Flight Reliability
NK 1256 · Spirit Airlines
Houston → Newark (IAH–EWR)89% of its flights flew this route. The rest (SDF–DTW) are included in these numbers.
21
Bring Snacks
WanderNerd Reliability Score
- 72%
- Arrive within 15 minutes
- 15 min
- Average arrival delay
- 14.1%
- Cancelled
- 5 min early
- Median arrival delay
Based on 92 historical flights. Data through May 2026.
What the data says
The 12–3 PM departure wins.
NK 1256 departing between 12–3 PM arrived on time 80% of the time, versus 71% between 6–9 AM.
Sunday scaries are real for this one.
NK 1256 arrived on time 84% of the time on Fridays and just 60% on Sundays. That gap is worth planning around.
The breakdown
- Mon81%(16 flights)
- Tue—(7 flights)
- Wed—(7 flights)
- Thu75%(12 flights)
- Fri84%(19 flights)
- Sat—(8 flights)
- Sun60%(10 flights)
- 6–9 AM71%(69 flights)
- 12–3 PM80%(10 flights)
64%
Apr
Jan 92% → Apr 64% on time
| Month | On-time percentage | Flights |
|---|---|---|
| January 2026 | 92% | 12 |
| February 2026 | 61% | 18 |
| March 2026 | 71% | 28 |
| April 2026 | 64% | 11 |
- Departures on time
- 72%
- Diverted
- 0%
- Flights flown
- 79
- Months covered
- 6
Same route, other flights
Keep nerding
Based on 92 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.