DL1559
DL1559 (Delta Air Lines) is a multi-stop service on 4 routes, busiest Los Angeles to San Francisco. Of 1,094 departures recorded from October 2024 to July 2026, 76.4% left on time, according to the US BTS.
- On-time departures76.4%of 1,094 flights
- Average delay13.8 min
- July 202657▼ 5.0%vs July 2025
- Cancelled0.7%
- 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 | 62 | 48 | ▼ 22.6% |
| February | 56 | 55 | ▼ 1.8% |
| March | 62 | 62 | 0.0% |
| April | 60 | 60 | 0.0% |
| May | 37 | 57 | ▲ 54.1% |
| June | 53 | 56 | ▲ 5.7% |
| July | 60 | 57 | ▼ 5.0% |
| August | 41 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 43 | – | – |
| Year to date (Jan–Jul) | 390 | 395 | ▲ 1.3% |
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 | 82.3% | 95.8% | ▲ 16.5% |
| February | 65.5% | 69.1% | ▲ 5.6% |
| March | 69.4% | 88.3% | ▲ 27.4% |
| April | 83.3% | 58.3% | ▼ 30.0% |
| May | 89.2% | 62.3% | ▼ 30.2% |
| June | 73.6% | 69.6% | ▼ 5.4% |
| July | 81.4% | 63.2% | ▼ 22.4% |
| August | 80.5% | – | – |
| September | 83.3% | – | – |
| October | 71.0% | – | in progress |
| November | 80.0% | – | – |
| December | 69.8% | – | – |
| Year-to-date average (Jan–Jul) | 77.8% | 72.4% | ▼ 7.0% |
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 | 1 | 0 | ▼ 100.0% |
| March | 0 | 2 | – |
| April | 0 | 0 | – |
| May | 0 | 4 | – |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| 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 99.3% 1,086
- Cancelled 0.7% 8
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
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| LAX SFO Los Angeles International Airport – San Francisco International Airport | 543 | 11.1 min | 77.4% | 618 |
| SFO LAX San Francisco International Airport – Los Angeles International Airport | 543 | 19.0 min | 73.5% | 408 |
| RSW DTW Southwest Florida International Airport – Detroit Metropolitan Wayne County Airport | 1,750 | 9.5 min | 88.2% | 34 |
| DTW RSW Detroit Metropolitan Wayne County Airport – Southwest Florida International Airport | 1,750 | 4.8 min | 82.4% | 34 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 32 | 32 | 84.4% | 0 |
| November 2024 | 44 | 44 | 77.3% | 0 |
| December 2024 | 58 | 58 | 94.8% | 0 |
| January 2025 | 62 | 62 | 82.3% | 0 |
| February 2025 | 56 | 55 | 65.5% | 1 |
| March 2025 | 62 | 62 | 69.4% | 0 |
| April 2025 | 60 | 60 | 83.3% | 0 |
| May 2025 | 37 | 37 | 89.2% | 0 |
| June 2025 | 53 | 53 | 73.6% | 0 |
| July 2025 | 60 | 59 | 81.4% | 1 |
| August 2025 | 41 | 41 | 80.5% | 0 |
| September 2025 | 30 | 30 | 83.3% | 0 |
| October 2025 | 31 | 31 | 71.0% | 0 |
| November 2025 | 30 | 30 | 80.0% | 0 |
| December 2025 | 43 | 43 | 69.8% | 0 |
| January 2026 | 48 | 48 | 95.8% | 0 |
| February 2026 | 55 | 55 | 69.1% | 0 |
| March 2026 | 62 | 60 | 88.3% | 2 |
| April 2026 | 60 | 60 | 58.3% | 0 |
| May 2026 | 57 | 53 | 62.3% | 4 |
| June 2026 | 56 | 56 | 69.6% | 0 |
| July 2026 | 57 | 57 | 63.2% | 0 |