAX Atlanta to Los Angeles | October 29, 2023 | 1 | — |
| ATL→STL Atlanta to St. Louis | September 9, 2023 – October 7, 2023 | 6 | — |
| STL→ATL St. Louis to Atlanta | September 9, 2023 – October 7, 2023 | 6 | — |
| LAX→SEA Los Angeles to Seattle | July 5, 2023 – September 4, 2023 | 50 | — |
Because the same number has served different journeys, the statistics above describe only the route DL1579 currently operates. Blending them would produce an average of two different flights.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
52 min late
against a median of 1 min early
Percentiles over 716 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering January 2024 – July 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| DL2836 | Delta Air Lines | 83.8% | 2 min early | 897 |
| AA1046 | American Airlines | 81.7% | 10 min early | 863 |
| DL1510 | Delta Air Lines | 81.3% | 3 min early | 1,127 |
| DL1332 | Delta Air Lines | 78.9% | 4 min early | 1,016 |
| DL1579 this flight | Delta Air Lines | 74.1% | 1 min early | 716 |
| DL1589 | Delta Air Lines | 70.3% | 1 min early | 926 |
| DL1323 | Delta Air Lines | 67.6% | 3 min late | 1,054 |
| DL1588 | Delta Air Lines | 65.5% | 2 min late | 1,047 |
| DL1386 | Delta Air Lines | 60.8% | 6 min late | 892 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. DL1579 is placed in the same ordering rather than left out of it; the rows around it are the most punctual departures on the route, not all of them, so this is a comparison and not a rank. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 716 records of DL1579 operating ATL → 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