Flight OddsNK421 IAH → DTW
Spirit Airlines · Houston, TX to Detroit, MI · 31 flights observed, 2025-11-02 to 2025-12-03 · 1,075 mi
On-time arrival
73%
Median delay
+1 min
90th percentile
+37 min
Cancellation rate
3%
How often is NK421 on time?
Across 31 flights on IAH → DTW from 2025-11-02 to 2025-12-03, NK421 arrived within 15 minutes of schedule 73% of the time. The median arrival delay was +1 min, and the worst 10% of flights arrived +37 min or later. 3% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 22 | 73% |
| 16-30 min | 3 | 10% |
| 31-60 min | 4 | 13% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 1 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-11 | 27 | 70% | +11 min |
| 2025-12 | 3 | 100% | -6 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 80% |
| Tue | 5 | 60% |
| Wed | 5 | 100% |
| Thu | 4 | 100% |
| Fri | 3 | 100% |
| Sat | 4 | 0% |
| Sun | 4 | 75% |
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…