Flight profile · Delta Air Lines
DL1527
Atlanta (ATL) to West Palm Beach (PBI) · scheduled 9:40 AM – 11:35 AM
How DL1527 performs
1,043 operations, 2023-07-01 to 2026-06-30.
DL1527 arrived on time 81.8% of the time, against 75.7% for all ATL → PBI flights — this specific departure is 6.1 percentage points better than the route as a whole. Against Delta Air Lines’s own flights on this route it is 6.0 points better.
Source: US DOT Bureau of Transportation Statistics · 1,043 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL1527 | 81.8% | 1.15% | -4 min | 3.7% | 1,043 |
| Delta Air Lines on ATL → PBI | 75.7% | 1.24% | -3 min | 7.3% | 11,129 |
| All ATL → PBI flights | 75.7% | 1.18% | -3 min | 7.4% | 11,987 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does DL1527 run worse on particular days?
Tuesday is historically the most reliable day and Friday the least, a gap of 9.4 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30 · Days with fewer than 120 operations are not scored.
Other routes DL1527 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 |
|---|---|---|---|
| PBI→ATL West Palm Beach to Atlanta | 2023-07-01 – 2026-06-30 | 1,000 | 79.7% |
| CVG→FLL Cincinnati / Covington to Fort Lauderdale | 2023-10-28 – 2023-11-04 | 6 | — |
| PHX→DTW Phoenix to Detroit | 2023-10-09 – 2023-10-27 | 19 | — |
Because the same number has served different journeys, the statistics above describe only the route DL1527 currently operates. Blending them would produce an average of two different flights.
Why DL1527 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding, fuelling — within the carrier’s control
airspace and airport capacity, including weather-driven flow control
the inbound aircraft was late, so this flight started late
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for DL1527 on ATL → PBI. 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 → PBI
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| DL1311 | Delta Air Lines | 87.5% | 8 min early | 1,078 |
| DL1190 | Delta Air Lines | 80.4% | 4 min early | 1,067 |
| DL838 | Delta Air Lines | 73.4% | 0 min early | 754 |
| DL1458 | Delta Air Lines | 72.7% | 1 min early | 1,023 |
| DL1495 | Delta Air Lines | 72.5% | 3 min early | 989 |
| DL959 | Delta Air Lines | 70.2% | 1 min late | 736 |
| DL1058 | Delta Air Lines | 68.8% | 0 min early | 975 |
| DL1606 | Delta Air Lines | 68.3% | 0 min early | 992 |
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 1,043 records of DL1527 operating ATL → PBI, 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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