DL1553
DL1553 (Delta Air Lines) is a multi-stop service on 3 routes, busiest Salt Lake City to Denver. Of 1,054 departures recorded from October 2024 to July 2026, 82.9% left on time, according to the US BTS.
- On-time departures82.9%of 1,054 flights
- Average delay6.4 min
- July 202660▼ 3.2%vs July 2025
- Cancelled0.6%
- 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 | 35 | 62 | ▲ 77.1% |
| February | 40 | 56 | ▲ 40.0% |
| March | 35 | 35 | 0.0% |
| April | 30 | 46 | ▲ 53.3% |
| May | 56 | 62 | ▲ 10.7% |
| June | 60 | 60 | 0.0% |
| July | 62 | 60 | ▼ 3.2% |
| August | 62 | – | – |
| September | 60 | – | – |
| October | 34 | – | in progress |
| November | 29 | – | – |
| December | 42 | – | – |
| Year to date (Jan–Jul) | 318 | 381 | ▲ 19.8% |
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 | 71.4% | 82.3% | ▲ 15.2% |
| February | 95.0% | 79.3% | ▼ 16.6% |
| March | 88.6% | 93.9% | ▲ 6.1% |
| April | 83.3% | 89.1% | ▲ 7.0% |
| May | 75.0% | 88.7% | ▲ 18.3% |
| June | 78.3% | 69.5% | ▼ 11.3% |
| July | 71.0% | 85.0% | ▲ 19.8% |
| August | 95.2% | – | – |
| September | 81.7% | – | – |
| October | 76.5% | – | in progress |
| November | 96.6% | – | – |
| December | 88.1% | – | – |
| Year-to-date average (Jan–Jul) | 80.4% | 84.0% | ▲ 4.5% |
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 | 0 | – |
| February | 0 | 3 | – |
| March | 0 | 2 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 6 |
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 99.4% 1,048
- Cancelled 0.6% 6
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 |
|---|---|---|---|---|
| SLC DEN Salt Lake City International Airport – Denver International Airport | 628 | 6.0 min | 83.9% | 603 |
| DEN SLC Denver International Airport – Salt Lake City International Airport | 628 | 6.9 min | 81.1% | 420 |
| MSP MEM Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field – Frederick W. Smith International Airport | 1,128 | 8.4 min | 89.7% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 16 | 16 | 81.3% | 0 |
| November 2024 | 50 | 50 | 78.0% | 0 |
| December 2024 | 62 | 62 | 87.1% | 0 |
| January 2025 | 35 | 35 | 71.4% | 0 |
| February 2025 | 40 | 40 | 95.0% | 0 |
| March 2025 | 35 | 35 | 88.6% | 0 |
| April 2025 | 30 | 30 | 83.3% | 0 |
| May 2025 | 56 | 56 | 75.0% | 0 |
| June 2025 | 60 | 60 | 78.3% | 0 |
| July 2025 | 62 | 62 | 71.0% | 0 |
| August 2025 | 62 | 62 | 95.2% | 0 |
| September 2025 | 60 | 60 | 81.7% | 0 |
| October 2025 | 34 | 34 | 76.5% | 0 |
| November 2025 | 29 | 29 | 96.6% | 0 |
| December 2025 | 42 | 42 | 88.1% | 0 |
| January 2026 | 62 | 62 | 82.3% | 0 |
| February 2026 | 56 | 53 | 79.3% | 3 |
| March 2026 | 35 | 33 | 93.9% | 2 |
| April 2026 | 46 | 46 | 89.1% | 0 |
| May 2026 | 62 | 62 | 88.7% | 0 |
| June 2026 | 60 | 59 | 69.5% | 1 |
| July 2026 | 60 | 60 | 85.0% | 0 |