NK921
NK921 (Spirit Airlines) is a multi-stop service on 6 routes, busiest Houston to Orlando. Of 233 departures recorded from November 2024 to April 2026, 68.6% left on time, according to the US BTS.
- On-time departures68.6%of 233 flights
- Average delay19.4 min
- April 202613▼ 35.0%vs April 2025
- Cancelled3.0%
- Legs flown under this number6
Recorded departures by month
Short series — NK921 has only 11 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 periods10 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 23 | 25 | ▲ 8.7% |
| February | 28 | 17 | ▼ 39.3% |
| March | 30 | 31 | ▲ 3.3% |
| April | 20 | 13 | ▼ 35.0% |
| May | 4 | – | – |
| June | – | – | – |
| July | – | – | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | 28 | – | – |
| Year to date (Jan–Apr) | 101 | 86 | ▼ 14.9% |
according to the US BTS · November 2024 → April 2026
On-time departures by month
Short series — NK921 has only 11 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 periods10 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 63.6% | 64.0% | ▲ 0.6% |
| February | 75.0% | 70.6% | ▼ 5.9% |
| March | 63.3% | 62.1% | ▼ 2.0% |
| April | 85.0% | 69.2% | ▼ 18.6% |
| May | 75.0% | – | – |
| June | – | – | – |
| July | – | – | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | 60.0% | – | – |
| Year-to-date average (Jan–Apr) | 71.7% | 66.5% | ▼ 7.3% |
according to the US BTS · November 2024 → April 2026
Average departure delay by month
Short series — NK921 has only 11 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 → April 2026
Cancelled departures by month
Short series — NK921 has only 11 months so far. Enough to show the level now, not enough to read a trend.
Months without data are left blank.
The most recent periods10 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 2 | – |
| April | 0 | 0 | – |
| May | 0 | – | – |
| June | – | – | – |
| July | – | – | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | 3 | – | – |
| Year to date (Jan–Apr) | 1 | 2 | ▲ 100.0% |
according to the US BTS · November 2024 → April 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 97.0% 226
- Cancelled 3.0% 7
Share of all recorded flights in the period, all legs. · Nov 7, 2024 → Apr 14, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| IAH MCO George Bush Intercontinental Airport – Orlando International Airport | 1,372 | 13.3 min | 69.2% | 80 |
| DFW DTW Dallas Fort Worth International Airport – Detroit Metropolitan Wayne County Airport | 1,587 | 22.3 min | 71.7% | 54 |
| FLL PIT Fort Lauderdale Hollywood International Airport – Pittsburgh International Airport | 1,603 | 21.5 min | 70.6% | 51 |
| LGA ORD LaGuardia Airport – Chicago O'Hare International Airport | 1,177 | 35.6 min | 50.0% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| November 2024 | 14 | 13 | 84.6% | 1 |
| January 2025 | 23 | 22 | 63.6% | 1 |
| February 2025 | 28 | 28 | 75.0% | 0 |
| March 2025 | 30 | 30 | 63.3% | 0 |
| April 2025 | 20 | 20 | 85.0% | 0 |
| May 2025 | 4 | 4 | 75.0% | 0 |
| December 2025 | 28 | 25 | 60.0% | 3 |
| January 2026 | 25 | 25 | 64.0% | 0 |
| February 2026 | 17 | 17 | 70.6% | 0 |
| March 2026 | 31 | 29 | 62.1% | 2 |
| April 2026 | 13 | 13 | 69.2% | 0 |