Flight Reliability
F9 2105 · Frontier Airlines
Denver → Phoenix (DEN–PHX)
86
Pretty Reliable
WanderNerd Reliability Score
- 84%
- Arrive within 15 minutes
- 3 min
- Average arrival delay
- 0.5%
- Cancelled
- 9 min early
- Median arrival delay
Based on 204 historical flights. Data through May 2026.
What the data says
Morning flights do better here.
F9 2105 departing between 9 AM–12 PM arrived on time 100% of the time, versus 80% between 3–6 PM.
Sunday scaries are real for this one.
F9 2105 arrived on time 90% of the time on Saturdays. On Sundays: 79%.
Better than the DEN–PHX route average.
F9 2105 arrived on time 84% of the time, versus 76% across the DEN–PHX route.
Better than the Frontier Airlines network average.
F9 2105 arrived on time 84% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon82%(28 flights)
- Tue88%(25 flights)
- Wed84%(25 flights)
- Thu85%(33 flights)
- Fri81%(26 flights)
- Sat90%(31 flights)
- Sun79%(33 flights)
- 9 AM–12 PM100%(13 flights)
- 12–3 PM88%(84 flights)
- 3–6 PM80%(98 flights)
- 6–9 PM—(6 flights)
100%
Apr
Sep 75% → Apr 100% on time
| Month | On-time percentage | Flights |
|---|---|---|
| September 2025 | 75% | 20 |
| October 2025 | 90% | 29 |
| November 2025 | 72% | 25 |
| December 2025 | 90% | 30 |
| January 2026 | 81% | 21 |
| February 2026 | 88% | 25 |
| March 2026 | 82% | 28 |
| April 2026 | 100% | 13 |
- Departures on time
- 82%
- Diverted
- 1.0%
- Flights flown
- 201
- Months covered
- 10
Same route, other flights
Keep nerding
Based on 204 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.