Cedar Rapids/Iowa City (CID) to Denver (DEN): On-Time Performance
Data through May 2026
The calendar drives reliability on CID–DEN. September 2024 flights landed on schedule 94% of the time, but July 2025 dropped to 55% — a gap of 39 points. Across the full period the route averages 78% on-time against a national 78%. Morning departures also hold up better than evening ones (84% vs 70%), which matters most in the rough months.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 21 min
- completed flights
- Cancelled
- 1.3%
- Flights/day
- 3.0
- last 12 months
- Duration
- 2h 17m
- scheduled
- Distance
- 692 mi
Best airline from CID to DEN
3 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 79% | 20 min | 1.3% | 1,475 |
| Frontier Airlines | 77% | 20 min | 1.8% | 396 |
| SkyWest Airlines | 76% | 27 min | 0.6% | 320 |
Monthly on-time trend
Best time to fly from CID to DEN
Aim for departures around 5 a.m. (94% on-time); avoid 6 p.m. departures (62%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 79% | 18 min |
| Tuesday | 80% | 16 min |
| Wednesday | 78% | 17 min |
| Thursday | 76% | 20 min |
| Friday | 79% | 20 min |
| Saturday | 76% | 28 min |
| Sundaybest | 82% | 25 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft28%
- Airline operations34%
- National airspace system31%
- Weather8%
Frequently asked questions
- How often are flights from CID to DEN delayed?
- 22% of CID–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 21 minutes.
- Which airline is most reliable from CID to DEN?
- United Airlines has the best on-time record on this route at 79%, based on 1,475 flights. 3 airlines flew CID–DEN frequently enough to compare in this period.
- What is the best time of day to fly from CID to DEN?
- Departures around 5 a.m. have the best record (94% on-time), while departures around 6 p.m. have the worst (62%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from CID to DEN?
- The scheduled CID–DEN flight time averages 2h 17m over 692 miles. Actual arrival times vary — flights on this route land 15+ minutes late 22% of the time.
- How often are CID to DEN flights cancelled?
- 1.3% 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 CID to DEN?
- July 2025 was the roughest month in this dataset, with only 55% of arrivals on time. The best was September 2024 at 94%. If your dates are flexible, that 39-point gap is worth planning around.
Explore related pages
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Based on 2,191 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.