Flight number record
DL 3055
Delta Air Lines · Charleston to Atlanta
- Route
- CHS → ATL
- Departs
- 05:10
- Flights
- 354
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 3055, check with Delta Air Lines.
DL 3055 earns an A. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 19 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 354 flights, with a median arrival 16 minutes early.
Set against the rest of the country, DL 3055's record is 19 points better than the US average of 77.3%. That gap is worth roughly 189 fewer late arrivals for every thousand flights.
Key figures
On time
96.2%
Arrivals under 15 minutes late, of 346 completed flights
Avg delay
74 min
Across delayed arrivals only, not all flights
Cancelled
1.98%
National rate is 1.89%
1 hour+ late
2.3%
National rate is 8.3%
These figures cover 354 flights between September 2025 and August 2026. The median arrival is 16 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 3055 flies
DL 3055 flies CHS to ATL without a single fixed slot. Its most common scheduled departure was 05:10, used on 99 of 354 flights, with 05:25 (79 flights) and 05:27 (60 flights) next.
- Departs 05:1099 flights28.0%
- Departs 05:2579 flights22.3%
- Departs 05:2760 flights16.9%
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 05:10 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 3055 runs 7 points better at 96.2%. 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 3055 next to CHS to ATL
Every carrier on CHS to ATL combined arrived on time 88.9% of the time across 3,234 flights, so DL 3055 is 7 points ahead of it. Delta flew 3,231 flights on the same city pair under all its flight numbers, including this one, and those ran 89.0% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 15 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 3055thin sample | 354 | 96.2% | 74 min | 1.98% | A |
| All Delta Air Lines on CHS–ATL | 3,231 | 89.0% | 79 min | 1.73% | A |
| All carriers on CHS–ATL | 3,234 | 88.9% | 79 min | 1.73% | A |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 3055 quarter by quarter
Quarter by quarter DL 3055 held fairly steady: 100.0% in Jul–Sep 2025, 95.5% in Oct–Dec 2025, 95.2% in Jan–Mar 2026, 98.8% in Apr–Jun 2026 and 93.0% in Jul–Sep 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 202530 flights100.0%
- Oct–Dec 202590 flights95.5%
- Jan–Mar 202689 flights95.2%
- Apr–Jun 202687 flights98.8%
- Jul–Sep 202658 flights93.0%
Scale runs 85% to 100%.
By weekday, DL 3055 ranged from 92.3% on Monday to 100.0% on Thursday. With about 51 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 3055 runs when it is late
DL 3055 often beats the schedule: 201 of 346 completed flights, 58%, arrived 15 minutes or more early. When DL 3055 is late it tends to be very late: 8 of its 13 late arrivals were an hour or more behind, and 2 were two hours or more.
- 15+ min early201 flights58.1%
- Within 15 min132 flights38.2%
- 15–29 min late3 flights0.9%
- 30–59 min late2 flights0.6%
- 1–2 hours late6 flights1.7%
- 2+ hours late2 flights0.6%
Scale runs 0% to 100%.
Share of 346 completed flights by arrival against schedule.
Only 14 of 346 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 3055
The latest arrival of the period was on 10 March 2026, 3 hours 42 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 10 March 2026 | 3 hours 42 minutes | Carrier |
| 19 August 2026 | 2 hours 3 minutes | Carrier |
| 1 November 2025 | 1 hour 46 minutes | Carrier |
| 11 July 2026 | 1 hour 33 minutes | Carrier |
| 13 March 2026 | 1 hour 23 minutes | Carrier |
Delay causes
Why DL 3055 runs late
Carrier accounts for 95% of the 960 delay minutes carriers reported here, and the remaining four split what is left.
- 95%Carrier
- 5%National Airspace System
The largest share of delay minutes, 95%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 914 of the 960 delay minutes reported here. The split is drawn from 960 delay minutes reported on DL 3055.
Cancellations sit at 1.98% 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.
Every one of the 354 flights under DL 3055 in the data flew CHS 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. 354 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 3055
For a booking, read DL 3055 as 96.2% on time with 1.98% cancelled over 354 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- CHS to ATL, every carrier and departure
- ATL to CHS, the return direction
- Delta Air Lines 2124 on the same route93.0%
- Delta Air Lines 3091 on the same route92.7%
- Delta Air Lines 2179 on the same route83.8%
- Delta Air Lines 3107 on the same route89.5%
- Delta Air Lines 1664 on the same route92.2%
- Delta Air Lines 1381 on the same route81.2%
- Charleston International (CHS) 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
- How to read this site: grades, sample sizes, and honest caveats
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.