Flight number record
DL 1514
Delta Air Lines · New York to Miami
- Route
- JFK → MIA
- Departs
- 11:10
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1514, check with Delta Air Lines.
DL 1514 lands a B−, level with the national rate of 77.3%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 364 flights, with a median arrival 8 minutes early.
Key figures
On time
77.0%
Arrivals under 15 minutes late, of 352 completed flights
Avg delay
62 min
Across delayed arrivals only, not all flights
Cancelled
3.02%
National rate is 1.89%
1 hour+ late
8.5%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. Beyond the headline rate, 8.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 1514 flies
DL 1514 flies JFK to MIA without a single fixed slot. Its most common scheduled departure was 11:10, used on 187 of 364 flights, with 11:05 (91 flights) next.
- Departs 11:10187 flights51.4%
- Departs 11:0591 flights25.0%
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 11:10 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and DL 1514 runs level with that at 77.0%. 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 1514 next to JFK to MIA
Every carrier on JFK to MIA combined arrived on time 76.8% of the time across 4,526 flights, so DL 1514 is about level with it. Delta flew 1,621 flights on the same city pair under all its flight numbers, including this one, and those ran 75.8% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1514thin sample | 364 | 77.0% | 62 min | 3.02% | B− |
| All Delta Air Lines on JFK–MIA | 1,621 | 75.8% | 71 min | 3.45% | B− |
| All carriers on JFK–MIA | 4,526 | 76.8% | 97 min | 3.12% | B− |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1514 quarter by quarter
DL 1514 did not run the same all year. Its best quarter was Apr–Jun 2026 at 91.2% on time and its weakest Jul–Sep 2026 at 68.4%, a swing of 23 points on roughly 91 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 flights—
- Oct–Dec 202591 flights73.0%
- Jan–Mar 202690 flights70.9%
- Apr–Jun 202691 flights91.2%
- Jul–Sep 202662 flights68.4%
Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1514 did best on Wednesday at 88.0% on time and worst on Sunday at 60.0%. Each day rests on about 52 flights, so a gap of 28 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1514 runs when it is late
DL 1514 often beats the schedule: 132 of 352 completed flights, 38%, arrived 15 minutes or more early. The 81 late arrivals split 28 under half an hour, 23 between 30 and 60 minutes, and 30 an hour or more.
- 15+ min early132 flights37.5%
- Within 15 min139 flights39.5%
- 15–29 min late28 flights8.0%
- 30–59 min late23 flights6.5%
- 1–2 hours late20 flights5.7%
- 2+ hours late10 flights2.8%
Scale runs 0% to 100%.
Share of 352 completed flights by arrival against schedule.
14 of 69 late departures made up the time and arrived on time, 20% of them. In the other direction, 26 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 MIA.
The worst days
Worst days for DL 1514
The latest arrival of the period was on 14 October 2025, 6 hours 2 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 14 October 2025 | 6 hours 2 minutes | Carrier |
| 26 December 2025 | 4 hours 3 minutes | National Airspace System |
| 6 July 2026 | 4 hours | National Airspace System |
| 20 February 2026 | 3 hours 27 minutes | Carrier |
| 21 September 2025 | 3 hours 12 minutes | Carrier |
Delay causes
Why DL 1514 runs late
National Airspace System accounts for 44% of the 4,984 delay minutes carriers reported here, and the remaining four split what is left.
- 44%National Airspace System
- 41%Carrier
- 12%Late-arriving aircraft
- 4%Extreme weather
The largest share of delay minutes, 41%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,043 of the 4,984 delay minutes reported here. The split is drawn from 4,984 delay minutes reported on DL 1514.
Cancellations run at 3.02%, against 1.89% nationally. That is roughly 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
8.5% 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 1,089 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 1514 is not only a JFK to MIA flight. It also flew MIA to JFK (254 flights, 69.1% 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. 364 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| MIA to JFKthin sample | 254 | 69.1% | 92 min | 4.33% | C− |
What to do with this
Booking DL 1514
For a booking, the cancellation rate is the figure to plan around on DL 1514: 3.02% of its 364 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
- JFK to MIA, every carrier and departure
- MIA to JFK, the return direction
- American Airlines 2017 on the same route84.8%
- Delta Air Lines 1528 on the same route84.8%
- Delta Air Lines 1428 on the same route68.7%
- American Airlines 688 on the same route75.2%
- Delta Air Lines 2500 on the same route70.8%
- John F. Kennedy International (JFK) delay statistics
- Miami International (MIA) 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
- What a cancellation rate actually tells you (and what it hides)
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.