Flight Reliability
F9 4386 · Frontier Airlines
Denver → Cedar Rapids (DEN–CID)
- 78%
- Arrive within 15 minutes
- 3 min
- Average arrival delay
- 1.2%
- Cancelled
- 9 min early
- Median arrival delay
Based on 169 historical flights. Data through May 2026.
What the data says
Morning-you made the right choice.
F9 4386 departing between 9 AM–12 PM arrived on time 92% of the time, versus 64% between 12–3 PM.
Saturdays have been rough.
F9 4386 arrived on time 88% of the time on Sundays and just 60% on Saturdays. That gap is worth planning around.
A bit ahead of the Frontier Airlines network.
F9 4386 arrived on time 78% of the time, versus 73% across the Frontier Airlines network.
Trending in the right direction.
F9 4386 arrived on time 89% of the time over the last three months in the data, compared with 80% in the three months before that.
The breakdown
- Mon82%(28 flights)
- Tue77%(13 flights)
- Wed—(2 flights)
- Thu75%(40 flights)
- Fri77%(26 flights)
- Sat60%(15 flights)
- Sun88%(43 flights)
- 9 AM–12 PM92%(26 flights)
- 12–3 PM64%(11 flights)
- 3–6 PM77%(130 flights)
Jun 60% → May 100% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 60% | 15 |
| July 2025 | 72% | 18 |
| August 2025 | 77% | 17 |
| September 2025 | 77% | 17 |
| October 2025 | 83% | 18 |
| November 2025 | 83% | 18 |
| December 2025 | 73% | 11 |
| March 2026 | 77% | 17 |
| April 2026 | 90% | 10 |
| May 2026 | 100% | 12 |
- Departures on time
- 78%
- Diverted
- 0%
- Flights flown
- 167
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 169 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.