Flight number record
DL 1073
Delta Air Lines · San Antonio to Atlanta
- Route
- SAT → ATL
- Departs
- 05:20
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1073, check with Delta Air Lines.
DL 1073 earns an A. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 17 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 10 minutes early.
Set against the rest of the country, DL 1073's record is 17 points better than the US average of 77.3%. That gap is worth roughly 165 fewer late arrivals for every thousand flights.
Key figures
On time
93.8%
Arrivals under 15 minutes late, of 357 completed flights
Avg delay
110 min
Across delayed arrivals only, not all flights
Cancelled
1.92%
National rate is 1.89%
1 hour+ late
3.1%
National rate is 8.3%
These figures cover 365 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 1073 flies
DL 1073 flies SAT to ATL without a single fixed slot. Its most common scheduled departure was 05:20, used on 118 of 365 flights, with 05:25 (72 flights) and 05:10 (70 flights) next.
- Departs 05:20118 flights32.3%
- Departs 05:2572 flights19.7%
- Departs 05:1070 flights19.2%
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 05:20 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 1073 runs 5 points better at 93.8%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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 1073 next to SAT to ATL
Every carrier on SAT to ATL combined arrived on time 85.9% of the time across 2,962 flights, so DL 1073 is 8 points ahead of it. Delta flew 2,596 flights on the same city pair under all its flight numbers, including this one, and those ran 87.4% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 13 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1073 | 365 | 93.8% | 110 min | 1.92% | A |
| All Delta Air Lines on SAT–ATL | 2,596 | 87.4% | 79 min | 1.93% | A |
| All carriers on SAT–ATL | 2,962 | 85.9% | 76 min | 1.72% | A |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1073 quarter by quarter
Quarter by quarter DL 1073 held fairly steady: 96.7% in Jul–Sep 2025, 94.5% in Oct–Dec 2025, 94.2% in Jan–Mar 2026, 94.4% in Apr–Jun 2026 and 90.2% in Jul–Sep 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights96.7%
- Oct–Dec 202592 flights94.5%
- Jan–Mar 202690 flights94.2%
- Apr–Jun 202691 flights94.4%
- Jul–Sep 202662 flights90.2%
Scale runs 80% to 100%.
By weekday, DL 1073 ranged from 88.5% on Tuesday to 98.0% on Friday. With about 52 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 1073 runs when it is late
DL 1073 often beats the schedule: 116 of 357 completed flights, 32%, arrived 15 minutes or more early. The 22 late arrivals split 8 under half an hour, 3 between 30 and 60 minutes, and 11 an hour or more.
- 15+ min early116 flights32.5%
- Within 15 min219 flights61.3%
- 15–29 min late8 flights2.2%
- 30–59 min late3 flights0.8%
- 1–2 hours late2 flights0.6%
- 2+ hours late9 flights2.5%
Scale runs 0% to 100%.
Share of 357 completed flights by arrival against schedule.
Only 19 of 357 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 1073
The latest arrival of the period was on 22 October 2025, 5 hours 28 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 22 October 2025 | 5 hours 28 minutes | Carrier |
| 4 July 2026 | 5 hours 7 minutes | Carrier |
| 27 May 2026 | 4 hours 32 minutes | Carrier |
| 27 January 2026 | 4 hours 11 minutes | Carrier |
| 7 July 2026 | 3 hours 18 minutes | Late-arriving aircraft |
Delay causes
Why DL 1073 runs late
Carrier accounts for 76% of the 2,411 delay minutes carriers reported here, and the remaining four split what is left.
- 76%Carrier
- 14%National Airspace System
- 8%Late-arriving aircraft
- 2%Extreme weather
The largest share of delay minutes, 76%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,824 of the 2,411 delay minutes reported here. The split is drawn from 2,411 delay minutes reported on DL 1073.
Cancellations sit at 1.92% 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 3.1% 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 874 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 1073 in the data flew SAT 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 1073
For a booking, read DL 1073 as 93.8% on time with 1.92% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SAT to ATL, every carrier and departure
- ATL to SAT, the return direction
- Delta Air Lines 1066 on the same route93.1%
- Delta Air Lines 1408 on the same route80.1%
- Delta Air Lines 998 on the same route92.2%
- Delta Air Lines 1676 on the same route86.7%
- San Antonio International (SAT) 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.