Flight number record
DL 2440
Delta Air Lines · Jacksonville to Atlanta
- Route
- JAX → ATL
- Departs
- 06:30
- Flights
- 275
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2440, check with Delta Air Lines.
DL 2440 earns an A. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 17 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 2.2 hours. That rests on 275 flights, with a median arrival 10 minutes early.
Set against the rest of the country, DL 2440's record is 17 points better than the US average of 77.3%. That gap is worth roughly 165 fewer late arrivals for every thousand flights.
Key figures
On time
93.8%
Arrivals under 15 minutes late, of 272 completed flights
Avg delay
130 min
Across delayed arrivals only, not all flights
Cancelled
1.09%
National rate is 1.89%
1 hour+ late
2.9%
National rate is 8.3%
These figures cover 275 flights between September 2025 and August 2026. The median arrival is 10 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When DL 2440 flies
DL 2440 flies JAX to ATL without a single fixed slot. Its most common scheduled departure was 06:30, used on 121 of 275 flights, with 06:10 (48 flights) and 06:05 (46 flights) next.
- Departs 06:30121 flights44.0%
- Departs 06:1048 flights17.5%
- Departs 06:0546 flights16.7%
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 06:30 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 2440 runs 5 points better at 93.8%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
DL 2440 next to JAX to ATL
Every carrier on JAX to ATL combined arrived on time 83.8% of the time across 4,077 flights, so DL 2440 is 10 points ahead of it. Delta flew 3,846 flights on the same city pair under all its flight numbers, including this one, and those ran 85.9% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 13 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2440thin sample | 275 | 93.8% | 130 min | 1.09% | A |
| All Delta Air Lines on JAX–ATL | 3,846 | 85.9% | 80 min | 1.64% | A |
| All carriers on JAX–ATL | 4,077 | 83.8% | 80 min | 1.69% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2440 quarter by quarter
Quarter by quarter DL 2440 held fairly steady: 93.3% in Jul–Sep 2025, 92.0% in Oct–Dec 2025, 93.0% in Jan–Mar 2026 and 97.0% in Apr–Jun 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights93.3%
- Oct–Dec 202587 flights92.0%
- Jan–Mar 202689 flights93.0%
- Apr–Jun 202667 flights97.0%
- Jul–Sep 20262 flights—
Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, DL 2440 did best on Wednesday at 100.0% on time and worst on Monday at 85.0%. Each day rests on about 39 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2440 runs when it is late
DL 2440 often beats the schedule: 85 of 272 completed flights, 31%, arrived 15 minutes or more early. The 17 late arrivals split 4 under half an hour, 5 between 30 and 60 minutes, and 8 an hour or more.
- 15+ min early85 flights31.3%
- Within 15 min170 flights62.5%
- 15–29 min late4 flights1.5%
- 30–59 min late5 flights1.8%
- 1–2 hours late4 flights1.5%
- 2+ hours late4 flights1.5%
Scale runs 0% to 100%.
Share of 272 completed flights by arrival against schedule.
Only 19 of 272 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for DL 2440
The latest arrival of the period was on 21 September 2025, 8 hours 50 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 21 September 2025 | 8 hours 50 minutes | Carrier |
| 25 September 2025 | 6 hours 37 minutes | Carrier |
| 16 March 2026 | 5 hours 49 minutes | National Airspace System |
| 15 December 2025 | 5 hours 3 minutes | Carrier |
| 9 March 2026 | 1 hour 36 minutes | Carrier |
Delay causes
Why DL 2440 runs late
Carrier accounts for 75% of the 2,202 delay minutes carriers reported here, and the remaining four split what is left.
- 75%Carrier
- 24%National Airspace System
- 1%Extreme weather
The largest share of delay minutes, 75%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,654 of the 2,202 delay minutes reported here. The split is drawn from 2,202 delay minutes reported on DL 2440.
Cancellations sit at 1.09% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 2.9% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
Every one of the 275 flights under DL 2440 in the data flew JAX to ATL. 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. 275 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 2440
For a booking, DL 2440 has one of the better records a US domestic flight can show: 93.8% on time and 1.09% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- JAX to ATL, every carrier and departure
- ATL to JAX, the return direction
- Delta Air Lines 2569 on the same route90.6%
- Delta Air Lines 2720 on the same route78.2%
- Delta Air Lines 2923 on the same route82.4%
- Delta Air Lines 2722 on the same route93.1%
- Delta Air Lines 2627 on the same route76.8%
- Delta Air Lines 2326 on the same route89.5%
- Jacksonville International (JAX) delay statistics
- Hartsfield-Jackson Atlanta International (ATL) 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
- Worst months to fly in the US, ranked by the data
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.