Flight profile · Delta Air Lines
DL2934
Detroit (DTW) to New York (JFK) · scheduled 9:25 PM – 6:45 PM
How DL2934 performs
708 operations, June 2024 – July 2026.
DL2934 arrived on time 73.1% of the time, against 79.7% for all DTW → JFK flights, so this departure is 6.6 percentage points worse than the route as a whole. Against Delta Air Lines’ own flights on this route it is 1.8 points worse.
Source: US DOT Bureau of Transportation Statistics · 708 operations, June 2024 – July 2026 · If DL2934 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where DL2934 is right now
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| DL2934 | 73.1% | 2.40% | -8 min | 11.8% | 708 |
| Delta Air Lines on DTW → JFK | 74.9% | 2.48% | -7 min | 10.4% | 1,732 |
| All DTW → JFK flights | 79.7% | 2.71% | -9 min | 8.8% | 4,570 |
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – July 2026
Why DL2934 runs late
Where US DOT attributed the delay minutes on this flight.
airspace and airport capacity, including weather-driven flow control
crew, maintenance, boarding and fueling, all within the carrier’s control
the inbound aircraft was late, so this flight started late
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for DL2934 on DTW → JFK. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering June 2024 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies DL2934 comes in late, and what that does to the departure.
The aircraft flying DL2934 came in 15 or more minutes late on 18% of the departures where its previous flight is known. There are not enough departures in both groups to say how the flight left after a late one and after an on-time one.
Each departure is matched to the flight the same aircraft flew into DTW just before it, using the tail number in the DOT file, 623 of 693 departures in all. A departure is left out when that flight is unknown, was cancelled or diverted, or the aircraft had sat for more than 12 hours. A flight the airline cancelled never left and is not in the count, and one flown by a substitute aircraft is matched to the aircraft that flew it, not to the one first planned.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late |
|---|---|
| DL2934 | 18% |
| Network, same turn | 17% |
The schedule leaves a normal turn: enough time to clean and board if the aircraft is on time, little to spare if it is not.
The network row is every flight with a scheduled turn of 60 to 89 minutes. How often DL2934’s aircraft landed 15 or more minutes late is about the same as the network’s. There are not enough departures in both groups to compare how it left.
More: Which Flight Numbers Pay for a Late Aircraft lists the flight numbers that pass a late aircraft on.
Source: US DOT Bureau of Transportation Statistics · Data covering June 2024 – July 2026
From pushback to gate
When it leaves DTW late, does that still matter by the time it reaches JFK?
DL2934 pushes back an average of 23.8 minutes late and reaches the gate at JFK an average of 10.5 minutes late. The 13.3 minutes between those two figures are slack the published schedule already carries, which is why a late pushback on this flight does not reliably become a late arrival. Its 18.9 minutes on the taxiways at DTW is about what any departure from the airport in that hour spends.
On arrival at JFK, DL2934 spends 15.8 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is 4.4 minutes longer than a typical JFK arrival (11.5 min).
Departure delay is averaged over every pushback and arrival delay over every completed arrival, so the two counts differ by the flights that never reached JFK. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 35,035 departures from DTW scheduled in the clock hour DL2934 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at JFK (351,546 flights), not just DL2934’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – July 2026
The hour it leaves DTW
Part of any flight’s record belongs to the clock rather than to the flight. DL2934 has one departure time, so this is what that time is worth.
On-time arrival rate. 35,035 departures from DTW are scheduled in the 9 PM–10 PM hour over the period, against 388,632 across the whole day.
DL2934 is scheduled out of DTW at 9:25 PM, in the 9 PM–10 PM bank. Departures from DTW in that hour arrive on time 78.1% of the time against 79.6% across the airport’s whole day, so the hour DL2934 leaves in is an ordinary one for DTW and explains nothing about its record either way.
The two airport figures cover every departure from DTW to every destination, so they describe the slot rather than this journey — the like-for-like comparison against the route is above. Hours are scheduled local, and a number whose schedule moved between banks inside the period has no single hour and is not described here at all. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · June 2024 – July 2026 · Hours below 120 departures are not scored.
Other routes DL2934 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| ATL→CHS Atlanta to Charleston | May 7, 2024 – June 6, 2024 | 31 | — |
| CHS→ATL Charleston to Atlanta | May 9, 2024 – June 6, 2024 | 16 | — |
| ORD→LGA Chicago to New York | April 9, 2024 – May 6, 2024 | 28 | — |
| STL→ATL St. Louis to Atlanta | July 1, 2023 – April 8, 2024 | 147 | 83.0% |
| ATL→STL Atlanta to St. Louis | July 1, 2023 – April 6, 2024 | 147 | 88.4% |
| ATL→MIA Atlanta to Miami | December 7, 2023 – January 7, 2024 | 27 | — |
| MIA→ATL Miami to Atlanta | December 7, 2023 – January 7, 2024 | 27 | — |
| PBI→HPN West Palm Beach to White Plains | November 10, 2023 – December 6, 2023 | 26 | — |
Because the same number has served different journeys, the statistics above describe only the route DL2934 currently operates. Blending them would produce an average of two different flights.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
68 min late
against a median of 8 min early
DL2934 has an average that understates its risk: a typical arrival is 8 min early, but the worst tenth are 76 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.
Percentiles over 708 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering June 2024 – July 2026
Data and methodology
Calculated by FlyerIntel from 708 records of DL2934 operating DTW → JFK, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
Full methodology · Data sources · Report a problem
Related research: Most and Least Reliable Flight Numbers · The Delay You Inherit · Making Up Time in the Air
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