Flight Reliability
F9 4374 · Frontier Airlines
Denver → Pittsburgh (DEN–PIT)
94
Nerd Approved
WanderNerd Reliability Score
- 86%
- Arrive within 15 minutes
- 5 min
- Average arrival delay
- 0%
- Cancelled
- 10 min early
- Median arrival delay
Based on 58 historical flights. Data through May 2026.
What the data says
Monday is the weak spot.
F9 4374 arrived on time 89% of the time on Fridays. On Mondays: 79%.
Better than the DEN–PIT route average.
F9 4374 arrived on time 86% of the time, versus 73% across the DEN–PIT route.
Better than the Frontier Airlines network average.
F9 4374 arrived on time 86% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon79%(24 flights)
- Tue—(1 flights)
- Wed—(0 flights)
- Thu—(0 flights)
- Fri89%(26 flights)
- Sat—(2 flights)
- Sun—(5 flights)
- 9 AM–12 PM84%(50 flights)
- 12–3 PM—(8 flights)
- Departures on time
- 86%
- Diverted
- 0%
- Flights flown
- 58
- Months covered
- 9
Same route, other flights
Keep nerding
Based on 58 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.