Flight number record
DL 912
Delta Air Lines · Salt Lake City to Atlanta
- Route
- SLC → ATL
- Departs
- 23:35
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 912, check with Delta Air Lines.
DL 912 earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 10 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 45 minutes. That rests on 365 flights, with a median arrival 10 minutes early.
Set against the rest of the country, DL 912's record is 10 points better than the US average of 77.3%. That gap is worth roughly 97 fewer late arrivals for every thousand flights.
Key figures
On time
87.0%
Arrivals under 15 minutes late, of 362 completed flights
Avg delay
46 min
Across delayed arrivals only, not all flights
Cancelled
0.55%
National rate is 1.89%
1 hour+ late
3.6%
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.
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Schedule
When DL 912 flies
DL 912 flies SLC to ATL without a single fixed slot. Its most common scheduled departure was 23:35, used on 227 of 365 flights, with 23:25 (76 flights) and 23:20 (57 flights) next.
- Departs 23:35227 flights62.2%
- Departs 23:2576 flights20.8%
- Departs 23:2057 flights15.6%
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 23:35 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 912 runs 17 points better at 87.0%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
DL 912 next to SLC to ATL
Every carrier on SLC to ATL combined arrived on time 86.4% of the time across 2,974 flights, so DL 912 is about level with it. Delta flew 2,968 flights on the same city pair under all its flight numbers, including this one, and those ran 86.5% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 912 | 365 | 87.0% | 46 min | 0.55% | A+ |
| All Delta Air Lines on SLC–ATL | 2,968 | 86.5% | 65 min | 0.57% | A+ |
| All carriers on SLC–ATL | 2,974 | 86.4% | 67 min | 0.57% | A+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 912 quarter by quarter
Quarter by quarter DL 912 held fairly steady: 83.3% in Jul–Sep 2025, 85.9% in Oct–Dec 2025, 90.9% in Jan–Mar 2026, 87.8% in Apr–Jun 2026 and 83.9% in Jul–Sep 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights83.3%
- Oct–Dec 202592 flights85.9%
- Jan–Mar 202690 flights90.9%
- Apr–Jun 202691 flights87.8%
- Jul–Sep 202662 flights83.9%
Scale runs 75% to 95%.
By weekday, DL 912 ranged from 80.4% on Sunday to 92.3% on Tuesday. With about 52 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 912 runs when it is late
DL 912 often beats the schedule: 121 of 362 completed flights, 33%, arrived 15 minutes or more early. Most of the lateness is short. 24 of the 47 late arrivals were under half an hour behind, and 13 reached an hour or more.
- 15+ min early121 flights33.4%
- Within 15 min194 flights53.6%
- 15–29 min late24 flights6.6%
- 30–59 min late10 flights2.8%
- 1–2 hours late12 flights3.3%
- 2+ hours late1 flights0.3%
Scale runs 0% to 100%.
Share of 362 completed flights by arrival against schedule.
A late pushback is often recovered here: of 75 departures that left 15 minutes late or more, 32 still arrived on time. Only 4 left on time and still arrived late.
The worst days
Worst days for DL 912
The latest arrival of the period was on 15 March 2026, 3 hours 10 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 15 March 2026 | 3 hours 10 minutes | Late-arriving aircraft |
| 6 July 2026 | 1 hour 55 minutes | Late-arriving aircraft |
| 29 May 2026 | 1 hour 45 minutes | Late-arriving aircraft |
| 18 May 2026 | 1 hour 40 minutes | Late-arriving aircraft |
| 13 July 2026 | 1 hour 31 minutes | Carrier |
Delay causes
Why DL 912 runs late
Late-arriving aircraft accounts for 46% of the 2,157 delay minutes carriers reported here, and the remaining four split what is left.
- 46%Late-arriving aircraft
- 44%Carrier
- 8%National Airspace System
- 2%Extreme weather
- 1%Security
46% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,157 reported delay minutes here, that single category outweighs weather by 25 to one. The split is drawn from 2,157 delay minutes reported on DL 912.
Cancellations are rare at 0.55%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 3.6% 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.
At 1,590 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
Every one of the 365 flights under DL 912 in the data flew SLC 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 912
For a booking, DL 912 has one of the better records a US domestic flight can show: 87.0% on time and 0.55% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- SLC to ATL, every carrier and departure
- ATL to SLC, the return direction
- Delta Air Lines 906 on the same route84.1%
- Delta Air Lines 907 on the same route94.8%
- Delta Air Lines 885 on the same route80.6%
- Delta Air Lines 897 on the same route92.0%
- Delta Air Lines 905 on the same route84.8%
- Delta Air Lines 835 on the same route83.6%
- Salt Lake City International (SLC) 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
- Why the first flight of the morning is statistically safest
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.