Flight Reliability
F9 3229 · Frontier Airlines
Houston → Denver (IAH–DEN)
95
Nerd Approved
WanderNerd Reliability Score
- 88%
- Arrive within 15 minutes
- 4 min
- Average arrival delay
- 0.3%
- Cancelled
- 11 min early
- Median arrival delay
Based on 356 historical flights. Data through May 2026.
What the data says
Mondays have been rough.
F9 3229 arrived on time 98% of the time on Fridays and just 79% on Mondays. That gap is worth planning around.
A bit ahead of the IAH–DEN route.
F9 3229 arrived on time 88% of the time, versus 82% across the IAH–DEN route.
Better than the Frontier Airlines network average.
F9 3229 arrived on time 88% of the time, versus 73% across the Frontier Airlines network.
It basically never cancels.
Out of 356 scheduled flights, only 0.3% were cancelled.
The breakdown
- Mon79%(52 flights)
- Tue82%(49 flights)
- Wed90%(49 flights)
- Thu92%(52 flights)
- Fri98%(52 flights)
- Sat88%(49 flights)
- Sun87%(52 flights)
90%
May
Jun 83% → May 90% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 83% | 30 |
| July 2025 | 94% | 31 |
| August 2025 | 90% | 31 |
| September 2025 | 87% | 30 |
| October 2025 | 94% | 31 |
| November 2025 | 80% | 30 |
| December 2025 | 84% | 31 |
| January 2026 | 92% | 24 |
| February 2026 | 80% | 25 |
| March 2026 | 90% | 31 |
| April 2026 | 90% | 30 |
| May 2026 | 90% | 31 |
- Departures on time
- 89%
- Diverted
- 0%
- Flights flown
- 355
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 356 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.