Flight Reliability
F9 4765 · Frontier Airlines
Denver → Phoenix (DEN–PHX)
74
Usually Fine
WanderNerd Reliability Score
- 71%
- Arrive within 15 minutes
- 20 min
- Average arrival delay
- 0%
- Cancelled
- 3 min early
- Median arrival delay
Based on 238 historical flights. Data through May 2026.
What the data says
Wednesdays have been rough.
F9 4765 arrived on time 91% of the time on Tuesdays and just 57% on Wednesdays. That gap is worth planning around.
A bit behind the DEN–PHX route.
F9 4765 arrived on time 71% of the time, versus 76% across the DEN–PHX route.
It basically never cancels.
Out of 238 scheduled flights, only 0.0% were cancelled.
Recent months have been rougher.
F9 4765 arrived on time 67% of the time over the last three months in the data, compared with 86% in the three months before that.
The breakdown
- Mon70%(46 flights)
- Tue91%(11 flights)
- Wed57%(14 flights)
- Thu66%(41 flights)
- Fri65%(46 flights)
- Sat84%(31 flights)
- Sun76%(49 flights)
- 3–6 PM74%(23 flights)
- 6–9 PM71%(206 flights)
- 9 PM–12 AM—(9 flights)
65%
May
Jun 57% → May 65% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 57% | 23 |
| July 2025 | 85% | 20 |
| August 2025 | 63% | 19 |
| September 2025 | 65% | 17 |
| October 2025 | 61% | 18 |
| November 2025 | 78% | 27 |
| December 2025 | 80% | 25 |
| January 2026 | 88% | 16 |
| February 2026 | 92% | 12 |
| March 2026 | 46% | 22 |
| April 2026 | 90% | 19 |
| May 2026 | 65% | 20 |
- Departures on time
- 69%
- Diverted
- 0%
- Flights flown
- 238
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 238 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.