Flight number record

DL 3128

Delta Air Lines · New Orleans to Atlanta

Route: MSY → ATL
Departs: 09:05
Flights: 333
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 3128, check with Delta Air Lines.

DL 3128 earns an A−. Nearly every flight arrives 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 77.6%. When something does go wrong the average delay runs a little over an hour. That rests on 333 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 77.6%. That gap is worth roughly 159 fewer late arrivals for every thousand flights.

On time

93.5%

Arrivals under 15 minutes late, of 321 completed flights

Avg delay

74 min

Across delayed arrivals only, not all flights

Cancelled

3.60%

National rate is 1.81%

1 hour+ late

1.9%

National rate is 8.1%

These figures cover 333 flights between July 2025 and June 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.

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 80 of 333 flights, with 10:38 (44 flights) and 09:00 (38 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 09:0580 flights24.0%
Departs 10:3844 flights13.2%
Departs 09:0038 flights11.4%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

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 84.1%, and DL 3128 runs 9 points better at 93.5%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

DL 3128 next to MSY to ATL

Every carrier on MSY to ATL combined arrived on time 83.3% of the time across 4,056 flights, so DL 3128 is 10 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 87.3% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 12 points.

DL 3128 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 3128thin sample	333	93.5%	74 min	3.60%	A−
All Delta Air Lines on MSY–ATL	3,278	87.3%	65 min	1.59%	A
All carriers on MSY–ATL	4,056	83.3%	65 min	1.50%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 3128 quarter by quarter

Quarter by quarter DL 3128 held fairly steady: 97.5% in Jul–Sep 2025, 90.1% in Oct–Dec 2025, 92.7% in Jan–Mar 2026 and 93.2% in Apr–Jun 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202581 flights97.5%
Oct–Dec 202578 flights90.1%
Jan–Mar 202686 flights92.7%
Apr–Jun 202688 flights93.2%

Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 3128 ranged from 90.0% on Tuesday to 95.9% on Friday. With about 48 flights behind each day, a spread of 6 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 3128 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 47% of the 1,544 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
47%
Carrier
46%
National Airspace System
7%
Extreme weather
1%

47% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 1,544 reported delay minutes here, that single category outweighs weather by 47 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 1,544 delay minutes reported on DL 3128.

Cancellations run at 3.60%, against 1.81% nationally. That is about one flight in 30 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 1.9% land an hour or more behind schedule, against 8.1% 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 (329 flights, 94.3% 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. 333 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.

Other routes flown as DL 3128
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
ATL to MSYthin sample	329	94.3%	57 min	3.34%	A−

What to do with this

Booking DL 3128

For a booking, the cancellation rate is the figure to plan around on DL 3128: 3.60% of its 333 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.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures