Best Time to Fly CLE to DEN: On-Time Stats by Hour & Airline
Cleveland-Hopkins International → Denver International
Data through July 2026 · Last updated October 18, 2026
1,839 flights were scheduled from Cleveland (CLE) to Denver (DEN) in the last 12 months, and 82.3% of those that flew arrived on time, 4.7 points above the US average of 77.6%.
United Airlines was the most punctual of the 3 airlines on the route at 87.2%, while Frontier Airlines trailed at 75.0%.
September has been the best month (90% on time) and Thursday the weakest day of the week (80%).
0.5% of flights were cancelled, versus 1.8% nationally.
CLE 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 |
|---|---|---|---|---|
| United Airlines | 87.2% | 69 min | 0.1% | 941 |
| Southwest Airlines | 78.1% | 57 min | 0.5% | 604 |
| Frontier Airlines | 75.0% | 57 min | 2.0% | 294 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly CLE to DEN
On-time arrival % by scheduled departure hour (local time), 3,658 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 95.2% | 0.9% | 233 |
| 6am–7am | 92.2% | 0.0% | 191 |
| 7am–8am | 92.3% | 0.0% | 169 |
| 8am–9am | 89.8% | 0.4% | 504 |
| 9am–10am | 87.8% | 0.0% | 222 |
| 10am–11am | 90.7% | 0.0% | 217 |
| 11am–12pm | 90.3% | 0.0% | 298 |
| 12pm–1pm | 89.6% | 1.2% | 166 |
| 1pm–2pm | 85.1% | 0.0% | 87 |
| 2pm–3pm | 79.2% | 0.0% | 48 |
| 3pm–4pm | 68.9% | 0.0% | 93 |
| 4pm–5pm | 81.2% | 0.0% | 756 |
| 5pm–6pm | 65.0% | 0.6% | 162 |
| 6pm–7pm | 54.9% | 0.5% | 197 |
| 7pm–8pm | 60.4% | 1.0% | 199 |
| 8pm–9pm | 53.4% | 1.9% | 105 |
| 9pm–10pm | Limited data | 11 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on CLE 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) | 80.6% | -3.1 pts | 0.0% | 72 |
| Christmas & New Year (Dec 20 - Jan 3) | 79.9% | -3.8 pts | 0.0% | 174 |
| Summer peak (Jun 15 - Aug 15) | 77.5% | -6.1 pts | 0.4% | 738 |
| All other days | 83.7% | — | 0.3% | 2,674 |
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).