Flight number record
DL 1534
Delta Air Lines · New Orleans to Atlanta
- Route
- MSY → ATL
- Departs
- 06:20
- Flights
- 362
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1534, check with Delta Air Lines.
DL 1534 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 about an hour. That rests on 362 flights, with a median arrival 8 minutes early.
Set against the rest of the country, DL 1534's record is 14 points better than the US average of 77.3%. That gap is worth roughly 142 fewer late arrivals for every thousand flights.
Key figures
On time
91.5%
Arrivals under 15 minutes late, of 354 completed flights
Avg delay
61 min
Across delayed arrivals only, not all flights
Cancelled
2.21%
National rate is 1.89%
1 hour+ late
3.1%
National rate is 8.3%
These figures cover 362 flights between September 2025 and August 2026. The median arrival is 8 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 1534 flies
DL 1534 flies MSY to ATL without a single fixed slot. Its most common scheduled departure was 06:20, used on 99 of 362 flights, with 06:25 (38 flights) next.
- Departs 06:2099 flights27.3%
- Departs 06:2538 flights10.5%
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 06:20 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 1534 runs 2 points better at 91.5%. 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 1534 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 1534 is 9 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 10 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1534thin sample | 362 | 91.5% | 61 min | 2.21% | 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 1534 quarter by quarter
DL 1534 did not run the same all year. Its best quarter was Jul–Sep 2025 at 100.0% on time and its weakest Oct–Dec 2025 at 88.6%, a swing of 11 points on roughly 72 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 flights100.0%
- Oct–Dec 202590 flights88.6%
- Jan–Mar 202689 flights94.0%
- Apr–Jun 202691 flights88.9%
- Jul–Sep 202662 flights91.9%
Scale runs 80% to 100%.
By weekday, DL 1534 did best on Wednesday at 100.0% on time and worst on Monday at 82.4%. Each day rests on about 52 flights, so a gap of 18 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1534 runs when it is late
The 30 late arrivals split 11 under half an hour, 8 between 30 and 60 minutes, and 11 an hour or more.
- 15+ min early88 flights24.9%
- Within 15 min236 flights66.7%
- 15–29 min late11 flights3.1%
- 30–59 min late8 flights2.3%
- 1–2 hours late8 flights2.3%
- 2+ hours late3 flights0.8%
Scale runs 0% to 100%.
Share of 354 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 20 departures that left 15 minutes late or more, only 2 made it up before arrival. 12 flights left on time and still arrived late.
The worst days
Worst days for DL 1534
The latest arrival of the period was on 17 August 2026, 4 hours 48 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 |
|---|---|---|
| 17 August 2026 | 4 hours 48 minutes | Carrier |
| 7 December 2025 | 3 hours 7 minutes | National Airspace System |
| 4 May 2026 | 2 hours | Carrier |
| 26 December 2025 | 1 hour 59 minutes | Carrier |
| 23 May 2026 | 1 hour 42 minutes | Carrier |
Delay causes
Why DL 1534 runs late
Carrier accounts for 56% of the 1,821 delay minutes carriers reported here, and the remaining four split what is left.
- 56%Carrier
- 39%National Airspace System
- 5%Extreme weather
The largest share of delay minutes, 56%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,018 of the 1,821 delay minutes reported here. The split is drawn from 1,821 delay minutes reported on DL 1534.
Cancellations sit at 2.21% 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 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.
Every one of the 362 flights under DL 1534 in the data flew MSY 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. 362 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 1534
For a booking, read DL 1534 as 91.5% on time with 2.21% cancelled over 362 flights. Those are rates from the past twelve months, not a forecast for any particular day.
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 2542 on the same route85.7%
- Delta Air Lines 3128 on the same route92.8%
- 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
- 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.