NK1604
NK1604 (Spirit Airlines) is a multi-stop service on 3 routes, busiest Fort Myers to Chicago. Of 123 departures recorded from July 2025 to May 2026, 80.5% left on time, according to the US BTS.
- On-time departures80.5%of 123 flights
- Average delay7.5 min
- May 20261
- Cancelled4.1%
- Legs flown under this number3
Recorded departures by month
Short series — NK1604 has only 7 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 periods7 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | 23 | – |
| February | – | 28 | – |
| March | – | 31 | – |
| April | – | 30 | – |
| May | – | 1 | – |
| June | – | – | – |
| July | 6 | – | – |
| August | 4 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | – | – | – |
according to the US BTS · July 2025 → May 2026
On-time departures by month
Short series — NK1604 has only 7 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 periods7 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | – | 90.9% | – |
| February | – | 80.0% | – |
| March | – | 83.3% | – |
| April | – | 93.3% | – |
| May | – | 100.0% | – |
| June | – | – | – |
| July | 0.0% | – | – |
| August | 25.0% | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | – | – | – |
according to the US BTS · July 2025 → May 2026
Average departure delay by month
Short series — NK1604 has only 7 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 · July 2025 → May 2026
Cancelled departures by month
Short series — NK1604 has only 7 months so far. Enough to show the level now, not enough to read a trend.
Months without data are left blank.
The most recent periods7 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | – | 1 | – |
| February | – | 3 | – |
| March | – | 1 | – |
| April | – | 0 | – |
| May | – | 0 | – |
| June | – | – | – |
| July | 0 | – | – |
| August | 0 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | – | – | – |
according to the US BTS · July 2025 → May 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 95.9% 118
- Cancelled 4.1% 5
Share of all recorded flights in the period, all legs. · Jul 11, 2025 → May 1, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| RSW ORD Southwest Florida International Airport – Chicago O'Hare International Airport | 1,807 | 5.6 min | 84.6% | 96 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| July 2025 | 6 | 6 | 0.0% | 0 |
| August 2025 | 4 | 4 | 25.0% | 0 |
| January 2026 | 23 | 22 | 90.9% | 1 |
| February 2026 | 28 | 25 | 80.0% | 3 |
| March 2026 | 31 | 30 | 83.3% | 1 |
| April 2026 | 30 | 30 | 93.3% | 0 |
| May 2026 | 1 | 1 | 100.0% | 0 |