Flight number record
DL 1397
Delta Air Lines · Atlanta to Austin
- Route
- ATL → AUS
- Departs
- 14:15
- Flights
- 360
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1397, check with Delta Air Lines.
DL 1397 lands a B, 3 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by roughly 45 minutes on average. That rests on 360 flights, with a median arrival 10 minutes early.
Key figures
On time
80.0%
Arrivals under 15 minutes late, of 355 completed flights
Avg delay
44 min
Across delayed arrivals only, not all flights
Cancelled
1.39%
National rate is 1.89%
1 hour+ late
4.5%
National rate is 8.3%
These figures cover 360 flights between September 2025 and August 2026. The median arrival is 10 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.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Schedule
When DL 1397 flies
DL 1397 flies ATL to AUS without a single fixed slot. Its most common scheduled departure was 14:15, used on 56 of 360 flights, with 14:20 (55 flights) and 14:17 (37 flights) next.
- Departs 14:1556 flights15.6%
- Departs 14:2055 flights15.3%
- Departs 14:1737 flights10.3%
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 14:15 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and DL 1397 runs 8 points better at 80.0%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
DL 1397 next to ATL to AUS
Every carrier on ATL to AUS combined arrived on time 81.0% of the time across 4,497 flights, so DL 1397 is about level with it. Delta flew 3,163 flights on the same city pair under all its flight numbers, including this one, and those ran 81.9% on time. Across its whole network Delta Air Lines managed 81.1%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1397thin sample | 360 | 80.0% | 44 min | 1.39% | B |
| All Delta Air Lines on ATL–AUS | 3,163 | 81.9% | 58 min | 1.49% | B |
| All carriers on ATL–AUS | 4,497 | 81.0% | 59 min | 1.27% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1397 quarter by quarter
DL 1397 did not run the same all year. Its best quarter was Jan–Mar 2026 at 88.2% on time and its weakest Jul–Sep 2026 at 71.0%, a swing of 17 points on roughly 72 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 202530 flights80.0%
- Oct–Dec 202588 flights81.6%
- Jan–Mar 202689 flights88.2%
- Apr–Jun 202691 flights76.9%
- Jul–Sep 202662 flights71.0%
Scale runs 65% to 95%.
By weekday, DL 1397 did best on Wednesday at 88.0% on time and worst on Sunday at 73.5%. Each day rests on about 51 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1397 runs when it is late
DL 1397 often beats the schedule: 144 of 355 completed flights, 41%, arrived 15 minutes or more early. The 71 late arrivals split 28 under half an hour, 27 between 30 and 60 minutes, and 16 an hour or more.
- 15+ min early144 flights40.6%
- Within 15 min140 flights39.4%
- 15–29 min late28 flights7.9%
- 30–59 min late27 flights7.6%
- 1–2 hours late14 flights3.9%
- 2+ hours late2 flights0.6%
Scale runs 0% to 100%.
Share of 355 completed flights by arrival against schedule.
16 of 68 late departures made up the time and arrived on time, 24% of them. In the other direction, 19 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at AUS.
The worst days
Worst days for DL 1397
The latest arrival of the period was on 15 September 2025, 3 hours 22 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 15 September 2025 | 3 hours 22 minutes | Carrier |
| 7 December 2025 | 2 hours 24 minutes | Carrier |
| 13 July 2026 | 1 hour 53 minutes | National Airspace System |
| 18 September 2025 | 1 hour 44 minutes | Carrier |
| 3 July 2026 | 1 hour 39 minutes | National Airspace System |
Delay causes
Why DL 1397 runs late
Carrier accounts for 44% of the 3,091 delay minutes carriers reported here, and the remaining four split what is left.
- 44%Carrier
- 29%National Airspace System
- 22%Late-arriving aircraft
- 4%Extreme weather
The largest share of delay minutes, 44%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,372 of the 3,091 delay minutes reported here. The split is drawn from 3,091 delay minutes reported on DL 1397.
Cancellations sit at 1.39% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 4.5% 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.
DL 1397 is not only a ATL to AUS flight. It also flew AUS to ATL (346 flights, 79.8% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.
One caution: this is a thin sample. 360 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AUS to ATLthin sample | 346 | 79.8% | 59 min | 1.16% | B |
What to do with this
Booking DL 1397
For a booking, read DL 1397 as 80.0% on time with 1.39% cancelled over 360 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- ATL to AUS, every carrier and departure
- AUS to ATL, the return direction
- Delta Air Lines 2886 on the same route88.5%
- Delta Air Lines 2976 on the same route93.4%
- Delta Air Lines 1491 on the same route74.7%
- Delta Air Lines 2104 on the same route85.4%
- Delta Air Lines 1170 on the same route73.0%
- Delta Air Lines 2011 on the same route88.8%
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Austin-Bergstrom International (AUS) 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.