Routes › Cedar Rapids/Iowa City (CID) › CID to DEN
Route · 12 months to July 2026
Cedar Rapids/Iowa City to Denver: on-time record
The Eastern Iowa to Denver International
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report. Data through July 2026; this is a monthly history, not live flight status.
78.0% of scheduled CID to DEN flights arrived on time in the 12 months to July 2026. The figure covers 1,127 flights between Cedar Rapids/Iowa City and Denver by carriers that report to BTS, a distance of 692 miles.
That is 2.0 points above the national on-time share of 76.0% for the same period and 3.1 points above the 74.9% recorded for all departures from CID. Flights that did arrive were 12.2 min late on average, and 1.1% of scheduled flights were cancelled (national: 1.8%).
3 reporting carriers flew the route at least 60 times. Frontier Airlines had the highest on-time share at 79.6% of 167 flights; SkyWest Airlines had the lowest at 76.1% of 234.
By scheduled departure hour (local time at CID), flights leaving from 5 am to 6 am had the highest on-time share, 94.4%; those leaving from 6 pm to 7 pm had the lowest, 66.4%.
The on-time share is up 2.0 points on the previous 12 months (76.0%); cancellations moved from 1.4% to 1.1%.
Of the delay minutes that carriers assigned to a BTS cause category on this route, air carrier 41%, late-arriving aircraft 27% and national aviation system 21%.
- On time 78.0%
- Arrived 15+ minutes late 20.8%
- Cancelled 1.1%
- Diverted 0.2%
Airlines on the route compared
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| UA United Airlines | 726 | 64% | 78.2% | 15.2 min | 1.2% |
| OO SkyWest Airlines | 234 | 21% | 76.1% | 11.1 min | 0.4% |
| F9 Frontier Airlines | 167 | 15% | 79.6% | 0.9 min | 1.2% |
Carriers with at least 24 flights in the 12 months to July 2026. The on-time pill is green when a carrier is at or above the route's overall share. Regional carriers operate flights sold under larger airlines' brands; BTS lists the carrier that operated the flight.
Compared with the airports and the nation
| Measure | CID to DEN | All departures from CID | All arrivals at DEN | All reported flights |
|---|---|---|---|---|
| Arrived on time | 78.0% | 74.9% | 78.4% | 76.0% |
| Arrived 15+ minutes late | 20.8% | 22.2% | 20.5% | 21.9% |
| Cancelled | 1.1% | 2.7% | 0.8% | 1.8% |
| Diverted | 0.2% | 0.2% | 0.3% | 0.3% |
| Average arrival delay | 12.2 min | 14.4 min | 6.2 min | 8.1 min |
| Delay minutes per 100 flights | 2,091 | 2,355 | 1,561 | 1,684 |
| Scheduled flights | 1,127 | 8,397 | 319,190 | 7,043,858 |
12 months to July 2026. Delay minutes count late arrivals only (an early arrival is zero), so the per-100-flights row is a normalised total rather than an average of early and late.
The return direction, DEN to CID, recorded 79.6% on time across 1,128 flights in the same period.
Month by month
Year on year: on time 78.0% against 76.0% (+2.0 pts), cancelled 1.1% against 1.4%, flights 1,127 against 1,127.
By scheduled departure hour
Delay causes
Seasonality
| Calendar month | Flights | On time | Cancelled | Avg arrival delay | Years in sample |
|---|---|---|---|---|---|
| Jan | 201 | 75.1% | 3.0% | 14.4 min | 3 |
| Feb | 189 | 82.0% | 0.5% | 5.6 min | 3 |
| Mar | 233 | 82.0% | 1.7% | 4.7 min | 3 |
| Apr | 230 | 77.8% | 0.0% | 10.3 min | 3 |
| May | 296 | 74.0% | 0.3% | 15.9 min | 3 |
| Jun | 315 | 68.9% | 0.0% | 22.8 min | 3 |
| Jul | 339 | 68.7% | 0.6% | 20.2 min | 3 |
| Aug | 301 | 76.4% | 1.7% | 14.4 min | 3 |
| Sep | 307 | 87.6% | 0.7% | -6.3 min | 3 |
| Oct | 317 | 85.2% | 0.3% | -1.8 min | 3 |
| Nov | 282 | 84.0% | 2.5% | 7.6 min | 3 |
| Dec | 233 | 79.4% | 3.4% | 11.1 min | 3 |
Each calendar month summed across the 36 months on file, so most rows combine three years. The pill compares the month with the route's own 12-month share.
