Flight number record

DL 2321

Delta Air Lines · New York to Fort Lauderdale

Route: LGA → FLL
Departs: 15:10
Flights: 252
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2321, check with Delta Air Lines.

DL 2321 draws a C−. About one flight in three arrives at least 15 minutes late, and the typical late arrival is about an hour behind schedule. Build slack into anything you connect to. That rests on 252 flights, with a median arrival 2 minutes early.

The national on-time rate over the same period is 77.3%, so DL 2321 runs 10 points behind the country as a whole. Across a thousand flights that is about 102 extra late arrivals.

On time

67.1%

Arrivals under 15 minutes late, of 243 completed flights

Avg delay

64 min

Across delayed arrivals only, not all flights

Cancelled

3.17%

National rate is 1.89%

1 hour+ late

12.3%

National rate is 8.3%

These figures cover 252 flights between September 2025 and August 2026. Beyond the headline rate, 12.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.

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Schedule

When DL 2321 flies

DL 2321 flies LGA to FLL without a single fixed slot. Its most common scheduled departure was 15:10, used on 77 of 252 flights, with 15:40 (47 flights) next.

Departs 15:1077 flights30.6%
Departs 15:4047 flights18.7%

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 15:10 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and DL 2321 runs 5 points worse at 67.1%. 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 2321 next to LGA to FLL

Every carrier on LGA to FLL combined arrived on time 67.9% of the time across 4,715 flights, so DL 2321 is about level with it. Delta flew 1,589 flights on the same city pair under all its flight numbers, including this one, and those ran 70.6% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 14 points.

DL 2321 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2321thin sample	252	67.1%	64 min	3.17%	C−
All Delta Air Lines on LGA–FLL	1,589	70.6%	66 min	3.90%	C−
All carriers on LGA–FLL	4,715	67.9%	75 min	4.56%	C−
Delta Air Lines, whole network	1,039,517	81.1%	71 min	1.74%	B

Across the year

DL 2321 quarter by quarter

Quarter by quarter DL 2321 held fairly steady: 68.6% in Jan–Mar 2026, 65.5% in Apr–Jun 2026 and 69.0% in Jul–Sep 2026. A spread of 4 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Oct–Dec 202512 flights—
Jan–Mar 202690 flights68.6%
Apr–Jun 202688 flights65.5%
Jul–Sep 202662 flights69.0%

Scale runs 55% to 75%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2321 did best on Tuesday at 76.5% on time and worst on Sunday at 57.1%. Each day rests on about 36 flights, so a gap of 19 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late DL 2321 runs when it is late

DL 2321 often beats the schedule: 78 of 243 completed flights, 32%, arrived 15 minutes or more early. The 80 late arrivals split 18 under half an hour, 32 between 30 and 60 minutes, and 30 an hour or more.

15+ min early78 flights32.1%
Within 15 min85 flights35.0%
15–29 min late18 flights7.4%
30–59 min late32 flights13.2%
1–2 hours late22 flights9.1%
2+ hours late8 flights3.3%

Scale runs 0% to 100%.

Share of 243 completed flights by arrival against schedule.

17 of 80 late departures made up the time and arrived on time, 21% of them. In the other direction, 17 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 FLL.

The worst days

Worst days for DL 2321

The latest arrival of the period was on 21 July 2026, 4 hours 33 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).

The latest arrivals of DL 2321 in the period
Date	Arrived late by	Largest filed cause
21 July 2026	4 hours 33 minutes	National Airspace System
17 March 2026	3 hours 31 minutes	Carrier
26 January 2026	2 hours 54 minutes	Extreme weather
10 January 2026	2 hours 35 minutes	Carrier
18 March 2026	2 hours 27 minutes	Carrier

Delay causes

Why DL 2321 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 5,094 reported delay minutes.

National Airspace System
40%
Carrier
30%
Late-arriving aircraft
28%
Extreme weather
2%

40% 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 2,044 minutes out of 5,094, against a national NAS share of 21%. The split is drawn from 5,094 delay minutes reported on DL 2321.

Cancellations run at 3.17%, against 1.89% 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

12.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.

The 1,076 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.

The same number turns up on three other city pairs in the data, including FLL to LGA (186), LGA to MIA (39) and MIA to LGA (39), but none flew often enough under DL 2321 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LGA to FLL only.

One caution: this is a thin sample. 252 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 2321

For a booking, the cancellation rate is the figure to plan around on DL 2321: 3.17% of its 252 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