DL506
DL506 (Delta Air Lines) is a multi-stop service on 3 routes, busiest Seattle to Miami. Of 1,048 departures recorded from October 2024 to July 2026, 81.0% left on time, according to the US BTS.
- On-time departures81.0%of 1,048 flights
- Average delay15.1 min
- July 202656▼ 9.7%vs July 2025
- Cancelled1.2%
- Legs flown under this number3
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 | 62 | 31 | ▼ 50.0% |
| February | 56 | 45 | ▼ 19.6% |
| March | 39 | 62 | ▲ 59.0% |
| April | 30 | 42 | ▲ 40.0% |
| May | 31 | 56 | ▲ 80.6% |
| June | 53 | 36 | ▼ 32.1% |
| July | 62 | 56 | ▼ 9.7% |
| August | 62 | – | – |
| September | 60 | – | – |
| October | 62 | – | in progress |
| November | 60 | – | – |
| December | 50 | – | – |
| Year to date (Jan–Jul) | 333 | 328 | ▼ 1.5% |
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 | 77.4% | 87.1% | ▲ 12.5% |
| February | 80.4% | 86.7% | ▲ 7.9% |
| March | 89.7% | 70.7% | ▼ 21.2% |
| April | 100.0% | 81.0% | ▼ 19.0% |
| May | 96.8% | 80.4% | ▼ 17.0% |
| June | 81.1% | 77.8% | ▼ 4.1% |
| July | 73.3% | 85.2% | ▲ 16.2% |
| August | 67.7% | – | – |
| September | 71.7% | – | – |
| October | 91.9% | – | in progress |
| November | 77.2% | – | – |
| December | 83.3% | – | – |
| Year-to-date average (Jan–Jul) | 85.5% | 81.2% | ▼ 5.0% |
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 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 4 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 2 | 2 | 0.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 3 | – | – |
| December | 2 | – | – |
| Year to date (Jan–Jul) | 2 | 6 | ▲ 200.0% |
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 98.8% 1,035
- Cancelled 1.2% 13
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SEA MIA Seattle–Tacoma International Airport – Miami International Airport | 4,379 | 4.0 min | 91.1% | 590 |
| MIA SEA Miami International Airport – Seattle–Tacoma International Airport | 4,379 | 34.6 min | 63.3% | 391 |
| LAS ATL Harry Reid International Airport – Hartsfield Jackson Atlanta International Airport | 2,805 | -0.1 min | 94.0% | 67 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 29 | 29 | 93.1% | 0 |
| December 2024 | 44 | 44 | 72.7% | 0 |
| January 2025 | 62 | 62 | 77.4% | 0 |
| February 2025 | 56 | 56 | 80.4% | 0 |
| March 2025 | 39 | 39 | 89.7% | 0 |
| April 2025 | 30 | 30 | 100.0% | 0 |
| May 2025 | 31 | 31 | 96.8% | 0 |
| June 2025 | 53 | 53 | 81.1% | 0 |
| July 2025 | 62 | 60 | 73.3% | 2 |
| August 2025 | 62 | 62 | 67.7% | 0 |
| September 2025 | 60 | 60 | 71.7% | 0 |
| October 2025 | 62 | 62 | 91.9% | 0 |
| November 2025 | 60 | 57 | 77.2% | 3 |
| December 2025 | 50 | 48 | 83.3% | 2 |
| January 2026 | 31 | 31 | 87.1% | 0 |
| February 2026 | 45 | 45 | 86.7% | 0 |
| March 2026 | 62 | 58 | 70.7% | 4 |
| April 2026 | 42 | 42 | 81.0% | 0 |
| May 2026 | 56 | 56 | 80.4% | 0 |
| June 2026 | 36 | 36 | 77.8% | 0 |
| July 2026 | 56 | 54 | 85.2% | 2 |