Cedar Rapids/Iowa City (CID) to Denver (DEN): On-Time Performance
Data through July 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 69%), which matters most in the rough months.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 21 min
- completed flights
- Cancelled
- 1.2%
- Flights/day
- 3.1
- last 12 months
- Duration
- 2h 18m
- scheduled
- Distance
- 692 mi
Best airline from CID to DEN
3 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Frontier Airlinesmost reliable | 79% | 17 min | 1.8% | 398 |
| United Airlines | 78% | 21 min | 1.2% | 1,536 |
| SkyWest Airlines | 75% | 25 min | 0.5% | 423 |
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 (59%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 77% | 23 min |
| Tuesday | 80% | 16 min |
| Wednesday | 77% | 20 min |
| Thursday | 76% | 19 min |
| Friday | 79% | 20 min |
| Saturday | 78% | 24 min |
| Sundaybest | 81% | 24 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft26%
- Airline operations37%
- National airspace system30%
- 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 2024-07 and 2026-07. The average arrival delay across completed flights was 21 minutes.
- Which airline is most reliable from CID to DEN?
- Frontier Airlines has the best on-time record on this route at 79%, based on 398 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 (59%). 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 18m 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?
- 1.2% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, 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
More routes from CID
Other ways to fly to Denver (DEN)
Related guides
Based on 2,357 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.