Flight profile · Delta Air Lines
DL1073
San Antonio (SAT) to Atlanta (ATL) · scheduled 5:25 AM – 8:47 AM
How DL1073 performs
784 operations, June 2024 – July 2026.
DL1073 arrived on time 92.4% of the time, against 84.8% for all SAT → ATL flights, so this departure is 7.6 percentage points better than the route as a whole. Against Delta Air Lines’ own flights on this route it is 6.6 points better.
Source: US DOT Bureau of Transportation Statistics · 784 operations, June 2024 – July 2026 · If DL1073 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 DL1073 compares to other flight numbers, not just to itself.
This flight stays close to typical even on its worst days, a smaller gap than 97% of 11,788 comparable flight numbers.
A typical arrival is 9 min early, and the worst tenth are only 17 minutes worse than that.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – July 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 DL1073 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 |
|---|---|---|---|---|---|
| DL1073 | 92.4% | 2.17% | -9 min | 3.0% | 784 |
| Delta Air Lines on SAT → ATL | 85.8% | 1.31% | -8 min | 4.7% | 7,464 |
| All SAT → ATL flights | 84.8% | 1.19% | -7 min | 5.0% | 9,436 |
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – July 2026
Why DL1073 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
weather severe enough to stop this flight specifically
airspace and airport capacity, including weather-driven flow control
the inbound aircraft was late, so this flight started late
Share of the delay minutes US DOT attributed to each cause for DL1073 on SAT → ATL. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering June 2024 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies DL1073 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, DL1073 pushed back an average of 7 minutes late; when it came in on time or early, an average of 1 minute early.
Each departure is matched to the flight the same aircraft flew into SAT just before it, using the tail number in the DOT file, 756 of 767 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 | Left 15+ late after a late inbound | Left 15+ late after an on-time inbound |
|---|---|---|---|
| DL1073 | 27% | 10% | 5% |
| Network, same turn | 33% | 24% | 11% |
The schedule leaves a long gap on the ground, which gives a late aircraft room to catch up before this flight pushes back.
The network row is every flight with a scheduled turn of 3 to 6 hours. How often DL1073’s aircraft landed 15 or more minutes late is lower than the network’s and, once the aircraft was late, how often DL1073 left 15 or more minutes late is lower than the network’s.
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 June 2024 – July 2026
From pushback to gate
When it leaves SAT late, does that still matter by the time it reaches ATL?
DL1073 pushes back an average of 1.5 minutes late and reaches the gate at ATL an average of 1.6 minutes early. The 3.0 minutes between those two figures are slack the published schedule already carries, which is why a late pushback on this flight does not reliably become a late arrival. Its 13.2 minutes on the taxiways at SAT is about what any departure from the airport in that hour spends.
On arrival at ATL, DL1073 spends 13.7 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 4.1 minutes longer than a typical ATL arrival (9.6 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 ATL. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 10,664 departures from SAT scheduled in the clock hour DL1073 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at ATL (1,012,161 flights), not just DL1073’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – July 2026
The hour it leaves SAT
Part of any flight’s record belongs to the clock rather than to the flight. DL1073 has one departure time, so this is what that time is worth.
On-time arrival rate. 10,664 departures from SAT are scheduled in the 5 AM–6 AM hour over the period, against 127,237 across the whole day.
DL1073 is scheduled out of SAT at 5:25 AM, in the 5 AM–6 AM bank. Departures from SAT in that hour arrive on time 93.5% of the time against 82.3% across the airport’s whole day — the slot alone is worth 11.2 points better before anything about this particular flight is considered.
The two airport figures cover every departure from SAT 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 · June 2024 – July 2026 · Hours below 120 departures are not scored.
Other routes DL1073 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 |
|---|---|---|---|
| BWI→ATL Baltimore to Atlanta | July 1, 2023 – June 6, 2024 | 158 | 89.0% |
| LAX→DTW Los Angeles to Detroit | April 9, 2024 – May 6, 2024 | 28 | — |
| JFK→SAT New York to San Antonio | March 10, 2024 – April 8, 2024 | 30 | — |
| SAT→JFK San Antonio to New York | March 10, 2024 – April 8, 2024 | 30 | — |
| RSW→DTW Fort Myers to Detroit | January 8, 2024 – March 9, 2024 | 61 | — |
| BOS→CHS Boston to Charleston | December 16–31, 2023 | 16 | — |
| CHS→BOS Charleston to Boston | December 16–31, 2023 | 16 | — |
| MSP→IAH Minneapolis to Houston | November 6, 2023 – December 15, 2023 | 26 | — |
Because the same number has served different journeys, the statistics above describe only the route DL1073 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.
8 min late
against a median of 9 min early
Percentiles over 784 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering June 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 |
|---|---|---|---|---|
| DL1073 this flight | Delta Air Lines | 92.4% | 9 min early | 784 |
| DL1066 | Delta Air Lines | 91.5% | 9 min early | 777 |
| DL1676 | Delta Air Lines | 88.5% | 9 min early | 889 |
| DL1465 | Delta Air Lines | 80.2% | 6 min early | 716 |
| DL1408 | Delta Air Lines | 78.9% | 5 min early | 912 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. DL1073 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 784 records of DL1073 operating SAT → 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 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
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