Flight Reliability
F9 1678 · Frontier Airlines
Denver → Des Moines (DEN–DSM)
87
Pretty Reliable
WanderNerd Reliability Score
- 79%
- Arrive within 15 minutes
- 3 min
- Average arrival delay
- 0%
- Cancelled
- 9 min early
- Median arrival delay
Based on 149 historical flights. Data through May 2026.
What the data says
Morning flights do better here.
F9 1678 departing between 9 AM–12 PM arrived on time 91% of the time, versus 68% between 3–6 PM.
Thursday is the weak spot.
F9 1678 arrived on time 83% of the time on Sundays. On Thursdays: 71%.
A bit ahead of the Frontier Airlines network.
F9 1678 arrived on time 79% of the time, versus 73% across the Frontier Airlines network.
It basically never cancels.
Out of 149 scheduled flights, only 0.0% were cancelled.
The breakdown
- Mon72%(47 flights)
- Tue—(3 flights)
- Wed—(8 flights)
- Thu71%(17 flights)
- Fri82%(49 flights)
- Sat—(7 flights)
- Sun83%(18 flights)
- 9 AM–12 PM91%(69 flights)
- 12–3 PM—(2 flights)
- 3–6 PM68%(78 flights)
100%
May
Aug 85% → May 100% on time
| Month | On-time percentage | Flights |
|---|---|---|
| August 2025 | 85% | 13 |
| September 2025 | 82% | 17 |
| October 2025 | 91% | 21 |
| November 2025 | 88% | 16 |
| December 2025 | 75% | 12 |
| February 2026 | 40% | 10 |
| March 2026 | 83% | 18 |
| May 2026 | 100% | 10 |
- Departures on time
- 79%
- Diverted
- 0%
- Flights flown
- 149
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 149 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.