Flight number record
DL 3129
Delta Air Lines · Pensacola to Atlanta
- Route
- PNS → ATL
- Departs
- 07:00
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 3129, check with Delta Air Lines.
DL 3129 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 14 points better than the national rate of 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 364 flights, with a median arrival 12 minutes early.
Set against the rest of the country, DL 3129's record is 14 points better than the US average of 77.3%. That gap is worth roughly 141 fewer late arrivals for every thousand flights.
Key figures
On time
91.4%
Arrivals under 15 minutes late, of 359 completed flights
Avg delay
94 min
Across delayed arrivals only, not all flights
Cancelled
1.37%
National rate is 1.89%
1 hour+ late
4.2%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. The median arrival is 12 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 3129 flies
DL 3129 flies PNS to ATL without a single fixed slot. Its most common scheduled departure was 07:00, used on 210 of 364 flights, with 07:05 (77 flights) next.
- Departs 07:00210 flights57.7%
- Departs 07:0577 flights21.2%
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 07:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 3129 runs 2 points better at 91.4%. 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 3129 next to PNS to ATL
Every carrier on PNS to ATL combined arrived on time 88.8% of the time across 2,806 flights, so DL 3129 is 3 points ahead of it. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 10 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 3129thin sample | 364 | 91.4% | 94 min | 1.37% | A |
| All Delta Air Lines on PNS–ATL | 2,806 | 88.8% | 89 min | 1.82% | A |
| All carriers on PNS–ATL | 2,806 | 88.8% | 89 min | 1.82% | A |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 3129 quarter by quarter
DL 3129 did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Oct–Dec 2025 at 86.5%, a swing of 10 points on roughly 73 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 flights96.7%
- Oct–Dec 202591 flights86.5%
- Jan–Mar 202690 flights90.8%
- Apr–Jun 202691 flights95.6%
- Jul–Sep 202662 flights90.3%
Scale runs 80% to 100%.
By weekday, DL 3129 ranged from 86.0% on Sunday to 94.2% on Wednesday. With about 52 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 3129 runs when it is late
DL 3129 often beats the schedule: 146 of 359 completed flights, 41%, arrived 15 minutes or more early. The 31 late arrivals split 9 under half an hour, 7 between 30 and 60 minutes, and 15 an hour or more.
- 15+ min early146 flights40.7%
- Within 15 min182 flights50.7%
- 15–29 min late9 flights2.5%
- 30–59 min late7 flights1.9%
- 1–2 hours late9 flights2.5%
- 2+ hours late6 flights1.7%
Scale runs 0% to 100%.
Share of 359 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 24 departures that left 15 minutes late or more, only 1 made it up before arrival. 8 flights left on time and still arrived late.
The worst days
Worst days for DL 3129
The latest arrival of the period was on 8 January 2026, 7 hours 22 minutes behind schedule; most of its delay minutes were filed as extreme weather. Three of the five worst days fell in December 2025.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 8 January 2026 | 7 hours 22 minutes | Extreme weather |
| 2 August 2026 | 5 hours 28 minutes | Extreme weather |
| 25 December 2025 | 5 hours 15 minutes | Late-arriving aircraft |
| 7 December 2025 | 2 hours 52 minutes | Extreme weather |
| 6 December 2025 | 2 hours 4 minutes | Late-arriving aircraft |
Delay causes
Why DL 3129 runs late
Extreme weather accounts for 43% of the 2,905 delay minutes carriers reported here, and the remaining four split what is left.
- 43%Extreme weather
- 26%Carrier
- 19%Late-arriving aircraft
- 12%National Airspace System
Extreme weather accounts for 43% 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 7.1 times the usual weather exposure. The split is drawn from 2,905 delay minutes reported on DL 3129.
Cancellations sit at 1.37% 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 4.2% 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.
Every one of the 364 flights under DL 3129 in the data flew PNS 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. 364 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 3129
For a booking, DL 3129 has one of the better records a US domestic flight can show: 91.4% on time and 1.37% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- PNS to ATL, every carrier and departure
- ATL to PNS, the return direction
- Delta Air Lines 3019 on the same route93.5%
- Delta Air Lines 3103 on the same route92.6%
- Delta Air Lines 1640 on the same route87.1%
- Delta Air Lines 1013 on the same route82.9%
- Delta Air Lines 3067 on the same route90.6%
- 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.