Flight number record

DL 2443

Delta Air Lines · New York to Detroit

Route: JFK → DTW
Departs: 16:30
Flights: 317
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2443, check with Delta Air Lines.

DL 2443 lands a B, 3 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 close to two hours on average. That is a workable record, not a spotless one. That rests on 317 flights, with a median arrival 16 minutes early.

On time

80.8%

Arrivals under 15 minutes late, of 308 completed flights

Avg delay

111 min

Across delayed arrivals only, not all flights

Cancelled

2.84%

National rate is 1.81%

1 hour+ late

9.4%

National rate is 8.1%

These figures cover 317 flights between July 2025 and June 2026. Beyond the headline rate, 9.4% 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 2443 flies

DL 2443 flies JFK to DTW without a single fixed slot. Its most common scheduled departure was 16:30, used on 65 of 317 flights, with 16:40 (50 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 16:3065 flights20.5%
Departs 16:4050 flights15.8%

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 16:30 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and DL 2443 runs 8 points better at 80.8%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 2443 next to JFK to DTW

Every carrier on JFK to DTW combined arrived on time 76.1% of the time across 1,221 flights, so DL 2443 is 5 points ahead of it. Delta flew 776 flights on the same city pair under all its flight numbers, including this one, and those ran 81.1% on time. Across its whole network Delta Air Lines managed 81.6%, close to this flight's figure.

DL 2443 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2443thin sample	317	80.8%	111 min	2.84%	B
All Delta Air Lines on JFK–DTW	776	81.1%	99 min	2.45%	B
All carriers on JFK–DTW	1,221	76.1%	84 min	2.95%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2443 quarter by quarter

Quarter by quarter DL 2443 held fairly steady: 76.7% in Jul–Sep 2025, 86.1% in Oct–Dec 2025, 76.6% in Jan–Mar 2026 and 84.0% in Apr–Jun 2026. A spread of 10 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights76.7%
Oct–Dec 202580 flights86.1%
Jan–Mar 202668 flights76.6%
Apr–Jun 202677 flights84.0%

Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2443 ranged from 75.6% on Sunday to 85.7% on Friday. With about 45 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 2443 runs late

One category carries most of the weight here. Carrier accounts for 42% of the 6,562 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.

Carrier
42%
National Airspace System
33%
Late-arriving aircraft
17%
Extreme weather
8%

33% 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 2,141 minutes out of 6,562, against a national NAS share of 21%. The split is drawn from 6,562 delay minutes reported on DL 2443.

Cancellations run at 2.84%, against 1.81% nationally. That is roughly one flight in 40 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. 9.4% 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 509 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.

Every one of the 317 flights under DL 2443 in the data flew JFK to DTW. The number was not reused on any other city pair, which makes this a clean record of one route.

One caution: this is a thin sample. 317 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 2443

For a booking, the cancellation rate is the figure to plan around on DL 2443: 2.84% of its 317 scheduled flights did not operate. A late arrival costs close to two hours, 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