Flight number record
DL 3128
Delta Air Lines · New Orleans to Atlanta
- Route
- MSY → ATL
- Departs
- 09:05
- Flights
- 330
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 3128, check with Delta Air Lines.
DL 3128 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 16 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 330 flights, with a median arrival 10 minutes early.
Set against the rest of the country, DL 3128's record is 16 points better than the US average of 77.3%. That gap is worth roughly 155 fewer late arrivals for every thousand flights.
Key figures
On time
92.8%
Arrivals under 15 minutes late, of 318 completed flights
Avg delay
82 min
Across delayed arrivals only, not all flights
Cancelled
3.64%
National rate is 1.89%
1 hour+ late
2.2%
National rate is 8.3%
These figures cover 330 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 3128 flies
DL 3128 flies MSY to ATL without a single fixed slot. Its most common scheduled departure was 09:05, used on 88 of 330 flights, with 10:38 (44 flights) and 09:13 (39 flights) next.
- Departs 09:0588 flights26.7%
- Departs 10:3844 flights13.3%
- Departs 09:1339 flights11.8%
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 09:05 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 3128 runs 9 points better at 92.8%. 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 3128 next to MSY to ATL
Every carrier on MSY to ATL combined arrived on time 82.2% of the time across 4,004 flights, so DL 3128 is 11 points ahead of it. Delta flew 3,278 flights on the same city pair under all its flight numbers, including this one, and those ran 86.7% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 12 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 3128thin sample | 330 | 92.8% | 82 min | 3.64% | A− |
| All Delta Air Lines on MSY–ATL | 3,278 | 86.7% | 71 min | 1.49% | A |
| All carriers on MSY–ATL | 4,004 | 82.2% | 68 min | 1.47% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 3128 quarter by quarter
Quarter by quarter DL 3128 held fairly steady: 90.1% in Oct–Dec 2025, 92.7% in Jan–Mar 2026, 93.2% in Apr–Jun 2026 and 94.1% in Jul–Sep 2026. A spread of 4 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202526 flights—
- Oct–Dec 202578 flights90.1%
- Jan–Mar 202686 flights92.7%
- Apr–Jun 202688 flights93.2%
- Jul–Sep 202652 flights94.1%
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, DL 3128 ranged from 89.1% on Sunday to 96.0% on Friday. With about 47 flights behind each day, a spread of 7 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 3128 runs when it is late
DL 3128 often beats the schedule: 84 of 318 completed flights, 26%, arrived 15 minutes or more early. The 23 late arrivals split 9 under half an hour, 7 between 30 and 60 minutes, and 7 an hour or more.
- 15+ min early84 flights26.4%
- Within 15 min211 flights66.4%
- 15–29 min late9 flights2.8%
- 30–59 min late7 flights2.2%
- 1–2 hours late3 flights0.9%
- 2+ hours late4 flights1.3%
Scale runs 0% to 100%.
Share of 318 completed flights by arrival against schedule.
3 of 21 late departures made up the time and arrived on time, 14% of them. Only 5 left on time and still arrived late.
The worst days
Worst days for DL 3128
The latest arrival of the period was on 13 February 2026, 8 hours 8 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 |
|---|---|---|
| 13 February 2026 | 8 hours 8 minutes | Carrier |
| 26 July 2026 | 4 hours 23 minutes | Carrier |
| 16 March 2026 | 3 hours 17 minutes | Late-arriving aircraft |
| 7 December 2025 | 3 hours 11 minutes | Late-arriving aircraft |
| 5 February 2026 | 1 hour 32 minutes | Carrier |
Delay causes
Why DL 3128 runs late
Carrier accounts for 51% of the 1,881 delay minutes carriers reported here, and the remaining four split what is left.
- 51%Carrier
- 43%Late-arriving aircraft
- 5%National Airspace System
- 1%Extreme weather
43% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 1,881 reported delay minutes here, that single category outweighs weather by 43 to one. The split is drawn from 1,881 delay minutes reported on DL 3128.
Cancellations run at 3.64%, against 1.89% nationally. That is roughly one flight in 25 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 2.2% 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.
DL 3128 is not only a MSY to ATL flight. It also flew ATL to MSY (326 flights, 93.0% 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. 330 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 |
|---|---|---|---|---|---|
| ATL to MSYthin sample | 326 | 93.0% | 54 min | 3.68% | A− |
What to do with this
Booking DL 3128
For a booking, the cancellation rate is the figure to plan around on DL 3128: 3.64% of its 330 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- MSY to ATL, every carrier and departure
- ATL to MSY, the return direction
- Delta Air Lines 2522 on the same route89.5%
- Delta Air Lines 1534 on the same route91.5%
- Delta Air Lines 2542 on the same route85.7%
- Delta Air Lines 1547 on the same route90.6%
- Delta Air Lines 3157 on the same route76.2%
- Louis Armstrong New Orleans International (MSY) 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.