Flight number record

DL 1640

Delta Air Lines · Atlanta to Pensacola

Route: ATL → PNS
Departs: 12:59
Flights: 343
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1640, check with Delta Air Lines.

DL 1640 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 10 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 45 minutes. That rests on 343 flights, with a median arrival 8 minutes early.

Set against the rest of the country, DL 1640's record is 10 points better than the US average of 77.6%. That gap is worth roughly 100 fewer late arrivals for every thousand flights.

On time

87.6%

Arrivals under 15 minutes late, of 340 completed flights

Avg delay

44 min

Across delayed arrivals only, not all flights

Cancelled

0.58%

National rate is 1.81%

1 hour+ late

2.1%

National rate is 8.1%

These figures cover 343 flights between July 2025 and June 2026. The median arrival is 8 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 1640 flies

DL 1640 flies ATL to PNS without a single fixed slot. Its most common scheduled departure was 12:59, used on 56 of 343 flights, with 12:40 (43 flights) and 11:00 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 12:5956 flights16.3%
Departs 12:4043 flights12.5%
Departs 11:0035 flights10.2%

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 12:59 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and DL 1640 runs 9 points better at 87.6%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 1640 next to ATL to PNS

Every carrier on ATL to PNS combined arrived on time 83.7% of the time across 2,803 flights, so DL 1640 is 4 points ahead of it. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 6 points.

DL 1640 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1640thin sample	343	87.6%	44 min	0.58%	A+
All Delta Air Lines on ATL–PNS	2,803	83.7%	60 min	1.75%	B
All carriers on ATL–PNS	2,803	83.7%	60 min	1.75%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1640 quarter by quarter

DL 1640 did not run the same all year. Its best quarter was Oct–Dec 2025 at 92.2% on time and its weakest Jan–Mar 2026 at 77.5%, a swing of 15 points on roughly 86 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 202592 flights91.3%
Oct–Dec 202579 flights92.2%
Jan–Mar 202681 flights77.5%
Apr–Jun 202691 flights89.0%

Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1640 did best on Wednesday at 98.0% on time and worst on Friday at 77.6%. Each day rests on about 49 flights, so a gap of 20 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1640 runs late

One category carries most of the weight here. Carrier accounts for 64% of the 1,832 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
64%
Late-arriving aircraft
19%
National Airspace System
16%
Extreme weather
0%

The largest share of delay minutes, 64%, 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 1,173 of the 1,832 delay minutes reported here. The split is drawn from 1,832 delay minutes reported on DL 1640.

Cancellations are rare at 0.58%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 2.1% 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.

DL 1640 is not only a ATL to PNS flight. It also flew PNS to ATL (343 flights, 89.8% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.

One caution: this is a thin sample. 343 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.

Other routes flown as DL 1640
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
PNS to ATLthin sample	343	89.8%	74 min	0.29%	A+

What to do with this

Booking DL 1640

For a booking, DL 1640 has one of the better records a US domestic flight can show: 87.6% on time and 0.58% 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