Flight number record

DL 323

Delta Air Lines · Atlanta to New York

Route: ATL → LGA
Departs: 07:30
Flights: 336
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 323, check with Delta Air Lines.

DL 323 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 77.6%. When something does go wrong the average delay runs about 50 minutes. That rests on 336 flights, with a median arrival 9 minutes early.

Set against the rest of the country, DL 323's record is 14 points better than the US average of 77.6%. That gap is worth roughly 137 fewer late arrivals for every thousand flights.

On time

91.3%

Arrivals under 15 minutes late, of 323 completed flights

Avg delay

49 min

Across delayed arrivals only, not all flights

Cancelled

3.27%

National rate is 1.81%

1 hour+ late

2.8%

National rate is 8.1%

These figures cover 336 flights between July 2025 and June 2026. The median arrival is 9 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 323 flies

DL 323 is scheduled to leave Atlanta (ATL) at 07:30 local time and reach New York (LGA) at 09:46. That slot held for 327 of the 336 scheduled departures in the data, so the figures below describe one steady operation rather than a number that moved around the clock.

Departs 07:30327 flights97.3%

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 07:30 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 323 runs 2 points better at 91.3%. 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 323 next to ATL to LGA

Every carrier on ATL to LGA combined arrived on time 73.4% of the time across 8,344 flights, so DL 323 is 18 points ahead of it. Delta flew 4,936 flights on the same city pair under all its flight numbers, including this one, and those ran 76.7% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 10 points.

DL 323 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 323thin sample	336	91.3%	49 min	3.27%	A−
All Delta Air Lines on ATL–LGA	4,936	76.7%	66 min	2.96%	B
All carriers on ATL–LGA	8,344	73.4%	75 min	3.61%	C−
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 323 quarter by quarter

Quarter by quarter DL 323 held fairly steady: 95.4% in Jul–Sep 2025, 88.5% in Oct–Dec 2025, 91.7% in Jan–Mar 2026 and 89.5% 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 202591 flights95.4%
Oct–Dec 202580 flights88.5%
Jan–Mar 202676 flights91.7%
Apr–Jun 202689 flights89.5%

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

By weekday, DL 323 ranged from 85.7% on Wednesday to 96.0% on Tuesday. With about 48 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 323 runs late

One category carries most of the weight here. Carrier accounts for 51% of the 1,374 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.

Carrier
51%
National Airspace System
43%
Extreme weather
4%
Late-arriving aircraft
2%

The largest share of delay minutes, 51%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 700 of the 1,374 delay minutes reported here. The split is drawn from 1,374 delay minutes reported on DL 323.

Cancellations run at 3.27%, 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 2.8% 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.

The 762 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

Every one of the 336 flights under DL 323 in the data flew ATL to LGA. 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. 336 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 323

For a booking, the cancellation rate is the figure to plan around on DL 323: 3.27% of its 336 scheduled flights did not operate. A late arrival costs about 50 minutes, 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