Flight number record
DL 2340
Delta Air Lines · Atlanta to Newark
- Route
- ATL → EWR
- Departs
- 15:33
- Flights
- 273
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2340, check with Delta Air Lines.
DL 2340 draws a C−. About one flight in three arrives at least 15 minutes late, and the typical late arrival is close to two hours behind schedule. Build slack into anything you connect to. That rests on 273 flights, with a median arrival 2 minutes late.
The national on-time rate over the same period is 77.3%, so DL 2340 runs 11 points behind the country as a whole. Across a thousand flights that is about 106 extra late arrivals.
Key figures
On time
66.7%
Arrivals under 15 minutes late, of 261 completed flights
Avg delay
100 min
Across delayed arrivals only, not all flights
Cancelled
4.03%
National rate is 1.89%
1 hour+ late
16.1%
National rate is 8.3%
These figures cover 273 flights between September 2025 and August 2026. Beyond the headline rate, 16.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 2340 flies
DL 2340 flies ATL to EWR without a single fixed slot. Its most common scheduled departure was 15:33, used on 77 of 273 flights, with 15:25 (38 flights) and 15:37 (31 flights) next.
- Departs 15:3377 flights28.2%
- Departs 15:2538 flights13.9%
- Departs 15:3731 flights11.4%
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 15:33 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and DL 2340 runs 5 points worse at 66.7%. 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 2340 next to ATL to EWR
Every carrier on ATL to EWR combined arrived on time 72.3% of the time across 6,246 flights, so DL 2340 is 6 points behind it. Delta flew 3,038 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 81.1%, which this flight trails by 14 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2340thin sample | 273 | 66.7% | 100 min | 4.03% | C− |
| All Delta Air Lines on ATL–EWR | 3,038 | 71.5% | 69 min | 3.82% | C− |
| All carriers on ATL–EWR | 6,246 | 72.3% | 78 min | 3.78% | C− |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | 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 2026 at 52.7%, a swing of 20 points on roughly 68 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 flights63.3%
- Oct–Dec 20255 flights—
- Jan–Mar 202685 flights70.4%
- Apr–Jun 202691 flights72.2%
- Jul–Sep 202662 flights52.7%
Scale runs 45% to 80%. Rows with fewer than 30 flights show a dash.
By weekday, DL 2340 did best on Saturday at 75.7% on time and worst on Friday at 56.8%. Each day rests on about 39 flights, so a gap of 19 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2340 runs when it is late
The 87 late arrivals split 21 under half an hour, 24 between 30 and 60 minutes, and 42 an hour or more.
- 15+ min early27 flights10.3%
- Within 15 min147 flights56.3%
- 15–29 min late21 flights8.0%
- 30–59 min late24 flights9.2%
- 1–2 hours late18 flights6.9%
- 2+ hours late24 flights9.2%
Scale runs 0% to 100%.
Share of 261 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 82 departures that left 15 minutes late or more, only 9 made it up before arrival. In the other direction, 14 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at EWR.
The worst days
Worst days for DL 2340
The latest arrival of the period was on 20 May 2026, 8 hours 43 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 20 May 2026 | 8 hours 43 minutes | National Airspace System |
| 20 August 2026 | 7 hours 21 minutes | National Airspace System |
| 27 July 2026 | 7 hours 6 minutes | National Airspace System |
| 12 June 2026 | 6 hours 11 minutes | National Airspace System |
| 22 June 2026 | 5 hours 34 minutes | Carrier |
Delay causes
Why DL 2340 runs late
National Airspace System accounts for 54% of the 8,718 delay minutes carriers reported here, and the remaining four split what is left.
- 54%National Airspace System
- 29%Carrier
- 12%Late-arriving aircraft
- 5%Extreme weather
54% 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 4,715 minutes out of 8,718, against a national NAS share of 21%. The split is drawn from 8,718 delay minutes reported on DL 2340.
Cancellations run at 4.03%, against 1.89% nationally. That is about one flight in 25 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
16.1% 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 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.
The same number turns up on one other city pair in the data, including EWR to ATL (45), 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. 273 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: 4.03% of its 273 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.
Related
Where to go next
- ATL to EWR, every carrier and departure
- EWR to ATL, the return direction
- Delta Air Lines 2397 on the same route85.3%
- Delta Air Lines 2322 on the same route74.5%
- Delta Air Lines 2312 on the same route71.6%
- Frontier Airlines 4602 on the same route55.4%
- Delta Air Lines 2498 on the same route53.8%
- Frontier Airlines 1158 on the same route61.9%
- 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.