Flight number record
DL 2339
Delta Air Lines · Miami to New York
- Route
- MIA → LGA
- Departs
- 08:15
- Flights
- 255
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2339, check with Delta Air Lines.
DL 2339 lands a B−, level with 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 255 flights, with a median arrival 10 minutes early.
Key figures
On time
77.9%
Arrivals under 15 minutes late, of 240 completed flights
Avg delay
63 min
Across delayed arrivals only, not all flights
Cancelled
5.10%
National rate is 1.89%
1 hour+ late
7.9%
National rate is 8.3%
These figures cover 255 flights between September 2025 and August 2026. The median arrival is 10 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 2339 flies
DL 2339 flies MIA to LGA without a single fixed slot. Its most common scheduled departure was 08:15, used on 49 of 255 flights, with 13:30 (40 flights) and 13:59 (40 flights) next.
- Departs 08:1549 flights19.2%
- Departs 13:3040 flights15.7%
- Departs 13:5940 flights15.7%
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 08:15 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 2339 runs 6 points worse at 77.9%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
DL 2339 next to MIA to LGA
Every carrier on MIA to LGA combined arrived on time 67.4% of the time across 5,955 flights, so DL 2339 is 11 points ahead of it. Delta flew 1,916 flights on the same city pair under all its flight numbers, including this one, and those ran 73.4% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2339thin sample | 255 | 77.9% | 63 min | 5.10% | B− |
| All Delta Air Lines on MIA–LGA | 1,916 | 73.4% | 64 min | 3.91% | C− |
| All carriers on MIA–LGA | 5,955 | 67.4% | 77 min | 4.21% | C− |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2339 quarter by quarter
DL 2339 did not run the same all year. Its best quarter was Jul–Sep 2026 at 86.4% on time and its weakest Jan–Mar 2026 at 74.4%, a swing of 12 points on roughly 85 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.
- Oct–Dec 202512 flights—
- Jan–Mar 202690 flights74.4%
- Apr–Jun 202691 flights82.0%
- Jul–Sep 202662 flights86.4%
Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, DL 2339 did best on Wednesday at 85.3% on time and worst on Sunday at 59.4%. Each day rests on about 36 flights, so a gap of 26 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2339 runs when it is late
DL 2339 often beats the schedule: 85 of 240 completed flights, 35%, arrived 15 minutes or more early. The 53 late arrivals split 14 under half an hour, 20 between 30 and 60 minutes, and 19 an hour or more.
- 15+ min early85 flights35.4%
- Within 15 min102 flights42.5%
- 15–29 min late14 flights5.8%
- 30–59 min late20 flights8.3%
- 1–2 hours late14 flights5.8%
- 2+ hours late5 flights2.1%
Scale runs 0% to 100%.
Share of 240 completed flights by arrival against schedule.
13 of 57 late departures made up the time and arrived on time, 23% of them. 9 flights left on time and still arrived late.
The worst days
Worst days for DL 2339
The latest arrival of the period was on 31 July 2026, 6 hours 10 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across July, August, March and May, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 31 July 2026 | 6 hours 10 minutes | Late-arriving aircraft |
| 2 August 2026 | 3 hours 5 minutes | Carrier |
| 29 March 2026 | 2 hours 24 minutes | Late-arriving aircraft |
| 27 August 2026 | 2 hours 13 minutes | National Airspace System |
| 24 May 2026 | 2 hours 11 minutes | Carrier |
Delay causes
Why DL 2339 runs late
Late-arriving aircraft accounts for 50% of the 3,328 delay minutes carriers reported here, and the remaining four split what is left.
- 50%Late-arriving aircraft
- 29%Carrier
- 20%National Airspace System
- 1%Extreme weather
50% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,328 reported delay minutes here, that single category outweighs weather by 37 to one. The split is drawn from 3,328 delay minutes reported on DL 2339.
Cancellations run at 5.10%, 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
7.9% 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 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.
The same number turns up on one other city pair in the data, including LGA to MIA (248), 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 MIA to LGA only.
One caution: this is a thin sample. 255 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: 5.10% of its 255 scheduled flights did not operate. A late arrival costs about an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- MIA to LGA, every carrier and departure
- LGA to MIA, the return direction
- Delta Air Lines 2387 on the same route86.5%
- American Airlines 1389 on the same route57.1%
- Miami International (MIA) delay statistics
- LaGuardia (LGA) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
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 ; recomputed monthly. How this data is collected.