NK637
NK637 (Spirit Airlines) is a multi-stop service on 3 routes, busiest Tampa to Pittsburgh. Of 80 departures recorded from November 2024 to May 2025, 87.3% left on time, according to the US BTS.
- On-time departures87.3%of 80 flights
- Average delay10.4 min
- May 20254
- Cancelled1.3%
- Legs flown under this number3
Recorded departures by month
Short series — NK637 has only 6 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 periods6 periods
| Period | Departures 2024 | Departures 2025 | Change vs last year |
|---|---|---|---|
| January | – | 7 | – |
| February | – | – | – |
| March | – | 22 | – |
| April | – | 20 | – |
| May | – | 4 | – |
| June | – | – | – |
| July | – | – | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | – |
| November | 4 | – | – |
| December | 23 | – | – |
according to the US BTS · November 2024 → May 2025
On-time departures by month
Short series — NK637 has only 6 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 periods6 periods
| Period | On time 2024 | On time 2025 | Change vs last year |
|---|---|---|---|
| January | – | 100.0% | – |
| February | – | – | – |
| March | – | 85.7% | – |
| April | – | 80.0% | – |
| May | – | 100.0% | – |
| June | – | – | – |
| July | – | – | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | – |
| November | 100.0% | – | – |
| December | 87.0% | – | – |
according to the US BTS · November 2024 → May 2025
Average departure delay by month
Short series — NK637 has only 6 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 · November 2024 → May 2025
Cancelled departures by month
Short series — NK637 has only 6 months so far. Enough to show the level now, not enough to read a trend.
Months without data are left blank.
The most recent periods6 periods
| Period | Cancelled 2024 | Cancelled 2025 | Change vs last year |
|---|---|---|---|
| January | – | 0 | – |
| February | – | – | – |
| March | – | 1 | – |
| April | – | 0 | – |
| May | – | 0 | – |
| June | – | – | – |
| July | – | – | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | – |
| November | 0 | – | – |
| December | 0 | – | – |
according to the US BTS · November 2024 → May 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 98.8% 79
- Cancelled 1.3% 1
Share of all recorded flights in the period, all legs. · Nov 8, 2024 → May 5, 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 |
|---|---|---|---|---|
| TPA PIT Tampa International Airport – Pittsburgh International Airport | 1,408 | 15.9 min | 84.4% | 46 |
| FLL PIT Fort Lauderdale Hollywood International Airport – Pittsburgh International Airport | 1,603 | 3.7 min | 90.0% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| November 2024 | 4 | 4 | 100.0% | 0 |
| December 2024 | 23 | 23 | 87.0% | 0 |
| January 2025 | 7 | 7 | 100.0% | 0 |
| March 2025 | 22 | 21 | 85.7% | 1 |
| April 2025 | 20 | 20 | 80.0% | 0 |
| May 2025 | 4 | 4 | 100.0% | 0 |