Flight profile · Delta Air Lines
DL1285
Chicago (MDW) to Atlanta (ATL) · scheduled 6:00 AM – 9:00 AM
How DL1285 performs
559 operations, 2024-06-07 to 2026-06-30.
DL1285 arrived on time 90.5% of the time, against 80.8% for all MDW → ATL flights — this specific departure is 9.8 percentage points better than the route as a whole. Against Delta Air Lines’s own flights on this route it is 4.3 points better.
Source: US DOT Bureau of Transportation Statistics · 559 operations between 2024-06-07 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL1285 | 90.5% | 1.43% | -15 min | 4.2% | 559 |
| Delta Air Lines on MDW → ATL | 86.3% | 1.58% | -15 min | 5.7% | 4,355 |
| All MDW → ATL flights | 80.8% | 1.40% | -8 min | 6.3% | 11,001 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-06-07 to 2026-06-30
Other routes DL1285 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 |
|---|---|---|---|
| FLL→ATL Fort Lauderdale to Atlanta | 2025-11-09 – 2025-12-19 | 41 | — |
| LAX→SMF Los Angeles to Sacramento | 2025-06-08 – 2025-10-04 | 117 | 62.1% |
| PNS→ATL Pensacola to Atlanta | 2024-05-07 – 2024-06-06 | 31 | — |
| MSP→SNA Minneapolis to Santa Ana | 2024-04-09 – 2024-05-06 | 28 | — |
| MCO→SLC Orlando to Salt Lake City | 2024-03-10 – 2024-04-08 | 30 | — |
| SLC→MCO Salt Lake City to Orlando | 2024-03-10 – 2024-04-08 | 30 | — |
| SLC→DEN Salt Lake City to Denver | 2024-01-08 – 2024-03-09 | 62 | — |
| RSW→JFK Fort Myers to New York | 2023-12-16 – 2024-01-07 | 23 | — |
| ATL→SJC Atlanta to San Jose | 2023-12-07 – 2023-12-15 | 3 | — |
| DFW→BOS Dallas–Fort Worth to Boston | 2023-12-09 – 2023-12-09 | 1 | — |
| IND→ATL Indianapolis to Atlanta | 2023-11-05 – 2023-12-06 | 13 | — |
| RIC→ATL Richmond to Atlanta | 2023-07-01 – 2023-10-27 | 75 | — |
| ATL→RIC Atlanta to Richmond | 2023-07-01 – 2023-10-27 | 73 | — |
| ATL→HSV Atlanta to Huntsville | 2023-10-14 – 2023-10-21 | 2 | — |
| HSV→ATL Huntsville to Atlanta | 2023-10-14 – 2023-10-21 | 2 | — |
| ATL→LEX Atlanta to Lexington | 2023-09-09 – 2023-10-08 | 30 | — |
| LEX→ATL Lexington to Atlanta | 2023-09-09 – 2023-10-08 | 30 | — |
| BOS→LGA Boston to New York | 2023-09-05 – 2023-09-05 | 1 | — |
Because the same number has served different journeys, the statistics above describe only the route DL1285 currently operates. Blending them would produce an average of two different flights.
Why DL1285 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 DL1285 on MDW → ATL. 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 MDW → ATL
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| DL1063 | Delta Air Lines | 88.6% | 16 min early | 982 |
| DL2417 | Delta Air Lines | 87.1% | 17 min early | 721 |
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 559 records of DL1285 operating MDW → ATL, 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.