Flight number record
DL 3091
Delta Air Lines · Atlanta to Charleston
- Route
- ATL → CHS
- Departs
- 08:05
- Flights
- 359
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 16 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 359 flights, with a median arrival 8 minutes early.
Set against the rest of the country, DL 3091's record is 16 points better than the US average of 77.3%. That gap is worth roughly 156 fewer late arrivals for every thousand flights.
Key figures
On time
92.9%
Arrivals under 15 minutes late, of 354 completed flights
Avg delay
63 min
Across delayed arrivals only, not all flights
Cancelled
1.11%
National rate is 1.89%
1 hour+ late
2.3%
National rate is 8.3%
These figures cover 359 flights between September 2025 and August 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.
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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 43 of 359 flights.
- Departs 08:0543 flights12.0%
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 08:05 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 3091 runs 9 points better at 92.9%. 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 3091 next to ATL to CHS
Every carrier on ATL to CHS combined arrived on time 82.3% of the time across 3,235 flights, so DL 3091 is 11 points ahead of it. Delta flew 3,232 flights on the same city pair under all its flight numbers, including this one, and those ran 82.3% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 12 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 3091thin sample | 359 | 92.9% | 63 min | 1.11% | A |
| All Delta Air Lines on ATL–CHS | 3,232 | 82.3% | 56 min | 1.67% | B |
| All carriers on ATL–CHS | 3,235 | 82.3% | 56 min | 1.67% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 3091 quarter by quarter
DL 3091 did not run the same all year. Its best quarter was Jul–Sep 2025 at 100.0% on time and its weakest Jan–Mar 2026 at 89.5%, a swing of 11 points on roughly 72 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 flights100.0%
- Oct–Dec 202588 flights94.3%
- Jan–Mar 202689 flights89.5%
- Apr–Jun 202690 flights93.3%
- Jul–Sep 202662 flights91.8%
Scale runs 80% to 100%.
By weekday, DL 3091 ranged from 86.5% on Monday to 97.8% on Saturday. With about 51 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 3091 runs when it is late
The 25 late arrivals split 7 under half an hour, 10 between 30 and 60 minutes, and 8 an hour or more.
- 15+ min early71 flights20.1%
- Within 15 min258 flights72.9%
- 15–29 min late7 flights2.0%
- 30–59 min late10 flights2.8%
- 1–2 hours late3 flights0.8%
- 2+ hours late5 flights1.4%
Scale runs 0% to 100%.
Share of 354 completed flights by arrival against schedule.
A late pushback is often recovered here: of 30 departures that left 15 minutes late or more, 10 still arrived on time. Only 5 left on time and still arrived late.
The worst days
Worst days for DL 3091
The latest arrival of the period was on 28 April 2026, 4 hours 17 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 28 April 2026 | 4 hours 17 minutes | Late-arriving aircraft |
| 5 April 2026 | 2 hours 36 minutes | Carrier |
| 19 July 2026 | 2 hours 21 minutes | Carrier |
| 16 March 2026 | 2 hours 12 minutes | National Airspace System |
| 20 February 2026 | 2 hours 4 minutes | Carrier |
Delay causes
Why DL 3091 runs late
Carrier accounts for 61% of the 1,580 delay minutes carriers reported here, and the remaining four split what is left.
- 61%Carrier
- 19%National Airspace System
- 11%Late-arriving aircraft
- 9%Extreme weather
The largest share of delay minutes, 61%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 968 of the 1,580 delay minutes reported here. The split is drawn from 1,580 delay minutes reported on DL 3091.
Cancellations sit at 1.11% against a national 1.89%, which is ordinary. Diversions add another 0.28%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 2.3% 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.
DL 3091 is not only a ATL to CHS flight. It also flew CHS to ATL (357 flights, 92.7% 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. 359 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| CHS to ATLthin sample | 357 | 92.7% | 90 min | 0.84% | 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: 92.9% on time and 1.11% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- ATL to CHS, every carrier and departure
- CHS to ATL, the return direction
- Delta Air Lines 2850 on the same route80.1%
- Delta Air Lines 3107 on the same route90.5%
- Delta Air Lines 2179 on the same route86.3%
- Delta Air Lines 2493 on the same route80.8%
- Delta Air Lines 1381 on the same route81.6%
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Charleston International (CHS) 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.