Other routes from Cedar Rapids/Iowa City (CID)
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| CID–ORD | Cedar Rapids/Iowa City to Chicago | 2,755 | 69.9% | 17.8 min | 4.0% |
| CID–DFW | Cedar Rapids/Iowa City to Dallas/Fort Worth | 1,172 | 75.6% | 21.1 min | 2.6% |
| CID–PHX | Cedar Rapids/Iowa City to Phoenix | 771 | 81.6% | 9.0 min | 1.3% |
| CID–CLT | Cedar Rapids/Iowa City to Charlotte | 462 | 81.8% | 13.0 min | 2.8% |
| CID–MSP | Cedar Rapids/Iowa City to Minneapolis | 399 | 76.4% | 10.7 min | 1.8% |
| CID–ATL | Cedar Rapids/Iowa City to Atlanta | 367 | 85.0% | -0.1 min | 2.2% |
| CID–DCA | Cedar Rapids/Iowa City to Washington | 363 | 68.9% | 9.3 min | 6.3% |
| CID–AZA | Cedar Rapids/Iowa City to Phoenix | 192 | 75.5% | 8.4 min | 1.6% |
All 20 routes and the airport record for CID · airport record for DEN
Questions and answers
How often are flights from Cedar Rapids/Iowa City to Denver on time?
78.0% of the 1,127 flights scheduled from CID to DEN in the 12 months to July 2026 arrived less than 15 minutes after their scheduled time. The national share for the same period was 76.0%. Cancelled and diverted flights count as not on time.
Which airline has the highest on-time share from CID to DEN?
Among reporting carriers with at least 60 flights on the route, Frontier Airlines had the highest on-time share (79.6%), followed by United Airlines (78.2%) and SkyWest Airlines (76.1%). Differences of a point or two on a few hundred flights are small.
What causes delays between Cedar Rapids/Iowa City and Denver?
For flights that arrived 15 or more minutes late, carriers attributed the delay minutes as follows: air carrier 41%, late-arriving aircraft 27%, national aviation system 21%, extreme weather 11%, security 0%. The categories are the carriers' own reports to BTS; weather that slows the wider system is usually recorded under the National Aviation System rather than extreme weather.
What time of day has the highest on-time share from CID?
Flights scheduled to leave CID from 5 am to 6 am arrived on time 94.4% of the time, the highest of any hour with enough flights to compare. The lowest was 6 pm to 7 pm at 66.4%. Delays tend to build through the day as late aircraft carry over to later flights.
Is it getting better?
The on-time share for the 12 months to July 2026 was 78.0%, up 2.0 points on the previous 12 months (76.0%). The monthly chart on this page shows each of the last 36 months. Across those months, September had the highest on-time share (87.6%) and July the lowest (68.7%).
Where does this data come from?
Every figure is computed from the Bureau of Transportation Statistics Reporting Carrier On-Time Performance files, which list each scheduled domestic flight by the carriers required to report. This page covers August 2023 to July 2026. It shows totals and averages only; it is not a live flight-status service.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987 to present), monthly files August 2023 to July 2026, a US government work in the public domain. Figures are totals and averages over all scheduled flights by reporting carriers on the route; no individual flight or aircraft is identified. Times are local to the departure airport. The load factor and passenger counts from the BTS T-100 series are not included in this edition. See the methodology; report processing errors through corrections.