Carrier route record
UACID→DEN
United Airlines · Cedar Rapids to Denver
- Flights
- 728
- Period
- September 2025 to August 2026
- Share of route
- 63%
- Carriers
- 3
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with United Airlines.
United on CID to DEN lands a B, about a point better than the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That rests on 728 flights, with a median arrival 3 minutes early.
The US average over the same twelve months is 77.3%, so there is little to separate United on CID to DEN from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
78.1%
Arrivals under 15 minutes late, of 717 completed flights
Avg delay
105 min
Across delayed arrivals only, not all flights
Cancelled
1.10%
National rate is 1.89%
Whole route
78.8%
Every carrier on CID to DEN, 1,154 flights
These figures cover 728 flights between September 2025 and August 2026. Beyond the headline rate, 9.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
United against every carrier on CID to DEN
United flew 728 of the 1,154 flights on CID to DEN, most of the route. Its 78.1% on time is about level with the route as a whole at 78.8%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Frontier at 83.3% to SkyWest at 77.8%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Frontier Airlinesthin sample | 164 | 83.3% | 66 min | 1.22% | B |
| United Airlines (this page) | 728 | 78.1% | 105 min | 1.10% | B |
| SkyWest Airlinesthin sample | 262 | 77.8% | 86 min | 0.38% | B+ |
Flight by flight
United flight numbers on CID to DEN
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When United runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 728 flights.
- 5am–8am1 flights—
- 8am–11am365 flights79.7%
- 11am–2pm—
- 2pm–5pm362 flights76.5%
- 5pm–8pm—
- 8pm–5am—
Scale runs 70% to 85%. Rows with fewer than 30 flights show a dash.
The 8am–11am window is the strongest at 79.7% on time. The full set of windows spans 3 points.
Across the year
United on CID to DEN through the year
August is the worst month at 60.7% on time, 28 points below February, the best at 89.1%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. August was the busiest month here, with 63 flights.
Across the week, Tuesday is the strongest day at 82.9% on time and Saturday the weakest at 71.7%, a spread of 11 points.
Arrival by arrival
How late United on CID to DEN runs when it is late
The 157 late arrivals split 43 under half an hour, 46 between 30 and 60 minutes, and 68 an hour or more.
- 15+ min early152 flights21.2%
- Within 15 min408 flights56.9%
- 15–29 min late43 flights6.0%
- 30–59 min late46 flights6.4%
- 1–2 hours late26 flights3.6%
- 2+ hours late42 flights5.9%
Scale runs 0% to 100%.
Share of 717 completed flights by arrival against schedule.
33 of 162 late departures made up the time and arrived on time, 20% of them. 28 flights left on time and still arrived late.
The worst days
Worst days for United on CID to DEN
The latest arrival of the period was on 27 July 2026, 11 hours 7 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 27 July 2026 | 11 hours 7 minutes | Carrier |
| 27 December 2025 | 8 hours 58 minutes | Late-arriving aircraft |
| 26 November 2025 | 8 hours 54 minutes | Carrier |
| 12 August 2026 | 8 hours 35 minutes | Carrier |
| 29 December 2025 | 8 hours 12 minutes | Late-arriving aircraft |
Delay causes
Why United runs late on this route
Carrier accounts for 50% of the 16,000 delay minutes carriers reported here, and the remaining four split what is left.
- 50%Carrier
- 21%Late-arriving aircraft
- 17%National Airspace System
- 12%Extreme weather
Extreme weather accounts for 12% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.1 times the usual weather exposure. The split is drawn from 16,415 reported delay minutes.
The largest share of delay minutes, 50%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 8,125 of the 16,000 delay minutes reported here.
Cancellations sit at 1.10% against a national 1.89%, which is ordinary. Diversions add another 0.41%.
Connections and stage length
What a delay here costs
9.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The 692 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The return leg runs 79.3% on time across 728 flights, within about a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 728 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking United on CID to DEN
Put together: treat all of this as provisional. 728 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 78.1% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 717 completed flights over 12 months sit behind that.
Related
Where to go next
- CID to DEN, every carrier
- United on DEN to CID, the return leg
- Frontier Airlines on CID to DEN83.3%
- SkyWest Airlines on CID to DEN77.8%
- United Airlines network-wide record
- Denver International (DEN) delay statistics
- How often a connection fails at the major US hubs
- Connecting flights: how much buffer the data says you need
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.