Flight number record
DL 1258
Delta Air Lines · Austin to Atlanta
- Route
- AUS → ATL
- Departs
- 06:40
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1258, check with Delta Air Lines.
DL 1258 earns an A. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 16 points better than the national rate of 77.3%. When something does go wrong the average delay runs close to two hours. That rests on 365 flights, with a median arrival 15 minutes early.
Set against the rest of the country, DL 1258's record is 16 points better than the US average of 77.3%. That gap is worth roughly 160 fewer late arrivals for every thousand flights.
Key figures
On time
93.3%
Arrivals under 15 minutes late, of 358 completed flights
Avg delay
103 min
Across delayed arrivals only, not all flights
Cancelled
1.64%
National rate is 1.89%
1 hour+ late
2.8%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 15 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 DL 1258 flies
DL 1258 flies AUS to ATL without a single fixed slot. Its most common scheduled departure was 06:40, used on 148 of 365 flights, with 06:30 (120 flights) and 06:25 (73 flights) next.
- Departs 06:40148 flights40.5%
- Departs 06:30120 flights32.9%
- Departs 06:2573 flights20.0%
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 06:40 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 1258 runs 4 points better at 93.3%. 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
DL 1258 next to AUS to ATL
Every carrier on AUS to ATL combined arrived on time 81.9% of the time across 4,484 flights, so DL 1258 is 11 points ahead of it. Delta flew 3,162 flights on the same city pair under all its flight numbers, including this one, and those ran 86.1% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 12 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1258 | 365 | 93.3% | 103 min | 1.64% | A |
| All Delta Air Lines on AUS–ATL | 3,162 | 86.1% | 75 min | 1.49% | A |
| All carriers on AUS–ATL | 4,484 | 81.9% | 69 min | 1.27% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1258 quarter by quarter
Quarter by quarter DL 1258 held fairly steady: 93.3% in Jul–Sep 2025, 90.1% in Oct–Dec 2025, 91.9% in Jan–Mar 2026, 98.9% in Apr–Jun 2026 and 91.7% in Jul–Sep 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights93.3%
- Oct–Dec 202592 flights90.1%
- Jan–Mar 202690 flights91.9%
- Apr–Jun 202691 flights98.9%
- Jul–Sep 202662 flights91.7%
Scale runs 80% to 100%.
By weekday, DL 1258 ranged from 90.2% on Sunday to 96.1% on Thursday. With about 52 flights behind each day, a spread of 6 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 1258 runs when it is late
DL 1258 often beats the schedule: 189 of 358 completed flights, 53%, arrived 15 minutes or more early. The 24 late arrivals split 7 under half an hour, 7 between 30 and 60 minutes, and 10 an hour or more.
- 15+ min early189 flights52.8%
- Within 15 min145 flights40.5%
- 15–29 min late7 flights2.0%
- 30–59 min late7 flights2.0%
- 1–2 hours late4 flights1.1%
- 2+ hours late6 flights1.7%
Scale runs 0% to 100%.
Share of 358 completed flights by arrival against schedule.
Only 18 of 358 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for DL 1258
The latest arrival of the period was on 10 December 2025, 8 hours 3 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in December 2025.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 10 December 2025 | 8 hours 3 minutes | Carrier |
| 4 December 2025 | 4 hours 48 minutes | Carrier |
| 22 September 2025 | 4 hours 14 minutes | Carrier |
| 28 September 2025 | 3 hours 55 minutes | Carrier |
| 7 December 2025 | 3 hours 44 minutes | National Airspace System |
Delay causes
Why DL 1258 runs late
Carrier accounts for 74% of the 2,466 delay minutes carriers reported here, and the remaining four split what is left.
- 74%Carrier
- 26%National Airspace System
The largest share of delay minutes, 74%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,818 of the 2,466 delay minutes reported here. The split is drawn from 2,466 delay minutes reported on DL 1258.
Cancellations sit at 1.64% against a national 1.89%, which is ordinary. Diversions add another 0.27%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 2.8% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 813 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.
Every one of the 365 flights under DL 1258 in the data flew AUS to ATL. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 365 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 DL 1258
For a booking, read DL 1258 as 93.3% on time with 1.64% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- AUS to ATL, every carrier and departure
- ATL to AUS, the return direction
- Delta Air Lines 1344 on the same route96.3%
- Delta Air Lines 2899 on the same route88.1%
- Delta Air Lines 2976 on the same route92.3%
- Delta Air Lines 2104 on the same route79.1%
- Delta Air Lines 1397 on the same route79.8%
- Delta Air Lines 2886 on the same route83.6%
- Austin-Bergstrom International (AUS) delay statistics
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
A flight number here means Delta Air Lines’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.