DL503
DL503 (Delta Air Lines) is a multi-stop service on 4 routes, busiest Atlanta to Portland. Of 598 departures recorded from October 2024 to July 2026, 80.9% left on time, according to the US BTS.
- On-time departures80.9%of 598 flights
- Average delay11.5 min
- July 202630▼ 3.2%vs July 2025
- Cancelled0.3%
- Legs flown under this number4
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 17 | 24 | ▲ 41.2% |
| February | 16 | 24 | ▲ 50.0% |
| March | 27 | 31 | ▲ 14.8% |
| April | 30 | 30 | 0.0% |
| May | 31 | 31 | 0.0% |
| June | 30 | 30 | 0.0% |
| July | 31 | 30 | ▼ 3.2% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 30 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 182 | 200 | ▲ 9.9% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 82.4% | 87.0% | ▲ 5.6% |
| February | 87.5% | 87.5% | 0.0% |
| March | 92.6% | 83.3% | ▼ 10.0% |
| April | 76.7% | 90.0% | ▲ 17.4% |
| May | 71.0% | 90.3% | ▲ 27.3% |
| June | 56.7% | 73.3% | ▲ 29.4% |
| July | 67.7% | 63.3% | ▼ 6.5% |
| August | 80.7% | – | – |
| September | 96.7% | – | – |
| October | 83.3% | – | in progress |
| November | 72.4% | – | – |
| December | 90.3% | – | – |
| Year-to-date average (Jan–Jul) | 76.4% | 82.1% | ▲ 7.5% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 2 |
according to the US BTS · October 2024 → July 2026
This is a historical record of departures already flown, not a forecast for your flight.
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 99.7% 596
- Cancelled 0.3% 2
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ATL PDX Hartsfield Jackson Atlanta International Airport – Portland International Airport | 3,489 | 11.2 min | 81.1% | 594 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 14 | 14 | 92.9% | 0 |
| November 2024 | 20 | 20 | 90.0% | 0 |
| December 2024 | 31 | 31 | 80.7% | 0 |
| January 2025 | 17 | 17 | 82.4% | 0 |
| February 2025 | 16 | 16 | 87.5% | 0 |
| March 2025 | 27 | 27 | 92.6% | 0 |
| April 2025 | 30 | 30 | 76.7% | 0 |
| May 2025 | 31 | 31 | 71.0% | 0 |
| June 2025 | 30 | 30 | 56.7% | 0 |
| July 2025 | 31 | 31 | 67.7% | 0 |
| August 2025 | 31 | 31 | 80.7% | 0 |
| September 2025 | 30 | 30 | 96.7% | 0 |
| October 2025 | 30 | 30 | 83.3% | 0 |
| November 2025 | 29 | 29 | 72.4% | 0 |
| December 2025 | 31 | 31 | 90.3% | 0 |
| January 2026 | 24 | 23 | 87.0% | 1 |
| February 2026 | 24 | 24 | 87.5% | 0 |
| March 2026 | 31 | 30 | 83.3% | 1 |
| April 2026 | 30 | 30 | 90.0% | 0 |
| May 2026 | 31 | 31 | 90.3% | 0 |
| June 2026 | 30 | 30 | 73.3% | 0 |
| July 2026 | 30 | 30 | 63.3% | 0 |