NK1237
NK1237 (Spirit Airlines) is a multi-stop service on 4 routes, busiest Las Vegas to Detroit. Of 110 departures recorded from October 2024 to August 2025, 73.4% left on time, according to the US BTS.
- On-time departures73.4%of 110 flights
- Average delay17.6 min
- August 20254
- Cancelled0.9%
- Legs flown under this number4
Recorded departures by month
Short series — NK1237 has only 9 months so far. Enough to show the level now, not enough to read a trend.
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods9 periods
| Period | Departures 2024 | Departures 2025 | Change vs last year |
|---|---|---|---|
| January | – | 8 | – |
| February | – | – | – |
| March | – | 26 | – |
| April | – | 30 | – |
| May | – | 6 | – |
| June | – | – | – |
| July | – | 6 | – |
| August | – | 4 | – |
| September | – | – | – |
| October | 5 | – | – |
| November | 10 | – | – |
| December | 15 | – | – |
according to the US BTS · October 2024 → August 2025
On-time departures by month
Short series — NK1237 has only 9 months so far. Enough to show the level now, not enough to read a trend.
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 periods9 periods
| Period | On time 2024 | On time 2025 | Change vs last year |
|---|---|---|---|
| January | – | 50.0% | – |
| February | – | – | – |
| March | – | 69.2% | – |
| April | – | 93.3% | – |
| May | – | 100.0% | – |
| June | – | – | – |
| July | – | 83.3% | – |
| August | – | 50.0% | – |
| September | – | – | – |
| October | 80.0% | – | – |
| November | 80.0% | – | – |
| December | 35.7% | – | – |
according to the US BTS · October 2024 → August 2025
Average departure delay by month
Short series — NK1237 has only 9 months so far. Enough to show the level now, not enough to read a trend.
Months without data are left blank.
according to the US BTS · October 2024 → August 2025
Cancelled departures by month
Short series — NK1237 has only 9 months so far. Enough to show the level now, not enough to read a trend.
Months without data are left blank.
The most recent periods9 periods
| Period | Cancelled 2024 | Cancelled 2025 | Change vs last year |
|---|---|---|---|
| January | – | 0 | – |
| February | – | – | – |
| March | – | 0 | – |
| April | – | 0 | – |
| May | – | 0 | – |
| June | – | – | – |
| July | – | 0 | – |
| August | – | 0 | – |
| September | – | – | – |
| October | 0 | – | – |
| November | 0 | – | – |
| December | 1 | – | – |
according to the US BTS · October 2024 → August 2025
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 99.1% 109
- Cancelled 0.9% 1
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Aug 11, 2025
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| LAS DTW Harry Reid International Airport – Detroit Metropolitan Wayne County Airport | 2,808 | 12.0 min | 83.9% | 62 |
| DTW RSW Detroit Metropolitan Wayne County Airport – Southwest Florida International Airport | 1,750 | 27.9 min | 51.6% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 5 | 5 | 80.0% | 0 |
| November 2024 | 10 | 10 | 80.0% | 0 |
| December 2024 | 15 | 14 | 35.7% | 1 |
| January 2025 | 8 | 8 | 50.0% | 0 |
| March 2025 | 26 | 26 | 69.2% | 0 |
| April 2025 | 30 | 30 | 93.3% | 0 |
| May 2025 | 6 | 6 | 100.0% | 0 |
| July 2025 | 6 | 6 | 83.3% | 0 |
| August 2025 | 4 | 4 | 50.0% | 0 |