Flight Reliability
F9 1599 · Frontier Airlines
New York → Denver (JFK–DEN)
61
A Little Dicey
WanderNerd Reliability Score
- 67%
- Arrive within 15 minutes
- 38 min
- Average arrival delay
- 0%
- Cancelled
- 3 min
- Median arrival delay
Based on 49 historical flights. Data through May 2026.
What the data says
The 12–3 PM departure wins.
F9 1599 departing between 12–3 PM arrived on time 90% of the time, versus 53% between 3–6 PM.
Mondays have been rough.
F9 1599 arrived on time 75% of the time on Wednesdays and just 55% on Mondays. That gap is worth planning around.
A bit behind the JFK–DEN route.
F9 1599 arrived on time 67% of the time, versus 71% across the JFK–DEN route.
A bit behind the Frontier Airlines network.
F9 1599 arrived on time 67% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon55%(11 flights)
- Tue—(3 flights)
- Wed75%(12 flights)
- Thu—(4 flights)
- Fri64%(11 flights)
- Sat—(4 flights)
- Sun—(4 flights)
- 12–3 PM90%(19 flights)
- 3–6 PM53%(30 flights)
60%
Dec
Oct 82% → Dec 60% on time
| Month | On-time percentage | Flights |
|---|---|---|
| October 2025 | 82% | 11 |
| November 2025 | 60% | 15 |
| December 2025 | 60% | 15 |
- Departures on time
- 78%
- Diverted
- 0%
- Flights flown
- 49
- Months covered
- 4
Same route, other flights
Keep nerding
Based on 49 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.