Flight number record
DL 2340
Delta Air Lines · Atlanta to Newark
- Route
- ATL → EWR
- Departs
- 15:25
- Flights
- 272
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2340, check with Delta Air Lines.
DL 2340 draws a D−. About one flight in three arrives at least 15 minutes late, and the typical late arrival is a little over an hour behind schedule. Build slack into anything you connect to. That rests on 272 flights, with a median arrival 3 minutes late.
The national on-time rate over the same period is 77.6%, so DL 2340 runs 13 points behind the country as a whole. Across a thousand flights that is about 132 extra late arrivals.
Key figures
On time
64.4%
Arrivals under 15 minutes late, of 261 completed flights
Avg delay
81 min
Across delayed arrivals only, not all flights
Cancelled
3.31%
National rate is 1.81%
1 hour+ late
13.8%
National rate is 8.1%
These figures cover 272 flights between July 2025 and June 2026. Beyond the headline rate, 13.8% 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 2340 flies
DL 2340 flies ATL to EWR without a single fixed slot. Its most common scheduled departure was 15:25, used on 38 of 272 flights, with 15:37 (31 flights) and 15:44 (30 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 15:2538 flights14.0%
- Departs 15:3731 flights11.4%
- Departs 15:4430 flights11.0%
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 15:25 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and DL 2340 runs 8 points worse at 64.4%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
DL 2340 next to ATL to EWR
Every carrier on ATL to EWR combined arrived on time 72.8% of the time across 6,285 flights, so DL 2340 is 8 points behind it. Delta flew 3,055 flights on the same city pair under all its flight numbers, including this one, and those ran 71.5% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 17 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2340thin sample | 272 | 64.4% | 81 min | 3.31% | D− |
| All Delta Air Lines on ATL–EWR | 3,055 | 71.5% | 66 min | 3.31% | C− |
| All carriers on ATL–EWR | 6,285 | 72.8% | 74 min | 3.34% | C− |
| Delta Air Lines, whole network | 1,038,570 | 81.6% | 71 min | 1.62% | B |
Across the year
DL 2340 quarter by quarter
DL 2340 did not run the same all year. Its best quarter was Apr–Jun 2026 at 72.2% on time and its weakest Jul–Sep 2025 at 49.4%, 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 202591 flights49.4%
- Oct–Dec 20255 flights—
- Jan–Mar 202685 flights70.4%
- Apr–Jun 202691 flights72.2%
Scale runs 40% to 80%. Rows with fewer than 30 flights show a dash.
By weekday, DL 2340 did best on Sunday at 75.8% on time and worst on Thursday at 54.1%. Each day rests on about 39 flights, so a gap of 22 points is worth noticing but could still narrow in another year.
Delay causes
Why DL 2340 runs late
One category carries most of the weight here. National Airspace System accounts for 52% of the 7,559 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.
- 52%National Airspace System
- 37%Carrier
- 8%Late-arriving aircraft
- 3%Extreme weather
The largest share of delay minutes, 37%, 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 2,817 of the 7,559 delay minutes reported here. The split is drawn from 7,559 delay minutes reported on DL 2340.
Cancellations run at 3.31%, against 1.81% nationally. That is about 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
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 13.8% 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 746 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 EWR to ATL (79), but none flew often enough under DL 2340 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ATL to EWR only.
One caution: this is a thin sample. 272 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 2340
For a booking, the cancellation rate is the figure to plan around on DL 2340: 3.31% of its 272 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- ATL to EWR, every carrier and departure
- EWR to ATL, the return direction
- Delta Air Lines 2322 on the same route74.4%
- Frontier Airlines 4602 on the same route56.0%
- Delta Air Lines 2312 on the same route69.9%
- Delta Air Lines 2397 on the same route86.1%
- Delta Air Lines 2498 on the same route56.2%
- Frontier Airlines 1158 on the same route69.4%
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Newark Liberty International (EWR) 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
- How often a connection fails at the major US hubs
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.