DL871
DL871 (Delta Air Lines) flies Salt Lake City to Seattle. Of 604 departures recorded from October 2024 to July 2026, 81.9% left on time, according to the US BTS.
according to the US BTS · Oct 12, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 27 | 26 | ▼ 3.7% |
| February | 22 | 22 | 0.0% |
| March | 26 | 27 | ▲ 3.8% |
| April | 26 | 28 | ▲ 7.7% |
| May | 30 | 31 | ▲ 3.3% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 24 | – | – |
| December | 21 | – | – |
| Year to date (Jan–Jul) | 192 | 195 | ▲ 1.6% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 96.3% | 88.5% | ▼ 8.1% |
| February | 86.4% | 77.3% | ▼ 10.5% |
| March | 76.9% | 80.8% | ▲ 5.0% |
| April | 96.2% | 85.7% | ▼ 10.9% |
| May | 73.3% | 74.2% | ▲ 1.2% |
| June | 70.0% | 80.0% | ▲ 14.3% |
| July | 80.7% | 64.5% | ▼ 20.0% |
| August | 80.7% | – | – |
| September | 90.0% | – | – |
| October | 77.4% | – | in progress |
| November | 82.6% | – | – |
| December | 81.0% | – | – |
| Year-to-date average (Jan–Jul) | 82.8% | 78.7% | ▼ 5.0% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| 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 | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 1 |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
Cancellation share
- Not cancelled 99.7% 602
- 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 |
|---|---|---|---|---|
| SLC SEA Salt Lake City International Airport – Seattle–Tacoma International Airport | 1,107 | 8.1 min | 81.9% | 604 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 85.0% | 0 |
| November 2024 | 29 | 29 | 93.1% | 0 |
| December 2024 | 31 | 31 | 87.1% | 0 |
| January 2025 | 27 | 27 | 96.3% | 0 |
| February 2025 | 22 | 22 | 86.4% | 0 |
| March 2025 | 26 | 26 | 76.9% | 0 |
| April 2025 | 26 | 26 | 96.2% | 0 |
| May 2025 | 30 | 30 | 73.3% | 0 |
| June 2025 | 30 | 30 | 70.0% | 0 |
| July 2025 | 31 | 31 | 80.7% | 0 |
| August 2025 | 31 | 31 | 80.7% | 0 |
| September 2025 | 30 | 30 | 90.0% | 0 |
| October 2025 | 31 | 31 | 77.4% | 0 |
| November 2025 | 24 | 23 | 82.6% | 1 |
| December 2025 | 21 | 21 | 81.0% | 0 |
| January 2026 | 26 | 26 | 88.5% | 0 |
| February 2026 | 22 | 22 | 77.3% | 0 |
| March 2026 | 27 | 26 | 80.8% | 1 |
| April 2026 | 28 | 28 | 85.7% | 0 |
| May 2026 | 31 | 31 | 74.2% | 0 |
| June 2026 | 30 | 30 | 80.0% | 0 |
| July 2026 | 31 | 31 | 64.5% | 0 |