Flight number record

DL 2323

Delta Air Lines · New York to Austin

Route: JFK → AUS
Departs: 12:59
Flights: 296
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2323, check with Delta Air Lines.

DL 2323 lands a B, 4 points better than the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 296 flights, with a median arrival 15 minutes early.

Set against the rest of the country, DL 2323's record is 4 points better than the US average of 77.3%. That gap is worth roughly 44 fewer late arrivals for every thousand flights.

On time

81.7%

Arrivals under 15 minutes late, of 289 completed flights

Avg delay

65 min

Across delayed arrivals only, not all flights

Cancelled

2.03%

National rate is 1.89%

1 hour+ late

7.3%

National rate is 8.3%

These figures cover 296 flights between September 2025 and August 2026. The median arrival is 15 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 2323 flies

DL 2323 flies JFK to AUS without a single fixed slot. Its most common scheduled departure was 12:59, used on 53 of 296 flights, with 11:10 (42 flights) and 13:10 (31 flights) next.

Departs 12:5953 flights17.9%
Departs 11:1042 flights14.2%
Departs 13:1031 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 12:59 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and DL 2323 runs 3 points better at 81.7%. 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 2323 next to JFK to AUS

Every carrier on JFK to AUS combined arrived on time 80.8% of the time across 2,227 flights, so DL 2323 is about level with it. Delta flew 1,283 flights on the same city pair under all its flight numbers, including this one, and those ran 83.2% on time. Across its whole network Delta Air Lines managed 81.1%, close to this flight's figure.

DL 2323 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2323thin sample	296	81.7%	65 min	2.03%	B
All Delta Air Lines on JFK–AUS	1,283	83.2%	66 min	3.20%	B−
All carriers on JFK–AUS	2,227	80.8%	96 min	3.46%	B−
Delta Air Lines, whole network	1,039,517	81.1%	71 min	1.74%	B

Across the year

DL 2323 quarter by quarter

DL 2323 did not run the same all year. Its best quarter was Jan–Mar 2026 at 88.6% on time and its weakest Jul–Sep 2026 at 70.8%, a swing of 18 points on roughly 74 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 202525 flights—
Oct–Dec 202568 flights82.1%
Jan–Mar 202674 flights88.6%
Apr–Jun 202680 flights79.7%
Jul–Sep 202649 flights70.8%

Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2323 did best on Wednesday at 89.8% on time and worst on Monday at 77.1%. Each day rests on about 42 flights, so a gap of 13 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late DL 2323 runs when it is late

DL 2323 often beats the schedule: 146 of 289 completed flights, 51%, arrived 15 minutes or more early. The 53 late arrivals split 14 under half an hour, 18 between 30 and 60 minutes, and 21 an hour or more.

15+ min early146 flights50.5%
Within 15 min90 flights31.1%
15–29 min late14 flights4.8%
30–59 min late18 flights6.2%
1–2 hours late15 flights5.2%
2+ hours late6 flights2.1%

Scale runs 0% to 100%.

Share of 289 completed flights by arrival against schedule.

9 of 35 late departures made up the time and arrived on time, 26% of them. In the other direction, 27 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 AUS.

The worst days

Worst days for DL 2323

The latest arrival of the period was on 9 July 2026, 5 hours 10 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The five worst days are spread across July, December, February and June, with no single month standing out.

The latest arrivals of DL 2323 in the period
Date	Arrived late by	Largest filed cause
9 July 2026	5 hours 10 minutes	National Airspace System
1 December 2025	4 hours 55 minutes	Carrier
24 February 2026	3 hours 19 minutes	Late-arriving aircraft
19 June 2026	2 hours 55 minutes	Carrier
7 December 2025	2 hours 16 minutes	Late-arriving aircraft

Delay causes

Why DL 2323 runs late

National Airspace System accounts for 51% of the 3,457 delay minutes carriers reported here, and the remaining four split what is left.

National Airspace System
51%
Carrier
30%
Late-arriving aircraft
18%
Extreme weather
1%

51% 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 1,760 minutes out of 3,457, against a national NAS share of 21%. The split is drawn from 3,457 delay minutes reported on DL 2323.

Cancellations sit at 2.03% against a national 1.89%, which is ordinary. Diversions add another 0.34%.

Connections and routes

What a delay on this flight costs

7.3% 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.

At 1,521 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.

DL 2323 is not only a JFK to AUS flight. It also flew AUS to JFK (263 flights, 71.9% 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. 296 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 2323
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
AUS to JFKthin sample	263	71.9%	81 min	2.28%	C

What to do with this

Booking DL 2323

For a booking, read DL 2323 as 81.7% on time with 2.03% cancelled over 296 flights. Those are rates from the past twelve months, not a forecast for any particular day.

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