DL1299
DL1299 (Delta Air Lines) is a multi-stop service on 4 routes, busiest Houston to Salt Lake City. Of 618 departures recorded from October 2024 to July 2026, 79.2% left on time, according to the US BTS.
- On-time departures79.2%of 618 flights
- Average delay14.5 min
- July 202662▲ 19.2%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 | 27 | 25 | ▼ 7.4% |
| February | 28 | 22 | ▼ 21.4% |
| March | 28 | 30 | ▲ 7.1% |
| April | 26 | 30 | ▲ 15.4% |
| May | 25 | 10 | ▼ 60.0% |
| June | 46 | 49 | ▲ 6.5% |
| July | 52 | 62 | ▲ 19.2% |
| August | 27 | – | – |
| September | 17 | – | – |
| October | 23 | – | in progress |
| November | 18 | – | – |
| December | 26 | – | – |
| Year to date (Jan–Jul) | 232 | 228 | ▼ 1.7% |
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 | 84.6% | 88.0% | ▲ 4.0% |
| February | 82.1% | 90.9% | ▲ 10.7% |
| March | 78.6% | 80.0% | ▲ 1.8% |
| April | 88.5% | 73.3% | ▼ 17.1% |
| May | 60.0% | 70.0% | ▲ 16.7% |
| June | 76.1% | 79.6% | ▲ 4.6% |
| July | 71.2% | 83.9% | ▲ 17.9% |
| August | 85.2% | – | – |
| September | 82.4% | – | – |
| October | 82.6% | – | in progress |
| November | 77.8% | – | – |
| December | 68.0% | – | – |
| Year-to-date average (Jan–Jul) | 77.3% | 80.8% | ▲ 4.6% |
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 | 1 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 1 | 0 | ▼ 100.0% |
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 99.7% 616
- Cancelled 0.3% 2
Share of all recorded flights in the period, all legs. · Oct 13, 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 |
|---|---|---|---|---|
| IAH SLC George Bush Intercontinental Airport – Salt Lake City International Airport | 1,923 | 16.9 min | 78.2% | 363 |
| SLC IAH Salt Lake City International Airport – George Bush Intercontinental Airport | 1,923 | 8.7 min | 82.1% | 195 |
| DTW MCI Detroit Metropolitan Wayne County Airport – Kansas City International Airport | 1,009 | -2.2 min | 92.1% | 38 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 11 | 11 | 81.8% | 0 |
| November 2024 | 16 | 16 | 100.0% | 0 |
| December 2024 | 20 | 20 | 65.0% | 0 |
| January 2025 | 27 | 26 | 84.6% | 1 |
| February 2025 | 28 | 28 | 82.1% | 0 |
| March 2025 | 28 | 28 | 78.6% | 0 |
| April 2025 | 26 | 26 | 88.5% | 0 |
| May 2025 | 25 | 25 | 60.0% | 0 |
| June 2025 | 46 | 46 | 76.1% | 0 |
| July 2025 | 52 | 52 | 71.2% | 0 |
| August 2025 | 27 | 27 | 85.2% | 0 |
| September 2025 | 17 | 17 | 82.4% | 0 |
| October 2025 | 23 | 23 | 82.6% | 0 |
| November 2025 | 18 | 18 | 77.8% | 0 |
| December 2025 | 26 | 25 | 68.0% | 1 |
| January 2026 | 25 | 25 | 88.0% | 0 |
| February 2026 | 22 | 22 | 90.9% | 0 |
| March 2026 | 30 | 30 | 80.0% | 0 |
| April 2026 | 30 | 30 | 73.3% | 0 |
| May 2026 | 10 | 10 | 70.0% | 0 |
| June 2026 | 49 | 49 | 79.6% | 0 |
| July 2026 | 62 | 62 | 83.9% | 0 |