Flight number record
DL 2443
Delta Air Lines · New York to Detroit
- Route
- JFK → DTW
- Departs
- 16:30
- Flights
- 308
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 308 flights, with a median arrival 13 minutes early.
Key figures
On time
80.3%
Arrivals under 15 minutes late, of 300 completed flights
Avg delay
93 min
Across delayed arrivals only, not all flights
Cancelled
2.60%
National rate is 1.89%
1 hour+ late
10.3%
National rate is 8.3%
These figures cover 308 flights between September 2025 and August 2026. Beyond the headline rate, 10.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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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 114 of 308 flights, with 16:40 (53 flights) and 16:29 (31 flights) next.
- Departs 16:30114 flights37.0%
- Departs 16:4053 flights17.2%
- Departs 16:2931 flights10.1%
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 16:30 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and DL 2443 runs 8 points better at 80.3%. 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 2443 next to JFK to DTW
Every carrier on JFK to DTW combined arrived on time 75.6% of the time across 1,215 flights, so DL 2443 is 5 points ahead of it. Delta flew 770 flights on the same city pair under all its flight numbers, including this one, and those ran 80.2% on time. Across its whole network Delta Air Lines managed 81.1%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2443thin sample | 308 | 80.3% | 93 min | 2.60% | B |
| All Delta Air Lines on JFK–DTW | 770 | 80.2% | 94 min | 3.77% | B− |
| All carriers on JFK–DTW | 1,215 | 75.6% | 80 min | 4.61% | B− |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2443 quarter by quarter
DL 2443 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.3% on time and its weakest Jul–Sep 2026 at 63.5%, a swing of 30 points on roughly 62 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 flights93.3%
- Oct–Dec 202580 flights86.1%
- Jan–Mar 202668 flights76.6%
- Apr–Jun 202677 flights84.0%
- Jul–Sep 202653 flights63.5%
Scale runs 55% to 100%.
By weekday, DL 2443 ranged from 75.6% on Sunday to 82.0% on Monday. With about 44 flights behind each day, a spread of 6 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 2443 runs when it is late
DL 2443 often beats the schedule: 143 of 300 completed flights, 48%, arrived 15 minutes or more early. When DL 2443 is late it tends to be very late: 31 of its 59 late arrivals were an hour or more behind, and 17 were two hours or more.
- 15+ min early143 flights47.7%
- Within 15 min98 flights32.7%
- 15–29 min late15 flights5.0%
- 30–59 min late13 flights4.3%
- 1–2 hours late14 flights4.7%
- 2+ hours late17 flights5.7%
Scale runs 0% to 100%.
Share of 300 completed flights by arrival against schedule.
18 of 65 late departures made up the time and arrived on time, 28% of them. 12 flights left on time and still arrived late.
The worst days
Worst days for DL 2443
The latest arrival of the period was on 19 May 2026, 6 hours 24 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The five worst days are spread across May, January and July, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 19 May 2026 | 6 hours 24 minutes | National Airspace System |
| 18 January 2026 | 6 hours 4 minutes | Late-arriving aircraft |
| 20 May 2026 | 6 hours 1 minute | Extreme weather |
| 28 July 2026 | 4 hours 38 minutes | National Airspace System |
| 9 July 2026 | 4 hours 33 minutes | Late-arriving aircraft |
Delay causes
Why DL 2443 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 5,504 reported delay minutes.
- 34%Late-arriving aircraft
- 32%National Airspace System
- 25%Carrier
- 9%Extreme weather
32% 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 1,766 minutes out of 5,504, against a national NAS share of 21%. The split is drawn from 5,504 delay minutes reported on DL 2443.
Cancellations run at 2.60%, against 1.89% nationally. That is about 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
10.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection 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.
Every one of the 308 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. 308 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: 2.60% of its 308 scheduled flights did not operate. A late arrival costs an hour and a half, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- JFK to DTW, every carrier and departure
- DTW to JFK, the return direction
- John F. Kennedy International (JFK) delay statistics
- Detroit Metropolitan Wayne County (DTW) 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.