Flight number record

DL 3091

Delta Air Lines · Atlanta to Charleston

Route: ATL → CHS
Departs: 08:05
Flights: 350
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 3091, check with Delta Air Lines.

DL 3091 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 an hour. That rests on 350 flights, with a median arrival 8 minutes early.

Set against the rest of the country, DL 3091's record is 15 points better than the US average of 77.6%. That gap is worth roughly 149 fewer late arrivals for every thousand flights.

On time

92.5%

Arrivals under 15 minutes late, of 345 completed flights

Avg delay

65 min

Across delayed arrivals only, not all flights

Cancelled

1.14%

National rate is 1.81%

1 hour+ late

2.6%

National rate is 8.1%

These figures cover 350 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 3091 flies

DL 3091 flies ATL to CHS without a single fixed slot. Its most common scheduled departure was 08:05, used on 39 of 350 flights. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 08:0539 flights11.1%

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 08:05 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and DL 3091 runs 8 points better at 92.5%. 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 3091 next to ATL to CHS

Every carrier on ATL to CHS combined arrived on time 83.7% of the time across 3,213 flights, so DL 3091 is 9 points ahead of it. Delta flew 3,210 flights on the same city pair under all its flight numbers, including this one, and those ran 83.7% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 11 points.

DL 3091 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 3091thin sample	350	92.5%	65 min	1.14%	A
All Delta Air Lines on ATL–CHS	3,210	83.7%	56 min	1.62%	B
All carriers on ATL–CHS	3,213	83.7%	56 min	1.62%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 3091 quarter by quarter

Quarter by quarter DL 3091 held fairly steady: 92.7% in Jul–Sep 2025, 94.3% in Oct–Dec 2025, 89.5% in Jan–Mar 2026 and 93.3% 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 202583 flights92.7%
Oct–Dec 202588 flights94.3%
Jan–Mar 202689 flights89.5%
Apr–Jun 202690 flights93.3%

Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 3091 did best on Saturday at 100.0% on time and worst on Monday at 84.6%. Each day rests on about 50 flights, so a gap of 15 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 3091 runs late

One category carries most of the weight here. Carrier accounts for 63% of the 1,677 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
63%
National Airspace System
19%
Late-arriving aircraft
10%
Extreme weather
7%

The largest share of delay minutes, 63%, 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 1,059 of the 1,677 delay minutes reported here. The split is drawn from 1,677 delay minutes reported on DL 3091.

Cancellations sit at 1.14% against a national 1.81%, which is ordinary. Diversions add another 0.29%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 2.6% 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 3091 is not only a ATL to CHS flight. It also flew CHS to ATL (348 flights, 93.0% 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. 350 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 3091
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
CHS to ATLthin sample	348	93.0%	89 min	0.86%	A+

What to do with this

Booking DL 3091

For a booking, DL 3091 has one of the better records a US domestic flight can show: 92.5% on time and 1.14% 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