Flight Reliability
NK 2020 · Spirit Airlines
Houston → Detroit (IAH–DTW)84% of its flights flew this route. The rest (LAS–SAN) are included in these numbers.
- 70%
- Arrive within 15 minutes
- 18 min
- Average arrival delay
- 8.6%
- Cancelled
- 2 min early
- Median arrival delay
Based on 70 historical flights. Data through May 2026.
What the data says
6–9 PM has a slight edge.
Departures between 6–9 PM arrived on time 74% of the time, against 70% between 6–9 AM.
Thursdays have been rough.
NK 2020 arrived on time 91% of the time on Saturdays and just 30% on Thursdays. That gap is worth planning around.
Lagging the IAH–DTW route.
NK 2020 arrived on time 70% of the time, versus 81% across the IAH–DTW route.
A bit behind the Spirit Airlines network.
NK 2020 arrived on time 70% of the time, versus 74% across the Spirit Airlines network.
The breakdown
- Mon—(6 flights)
- Tue—(7 flights)
- Wed64%(11 flights)
- Thu30%(10 flights)
- Fri—(9 flights)
- Sat91%(11 flights)
- Sun90%(10 flights)
- 6–9 AM70%(20 flights)
- 12–3 PM—(1 flights)
- 3–6 PM—(8 flights)
- 6–9 PM74%(35 flights)
Jun 64% → Apr 54% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 64% | 11 |
| January 2026 | 82% | 17 |
| March 2026 | 75% | 16 |
| April 2026 | 54% | 13 |
- Departures on time
- 69%
- Diverted
- 0%
- Flights flown
- 64
- Months covered
- 5
Same route, other flights
Keep nerding
Based on 70 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.