Flight Reliability
F9 1609 · Frontier Airlines
Milwaukee → Denver (MKE–DEN)
76
Usually Fine
WanderNerd Reliability Score
- 71%
- Arrive within 15 minutes
- 15 min
- Average arrival delay
- 0%
- Cancelled
- 9 min early
- Median arrival delay
Based on 69 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
F9 1609 arrived on time 80% of the time on Mondays and just 60% on Fridays. That gap is worth planning around.
Lagging the MKE–DEN route.
F9 1609 arrived on time 71% of the time, versus 79% across the MKE–DEN route.
The breakdown
- Mon80%(30 flights)
- Tue—(1 flights)
- Wed—(0 flights)
- Thu—(0 flights)
- Fri60%(30 flights)
- Sat—(2 flights)
- Sun—(6 flights)
- 3–6 PM—(6 flights)
- 6–9 PM68%(63 flights)
80%
Oct
Aug 55% → Oct 80% on time
| Month | On-time percentage | Flights |
|---|---|---|
| August 2025 | 55% | 11 |
| September 2025 | 73% | 11 |
| October 2025 | 80% | 10 |
- Departures on time
- 74%
- Diverted
- 0%
- Flights flown
- 69
- Months covered
- 8
Same route, other flights
Keep nerding
Based on 69 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.