Flight profile · Delta Air Lines
DL1663
Atlanta (ATL) to Charleston (CHS) · scheduled 9:30 PM – 11:53 PM
How DL1663 performs
495 operations, 2024-06-07 to 2026-06-30.
DL1663 arrived on time 72.7% of the time, against 82.9% for all ATL → CHS flights — this specific departure is 10.2 percentage points worse than the route as a whole. Against Delta Air Lines’s own flights on this route it is 10.2 points worse.
Source: US DOT Bureau of Transportation Statistics · 495 operations between 2024-06-07 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL1663 | 72.7% | 1.62% | -2 min | 7.6% | 495 |
| Delta Air Lines on ATL → CHS | 82.9% | 1.33% | -4 min | 4.9% | 8,869 |
| All ATL → CHS flights | 82.9% | 1.33% | -4 min | 4.9% | 8,876 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-06-07 to 2026-06-30
Other routes DL1663 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| DTW→ATL Detroit to Atlanta | 2026-02-15 – 2026-02-15 | 1 | — |
| DEN→SLC Denver to Salt Lake City | 2025-10-06 – 2025-12-18 | 71 | — |
| DTW→OMA Detroit to Omaha | 2025-09-19 – 2025-09-19 | 1 | — |
| ATL→FLL Atlanta to Fort Lauderdale | 2025-01-04 – 2025-01-04 | 1 | — |
| SEA→ORD Seattle to Chicago | 2024-04-09 – 2024-05-06 | 28 | — |
| SLC→SFO Salt Lake City to San Francisco | 2024-03-10 – 2024-04-08 | 30 | — |
| ATL→TPA Atlanta to Tampa | 2024-01-13 – 2024-03-09 | 12 | — |
| TPA→ATL Tampa to Atlanta | 2024-01-13 – 2024-03-09 | 12 | — |
| DFW→DTW Dallas–Fort Worth to Detroit | 2024-01-08 – 2024-03-08 | 50 | — |
Because the same number has served different journeys, the statistics above describe only the route DL1663 currently operates. Blending them would produce an average of two different flights.
Why DL1663 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding, fuelling — within the carrier’s control
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for DL1663 on ATL → CHS. A single late flight can carry more than one cause, and only delays of fifteen minutes or more are attributed at all.
Other departures on ATL → CHS
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| DL3091 | Delta Air Lines | 92.3% | 7 min early | 621 |
| DL3107 | Delta Air Lines | 88.7% | 4 min early | 748 |
| DL2179 | Delta Air Lines | 86.5% | 5 min early | 740 |
| DL2850 | Delta Air Lines | 79.4% | 4 min early | 1,038 |
| DL2493 | Delta Air Lines | 77.6% | 3 min early | 773 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 495 records of DL1663 operating ATL → CHS, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
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