Flight profile · Delta Air Lines
DL1403
Atlanta (ATL) to St. Louis (STL) · scheduled 11:00 PM – 11:40 PM
How DL1403 performs
696 operations, 2024-06-07 to 2026-06-30.
DL1403 arrived on time 77.2% of the time, against 81.9% for all ATL → STL flights — this specific departure is 4.7 percentage points worse than the route as a whole. Against Delta Air Lines’s own flights on this route it is 6.8 points worse.
Source: US DOT Bureau of Transportation Statistics · 696 operations between 2024-06-07 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL1403 | 77.2% | 1.58% | -4 min | 8.3% | 696 |
| Delta Air Lines on ATL → STL | 83.9% | 1.14% | -6 min | 4.7% | 6,765 |
| All ATL → STL flights | 81.9% | 1.01% | -6 min | 5.1% | 10,648 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-06-07 to 2026-06-30
Other routes DL1403 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 |
|---|---|---|---|
| MEM→MSP Memphis to Minneapolis | 2025-04-19 – 2025-04-19 | 1 | — |
| RSW→MSP Fort Myers to Minneapolis | 2023-07-01 – 2024-06-06 | 146 | 95.9% |
| LAX→SFO Los Angeles to San Francisco | 2024-04-09 – 2024-05-06 | 28 | — |
| SFO→LAX San Francisco to Los Angeles | 2024-04-09 – 2024-05-06 | 28 | — |
| MSP→ATL Minneapolis to Atlanta | 2024-01-08 – 2024-03-09 | 62 | — |
| DEN→MSP Denver to Minneapolis | 2023-09-11 – 2023-12-15 | 69 | — |
Because the same number has served different journeys, the statistics above describe only the route DL1403 currently operates. Blending them would produce an average of two different flights.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
49 min late
against a median of 4 min early
Percentiles over 696 operations. Cancelled and diverted flights have no arrival time and are counted separately rather than as very late arrivals.
Why DL1403 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 DL1403 on ATL → STL. 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 → STL
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| DL1571 | Delta Air Lines | 89.3% | 8 min early | 919 |
| DL1485 | Delta Air Lines | 84.7% | 6 min early | 802 |
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 696 records of DL1403 operating ATL → STL, 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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