Flight number record

DL 2312

Delta Air Lines · Atlanta to Newark

Route: ATL → EWR
Departs: 14:23
Flights: 359
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2312, check with Delta Air Lines.

DL 2312 sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 6 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 359 flights, with a median arrival 1 minute early.

The national on-time rate over the same period is 77.3%, so DL 2312 runs 6 points behind the country as a whole. Across a thousand flights that is about 57 extra late arrivals.

On time

71.6%

Arrivals under 15 minutes late, of 338 completed flights

Avg delay

56 min

Across delayed arrivals only, not all flights

Cancelled

5.29%

National rate is 1.89%

1 hour+ late

7.4%

National rate is 8.3%

These figures cover 359 flights between September 2025 and August 2026. On-time means an arrival less than 15 minutes after the scheduled gate time, the same threshold the Department of Transportation uses in its own reports. Cancelled and diverted flights are excluded from the on-time rate and counted separately, which is why the cancellation column matters on its own.

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Schedule

When DL 2312 flies

DL 2312 flies ATL to EWR without a single fixed slot. Its most common scheduled departure was 14:23, used on 36 of 359 flights.

Departs 14:2336 flights10.0%

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 14:23 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and DL 2312 runs level with that at 71.6%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

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Against the route

DL 2312 next to ATL to EWR

Every carrier on ATL to EWR combined arrived on time 72.3% of the time across 6,246 flights, so DL 2312 is about level with it. Delta flew 3,038 flights on the same city pair under all its flight numbers, including this one, and those ran 71.5% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 10 points.

DL 2312 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2312thin sample	359	71.6%	56 min	5.29%	C−
All Delta Air Lines on ATL–EWR	3,038	71.5%	69 min	3.82%	C−
All carriers on ATL–EWR	6,246	72.3%	78 min	3.78%	C−
Delta Air Lines, whole network	1,039,517	81.1%	71 min	1.74%	B

Across the year

DL 2312 quarter by quarter

DL 2312 did not run the same all year. Its best quarter was Apr–Jun 2026 at 84.9% on time and its weakest Jan–Mar 2026 at 63.8%, a swing of 21 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 flights80.0%
Oct–Dec 202592 flights65.1%
Jan–Mar 202687 flights63.8%
Apr–Jun 202688 flights84.9%
Jul–Sep 202662 flights67.9%

Scale runs 55% to 90%.

By weekday, DL 2312 did best on Wednesday at 80.4% on time and worst on Friday at 62.0%. Each day rests on about 51 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late DL 2312 runs when it is late

The 96 late arrivals split 36 under half an hour, 35 between 30 and 60 minutes, and 25 an hour or more.

15+ min early38 flights11.2%
Within 15 min204 flights60.4%
15–29 min late36 flights10.7%
30–59 min late35 flights10.4%
1–2 hours late17 flights5.0%
2+ hours late8 flights2.4%

Scale runs 0% to 100%.

Share of 338 completed flights by arrival against schedule.

16 of 91 late departures made up the time and arrived on time, 18% of them. In the other direction, 21 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at EWR.

The worst days

Worst days for DL 2312

The latest arrival of the period was on 21 July 2026, 9 hours 2 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The five worst days are spread across July, September, December, March and February, with no single month standing out.

The latest arrivals of DL 2312 in the period
Date	Arrived late by	Largest filed cause
21 July 2026	9 hours 2 minutes	National Airspace System
6 September 2025	4 hours 15 minutes	National Airspace System
7 December 2025	3 hours 16 minutes	Late-arriving aircraft
8 March 2026	3 hours 10 minutes	Carrier
19 February 2026	3 hours 6 minutes	Carrier

Delay causes

Why DL 2312 runs late

National Airspace System accounts for 57% of the 5,395 delay minutes carriers reported here, and the remaining four split what is left.

National Airspace System
57%
Carrier
34%
Late-arriving aircraft
9%
Extreme weather
1%

57% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 3,056 minutes out of 5,395, against a national NAS share of 21%. The split is drawn from 5,395 delay minutes reported on DL 2312.

Cancellations run at 5.29%, against 1.89% nationally. That is about one flight in twenty 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

7.4% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.

The 746 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.

DL 2312 is not only a ATL to EWR flight. It also flew EWR to ATL (305 flights, 69.4% 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. 359 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 2312
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
EWR to ATLthin sample	305	69.4%	91 min	5.57%	C−

What to do with this

Booking DL 2312

For a booking, the cancellation rate is the figure to plan around on DL 2312: 5.29% of its 359 scheduled flights did not operate. A late arrival costs about 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures