Best Time to Fly CID to DEN: On-Time Stats by Hour & Airline
The Eastern Iowa → Denver International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 79.0% of Cedar Rapids/Iowa City (CID) to Denver (DEN) flights arrived on time (1,127 scheduled flights). That is 1.4 points above the national average of 77.6%.
Frontier Airlines was the most punctual of the 3 airlines on the route at 80.6%, while SkyWest Airlines trailed at 76.4%.
September has been the best month (89% on time) and Thursday the weakest day of the week (76%).
1.1% of flights were cancelled, versus 1.8% nationally.
CID to DEN on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Frontier Airlines | 80.6% | 67 min | 1.2% | 167 |
| United Airlines | 79.4% | 104 min | 1.2% | 726 |
| SkyWest Airlines | 76.4% | 91 min | 0.4% | 234 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly CID to DEN
On-time arrival % by scheduled departure hour (local time), 2,254 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 94.0% | 0.5% | 185 |
| 6am–7am | Limited data | 8 | |
| 8am–9am | 81.3% | 1.9% | 514 |
| 9am–10am | 82.2% | 0.9% | 216 |
| 12pm–1pm | Limited data | 6 | |
| 1pm–2pm | Limited data | 24 | |
| 2pm–3pm | 81.2% | 4.5% | 67 |
| 3pm–4pm | 74.8% | 0.7% | 571 |
| 4pm–5pm | 81.7% | 1.6% | 194 |
| 5pm–6pm | Limited data | 23 | |
| 6pm–7pm | 59.2% | 0.5% | 219 |
| 7pm–8pm | 66.7% | 2.3% | 43 |
| 8pm–9pm | 78.5% | 1.1% | 179 |
| 9pm–10pm | Limited data | 4 | |
| 10pm–11pm | Limited data | 1 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on CID to DEN
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 68.2% | -13.5 pts | 4.3% | 46 |
| Christmas & New Year (Dec 20 - Jan 3) | 76.0% | -5.7 pts | 5.1% | 79 |
| Summer peak (Jun 15 - Aug 15) | 67.0% | -14.8 pts | 0.9% | 461 |
| All other days | 81.7% | — | 1.1% | 1,668 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).