Flight number record
DL 3012
Delta Air Lines · Atlanta to Birmingham
- Route
- ATL → BHM
- Departs
- 12:15
- Flights
- 357
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 3012, check with Delta Air Lines.
DL 3012 earns an A+. More than four flights in five 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 a little over an hour. That rests on 357 flights, with a median arrival 10 minutes early.
Set against the rest of the country, DL 3012's record is 10 points better than the US average of 77.3%. That gap is worth roughly 95 fewer late arrivals for every thousand flights.
Key figures
On time
86.8%
Arrivals under 15 minutes late, of 356 completed flights
Avg delay
73 min
Across delayed arrivals only, not all flights
Cancelled
0.28%
National rate is 1.89%
1 hour+ late
4.8%
National rate is 8.3%
These figures cover 357 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 3012 flies
DL 3012 flies ATL to BHM without a single fixed slot. Its most common scheduled departure was 12:15, used on 64 of 357 flights, with 12:21 (38 flights) and 13:30 (37 flights) next.
- Departs 12:1564 flights17.9%
- Departs 12:2138 flights10.6%
- Departs 13:3037 flights10.4%
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 12:15 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and DL 3012 runs 9 points better at 86.8%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 3012 next to ATL to BHM
Every carrier on ATL to BHM combined arrived on time 83.1% of the time across 3,371 flights, so DL 3012 is 4 points ahead of it. 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 3012thin sample | 357 | 86.8% | 73 min | 0.28% | A+ |
| All Delta Air Lines on ATL–BHM | 3,371 | 83.1% | 64 min | 1.69% | B |
| All carriers on ATL–BHM | 3,371 | 83.1% | 64 min | 1.69% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 3012 quarter by quarter
DL 3012 did not run the same all year. Its best quarter was Oct–Dec 2025 at 92.1% on time and its weakest Jul–Sep 2026 at 80.6%, a swing of 12 points on roughly 89 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 202529 flights—
- Oct–Dec 202589 flights92.1%
- Jan–Mar 202686 flights83.5%
- Apr–Jun 202691 flights84.6%
- Jul–Sep 202662 flights80.6%
Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, DL 3012 ranged from 83.0% on Monday to 94.2% on Thursday. With about 51 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 3012 runs when it is late
DL 3012 often beats the schedule: 98 of 356 completed flights, 28%, arrived 15 minutes or more early. The 47 late arrivals split 16 under half an hour, 14 between 30 and 60 minutes, and 17 an hour or more.
- 15+ min early98 flights27.5%
- Within 15 min211 flights59.3%
- 15–29 min late16 flights4.5%
- 30–59 min late14 flights3.9%
- 1–2 hours late9 flights2.5%
- 2+ hours late8 flights2.2%
Scale runs 0% to 100%.
Share of 356 completed flights by arrival against schedule.
12 of 57 late departures made up the time and arrived on time, 21% of them. Only 2 left on time and still arrived late.
The worst days
Worst days for DL 3012
The latest arrival of the period was on 16 March 2026, 9 hours 17 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The five worst days are spread across March, June, July, December and April, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 16 March 2026 | 9 hours 17 minutes | Carrier |
| 20 June 2026 | 3 hours 55 minutes | Extreme weather |
| 3 July 2026 | 3 hours 14 minutes | National Airspace System |
| 7 December 2025 | 3 hours 2 minutes | Extreme weather |
| 28 April 2026 | 2 hours 31 minutes | Carrier |
Delay causes
Why DL 3012 runs late
Carrier accounts for 58% of the 3,407 delay minutes carriers reported here, and the remaining four split what is left.
- 58%Carrier
- 16%Late-arriving aircraft
- 13%National Airspace System
- 13%Extreme weather
Extreme weather accounts for 13% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.1 times the usual weather exposure. The split is drawn from 3,407 delay minutes reported on DL 3012.
Cancellations are rare at 0.28%, 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 4.8% 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.
DL 3012 is not only a ATL to BHM flight. It also flew BHM to ATL (356 flights, 86.5% 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. 357 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 |
|---|---|---|---|---|---|
| BHM to ATLthin sample | 356 | 86.5% | 92 min | 0.28% | A+ |
What to do with this
Booking DL 3012
For a booking, DL 3012 has one of the better records a US domestic flight can show: 86.8% on time and 0.28% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- ATL to BHM, every carrier and departure
- BHM to ATL, the return direction
- Delta Air Lines 2484 on the same route79.2%
- Delta Air Lines 3100 on the same route92.1%
- Delta Air Lines 2034 on the same route80.1%
- Delta Air Lines 3164 on the same route89.8%
- 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.