Flight number record

DL 1514

Delta Air Lines · New York to Miami

Route: JFK → MIA
Departs: 11:10
Flights: 364
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1514, check with Delta Air Lines.

DL 1514 lands a B, 2 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 364 flights, with a median arrival 9 minutes early.

On time

79.2%

Arrivals under 15 minutes late, of 355 completed flights

Avg delay

57 min

Across delayed arrivals only, not all flights

Cancelled

1.92%

National rate is 1.81%

1 hour+ late

6.2%

National rate is 8.1%

These figures cover 364 flights between July 2025 and June 2026. The median arrival is 9 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.

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 193 of 364 flights, with 11:05 (55 flights) and 11:12 (53 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 11:10193 flights53.0%
Departs 11:0555 flights15.1%
Departs 11:1253 flights14.6%

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 11:10 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and DL 1514 runs level with that at 79.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 1514 next to JFK to MIA

Every carrier on JFK to MIA combined arrived on time 77.3% of the time across 4,553 flights, so DL 1514 is 2 points ahead of it. Delta flew 1,620 flights on the same city pair under all its flight numbers, including this one, and those ran 76.1% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 2 points.

DL 1514 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1514thin sample	364	79.2%	57 min	1.92%	B
All Delta Air Lines on JFK–MIA	1,620	76.1%	74 min	3.21%	B−
All carriers on JFK–MIA	4,553	77.3%	93 min	2.88%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	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 Jan–Mar 2026 at 70.9%, a swing of 20 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 202592 flights80.9%
Oct–Dec 202591 flights73.0%
Jan–Mar 202690 flights70.9%
Apr–Jun 202691 flights91.2%

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

By weekday, DL 1514 did best on Wednesday at 90.2% on time and worst on Sunday at 68.0%. Each day rests on about 52 flights, so a gap of 22 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1514 runs late

One category carries most of the weight here. National Airspace System accounts for 44% of the 4,224 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
44%
Carrier
43%
Late-arriving aircraft
10%
Extreme weather
4%

The largest share of delay minutes, 43%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,795 of the 4,224 delay minutes reported here. The split is drawn from 4,224 delay minutes reported on DL 1514.

Cancellations sit at 1.92% against a national 1.81%, which is ordinary. Diversions add another 0.55%.

Connections and routes

What a delay on this flight costs

6.2% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says 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. 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 JFK (192), but none flew often enough under DL 1514 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to JFK to MIA only.

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.

What to do with this

Booking DL 1514

For a booking, read DL 1514 as 79.2% on time with 1.92% cancelled over 364 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures