Flight number record

DL 2440

Delta Air Lines · Jacksonville to Atlanta

Route: JAX → ATL
Departs: 06:30
Flights: 335
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2440, check with Delta Air Lines.

DL 2440 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 15 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 2.4 hours. That rests on 335 flights, with a median arrival 9 minutes early.

Set against the rest of the country, DL 2440's record is 15 points better than the US average of 77.6%. That gap is worth roughly 151 fewer late arrivals for every thousand flights.

On time

92.7%

Arrivals under 15 minutes late, of 331 completed flights

Avg delay

145 min

Across delayed arrivals only, not all flights

Cancelled

1.19%

National rate is 1.81%

1 hour+ late

3.9%

National rate is 8.1%

These figures cover 335 flights between July 2025 and June 2026. The median arrival is 9 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.

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 335 flights, with 06:10 (88 flights) and 06:20 (56 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:30121 flights36.1%
Departs 06:1088 flights26.3%
Departs 06:2056 flights16.7%

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 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 3 points better at 92.7%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

DL 2440 next to JAX to ATL

Every carrier on JAX to ATL combined arrived on time 84.9% of the time across 4,018 flights, so DL 2440 is 8 points ahead of it. Delta flew 3,830 flights on the same city pair under all its flight numbers, including this one, and those ran 86.4% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 11 points.

DL 2440 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2440thin sample	335	92.7%	145 min	1.19%	A
All Delta Air Lines on JAX–ATL	3,830	86.4%	84 min	1.49%	A
All carriers on JAX–ATL	4,018	84.9%	83 min	1.52%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2440 quarter by quarter

Quarter by quarter DL 2440 held fairly steady: 90.1% 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 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights90.1%
Oct–Dec 202587 flights92.0%
Jan–Mar 202689 flights93.0%
Apr–Jun 202667 flights97.0%

Scale runs 80% 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 83.0%. Each day rests on about 48 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 2440 runs late

One category carries most of the weight here. Carrier accounts for 83% of the 3,479 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.

Carrier
83%
National Airspace System
17%
Extreme weather
1%

The largest share of delay minutes, 83%, 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 2,874 of the 3,479 delay minutes reported here. The split is drawn from 3,479 delay minutes reported on DL 2440.

Cancellations sit at 1.19% against a national 1.81%, 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 3.9% land an hour or more behind schedule, against 8.1% 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 335 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. 335 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: 92.7% on time and 1.19% cancelled. That is a base rate, not a promise about any single day.

Where to go next

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.

Key figures