DL3172
DL3172 (Delta Air Lines) is a multi-stop service on 6 routes, busiest Salt Lake City to Denver. Of 430 departures recorded from January 2025 to July 2026, 88.1% left on time, according to the US BTS.
- On-time departures88.1%of 430 flights
- Average delay1.4 min
- July 202662▲ 100.0%vs July 2025
- Cancelled0.2%
- Legs flown under this number6
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods14 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 22 | – | – |
| February | 44 | – | – |
| March | 12 | – | – |
| April | 9 | – | – |
| May | 31 | – | – |
| June | 30 | 48 | ▲ 60.0% |
| July | 31 | 62 | ▲ 100.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 19 | – | – |
according to the US BTS · January 2025 → July 2026
On-time departures by month
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods14 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 81.0% | – | – |
| February | 68.2% | – | – |
| March | 91.7% | – | – |
| April | 100.0% | – | – |
| May | 96.8% | – | – |
| June | 86.7% | 91.7% | ▲ 5.8% |
| July | 83.9% | 93.6% | ▲ 11.5% |
| August | 96.8% | – | – |
| September | 100.0% | – | – |
| October | 83.9% | – | in progress |
| November | 86.7% | – | – |
| December | 79.0% | – | – |
according to the US BTS · January 2025 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · January 2025 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods14 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | – | – |
| February | 0 | – | – |
| March | 0 | – | – |
| April | 0 | – | – |
| May | 0 | – | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
according to the US BTS · January 2025 → 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 99.8% 429
- Cancelled 0.2% 1
Share of all recorded flights in the period, all legs. · Jan 20, 2025 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SLC DEN Salt Lake City International Airport – Denver International Airport | 628 | 1.5 min | 88.7% | 195 |
| SLC ONT Salt Lake City International Airport – Ontario International Airport | 898 | -1.4 min | 96.4% | 55 |
| ONT SLC Ontario International Airport – Salt Lake City International Airport | 898 | -1.5 min | 89.1% | 55 |
| SDF ATL Louisville Muhammad Ali International Airport – Hartsfield Jackson Atlanta International Airport | 518 | -5.7 min | 95.7% | 47 |
| MDT ATL Harrisburg International Airport – Hartsfield Jackson Atlanta International Airport | 997 | 8.8 min | 79.0% | 39 |
| ATL MDT Hartsfield Jackson Atlanta International Airport – Harrisburg International Airport | 997 | 10.6 min | 71.8% | 39 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| January 2025 | 22 | 21 | 81.0% | 1 |
| February 2025 | 44 | 44 | 68.2% | 0 |
| March 2025 | 12 | 12 | 91.7% | 0 |
| April 2025 | 9 | 9 | 100.0% | 0 |
| May 2025 | 31 | 31 | 96.8% | 0 |
| June 2025 | 30 | 30 | 86.7% | 0 |
| July 2025 | 31 | 31 | 83.9% | 0 |
| August 2025 | 31 | 31 | 96.8% | 0 |
| September 2025 | 30 | 30 | 100.0% | 0 |
| October 2025 | 31 | 31 | 83.9% | 0 |
| November 2025 | 30 | 30 | 86.7% | 0 |
| December 2025 | 19 | 19 | 79.0% | 0 |
| June 2026 | 48 | 48 | 91.7% | 0 |
| July 2026 | 62 | 62 | 93.6% | 0 |