Flight profile · Delta Air Lines
DL503
Atlanta (ATL) to Portland (PDX) · scheduled 4:45 PM – 7:03 PM
How DL503 performs
963 operations, 2023-07-01 to 2026-06-30.
DL503 arrived on time 77.7% of the time, against 80.2% for all ATL → PDX flights — this specific departure is 2.4 percentage points worse than the route as a whole. Against Delta Air Lines’s own flights on this route it is 3.4 points worse.
Source: US DOT Bureau of Transportation Statistics · 963 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL503 | 77.7% | 0.42% | -3 min | 6.8% | 963 |
| Delta Air Lines on ATL → PDX | 81.1% | 0.79% | -5 min | 4.8% | 3,803 |
| All ATL → PDX flights | 80.2% | 0.75% | -4 min | 5.3% | 4,291 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does DL503 run worse on particular days?
Saturday is historically the most reliable day and Sunday the least, a gap of 16.4 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 DL503 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 |
|---|---|---|---|
| ATL→TYS Atlanta to Knoxville/Maryville | 2025-02-16 – 2025-02-16 | 1 | — |
| TYS→ATL Knoxville/Maryville to Atlanta | 2025-02-16 – 2025-02-16 | 1 | — |
| MSP→LAS Minneapolis to Las Vegas | 2025-01-09 – 2025-01-10 | 2 | — |
| PDX→ATL Portland to Atlanta | 2023-09-25 – 2024-03-06 | 38 | — |
| FLL→ATL Fort Lauderdale to Atlanta | 2024-01-12 – 2024-01-12 | 1 | — |
| LAS→ATL Las Vegas to Atlanta | 2024-01-08 – 2024-01-08 | 1 | — |
| BDL→ATL Hartford to Atlanta | 2023-10-28 – 2023-11-04 | 6 | — |
| ATL→BDL Atlanta to Hartford | 2023-10-29 – 2023-10-30 | 2 | — |
| RSW→ATL Fort Myers to Atlanta | 2023-10-10 – 2023-10-25 | 8 | — |
Because the same number has served different journeys, the statistics above describe only the route DL503 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 963 records of DL503 operating ATL → PDX, 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.