Flight number record

DL 2339

Delta Air Lines · New York to Miami

Route: LGA → MIA
Departs: 10:59
Flights: 310
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2339, check with Delta Air Lines.

DL 2339 sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 310 flights, with a median arrival 5 minutes early.

The national on-time rate over the same period is 77.6%, so DL 2339 runs 7 points behind the country as a whole. Across a thousand flights that is about 67 extra late arrivals.

On time

70.9%

Arrivals under 15 minutes late, of 289 completed flights

Avg delay

64 min

Across delayed arrivals only, not all flights

Cancelled

4.84%

National rate is 1.81%

1 hour+ late

10.0%

National rate is 8.1%

These figures cover 310 flights between July 2025 and June 2026. Beyond the headline rate, 10.0% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When DL 2339 flies

DL 2339 flies LGA to MIA without a single fixed slot. Its most common scheduled departure was 10:59, used on 66 of 310 flights, with 10:55 (64 flights) and 09:30 (38 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 10:5966 flights21.3%
Departs 10:5564 flights20.6%
Departs 09:3038 flights12.3%

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 10:59 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and DL 2339 runs 13 points worse at 70.9%. 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 2339 next to LGA to MIA

Every carrier on LGA to MIA combined arrived on time 70.6% of the time across 6,006 flights, so DL 2339 is about level with it. Delta flew 1,916 flights on the same city pair under all its flight numbers, including this one, and those ran 70.2% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 11 points.

DL 2339 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2339thin sample	310	70.9%	64 min	4.84%	C−
All Delta Air Lines on LGA–MIA	1,916	70.2%	69 min	3.97%	C−
All carriers on LGA–MIA	6,006	70.6%	87 min	4.13%	C−
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2339 quarter by quarter

Quarter by quarter DL 2339 held fairly steady: 70.9% in Jul–Sep 2025, 67.0% in Oct–Dec 2025, 74.1% in Jan–Mar 2026 and 73.5% 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 202592 flights70.9%
Oct–Dec 202592 flights67.0%
Jan–Mar 202690 flights74.1%
Apr–Jun 202636 flights73.5%

Scale runs 60% to 80%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2339 did best on Saturday at 81.0% on time and worst on Sunday at 53.8%. Each day rests on about 44 flights, so a gap of 27 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 2339 runs late

One category carries most of the weight here. National Airspace System accounts for 56% of the 5,379 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.

National Airspace System
56%
Carrier
28%
Late-arriving aircraft
17%

56% 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 3,001 minutes out of 5,379, against a national NAS share of 21%. The split is drawn from 5,379 delay minutes reported on DL 2339.

Cancellations run at 4.84%, against 1.81% 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.0% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

The 1,096 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.

The same number turns up on one other city pair in the data, including MIA to LGA (193), but none flew often enough under DL 2339 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LGA to MIA only.

One caution: this is a thin sample. 310 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 2339

For a booking, the cancellation rate is the figure to plan around on DL 2339: 4.84% of its 310 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures