NK321
NK321 (Spirit Airlines) is a multi-stop service on 4 routes, busiest Detroit to Fort Myers. Of 116 departures recorded from October 2024 to September 2025, 85.2% left on time, according to the US BTS.
- On-time departures85.2%of 116 flights
- Average delay7.6 min
- September 20252
- Cancelled0.9%
- Legs flown under this number4
Recorded departures by month
Short series — NK321 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 | – | 10 | – |
| February | – | 14 | – |
| March | – | 29 | – |
| April | – | 27 | – |
| May | – | 2 | – |
| June | – | – | – |
| July | – | – | – |
| August | – | 14 | – |
| September | – | 2 | – |
| October | 14 | – | – |
| November | 4 | – | – |
| December | – | – | – |
according to the US BTS · October 2024 → September 2025
On-time departures by month
Short series — NK321 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 | – | 90.0% | – |
| February | – | 57.1% | – |
| March | – | 85.7% | – |
| April | – | 88.9% | – |
| May | – | 50.0% | – |
| June | – | – | – |
| July | – | – | – |
| August | – | 85.7% | – |
| September | – | 100.0% | – |
| October | 100.0% | – | – |
| November | 100.0% | – | – |
| December | – | – | – |
according to the US BTS · October 2024 → September 2025
Average departure delay by month
Short series — NK321 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 → September 2025
Cancelled departures by month
Short series — NK321 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 | – | 0 | – |
| March | – | 1 | – |
| April | – | 0 | – |
| May | – | 0 | – |
| June | – | – | – |
| July | – | – | – |
| August | – | 0 | – |
| September | – | 0 | – |
| October | 0 | – | – |
| November | 0 | – | – |
| December | – | – | – |
according to the US BTS · October 2024 → September 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% 115
- Cancelled 0.9% 1
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Sep 3, 2025
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DTW RSW Detroit Metropolitan Wayne County Airport – Southwest Florida International Airport | 1,750 | 3.4 min | 85.5% | 56 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 14 | 14 | 100.0% | 0 |
| November 2024 | 4 | 4 | 100.0% | 0 |
| January 2025 | 10 | 10 | 90.0% | 0 |
| February 2025 | 14 | 14 | 57.1% | 0 |
| March 2025 | 29 | 28 | 85.7% | 1 |
| April 2025 | 27 | 27 | 88.9% | 0 |
| May 2025 | 2 | 2 | 50.0% | 0 |
| August 2025 | 14 | 14 | 85.7% | 0 |
| September 2025 | 2 | 2 | 100.0% | 0 |