About 1 in 6 F9 4385 flights from Cedar Rapids arrived 15+ minutes late, diverted or cancelled over the past year (18%); 1.3% were cancelled. The typical flight landed 13 minutes early.
F9 4385: CID → DEN
Scheduled to leave Cedar Rapids at 8:16 p.m. local time. Over the past year it arrived on time 82% of the time (154 flights), in line with other F9 flights on the route at that hour (83%). Last seen in the data Aug 30, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 27 | 74% |
| Tuesday | 15 | — |
| Wednesday | 2 | — |
| Thursday | 41 | 78% |
| Friday | 23 | 87% |
| Saturday | 5 | — |
| Sunday | 41 | 90% |
Why it was late
All flights CID → DEN · Connecting off F9 4385? Check the risk
Questions
How often is F9 4385 from CID to DEN late?
Frontier Airlines 4385 from Cedar Rapids/Iowa City, IA to Denver, CO arrived 15 or more minutes late, was diverted or was cancelled on 18% of 154 scheduled flights between September 2025 and August 2026. 1.3% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check Frontier Airlines for today's flight. Method.