Cleveland (CLE) to Denver (DEN): On-Time Performance
Data through May 2026
The calendar drives reliability on CLE–DEN. October 2024 flights landed on schedule 93% of the time, but June 2025 dropped to 69% — a gap of 24 points. Across the full period the route averages 81% on-time against a national 78%. Morning departures also hold up better than evening ones (90% vs 58%), which matters most in the rough months.
- On-time
- 81%
- arrived <15 min late
- Avg delay
- 13 min
- completed flights
- Cancelled
- 0.3%
- Flights/day
- 5.0
- last 12 months
- Duration
- 3h 22m
- scheduled
- Distance
- 1,201 mi
Best airline from CLE to DEN
3 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 87% | 9 min | 0.2% | 1,908 |
| Southwest Airlines | 80% | 12 min | 0.2% | 1,188 |
| Frontier Airlines | 63% | 27 min | 1.3% | 551 |
Monthly on-time trend
Best time to fly from CLE to DEN
Aim for departures around 5 a.m. (93% on-time); avoid 8 p.m. departures (54%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 81% | 15 min |
| Tuesdaybest | 84% | 10 min |
| Wednesday | 82% | 11 min |
| Thursday | 80% | 12 min |
| Friday | 79% | 19 min |
| Saturday | 80% | 10 min |
| Sunday | 83% | 12 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft37%
- Airline operations24%
- National airspace system36%
- Weather3%
Frequently asked questions
- How often are flights from CLE to DEN delayed?
- 19% of CLE–DEN flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 13 minutes.
- Which airline is most reliable from CLE to DEN?
- United Airlines has the best on-time record on this route at 87%, based on 1,908 flights. 3 airlines flew CLE–DEN frequently enough to compare in this period.
- What is the best time of day to fly from CLE to DEN?
- Departures around 5 a.m. have the best record (93% on-time), while departures around 8 p.m. have the worst (54%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from CLE to DEN?
- The scheduled CLE–DEN flight time averages 3h 22m over 1,201 miles. Actual arrival times vary — flights on this route land 15+ minutes late 19% of the time.
- How often are CLE to DEN flights cancelled?
- 0.3% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from CLE to DEN?
- June 2025 was the roughest month in this dataset, with only 69% of arrivals on time. The best was October 2024 at 93%. If your dates are flexible, that 24-point gap is worth planning around.
Explore related pages
More routes from CLE
Based on 3,647 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.