Carrier route record
F9CID→DEN
Frontier Airlines · Cedar Rapids to Denver
- Flights
- 164
- Period
- September 2025 to August 2026
- Share of route
- 14%
- Carriers
- 3
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Frontier Airlines.
Frontier on CID to DEN lands a B, 6 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 164 flights, with a median arrival 13 minutes early.
Set against the rest of the country, Frontier's CID to DEN record is 6 points better than the US average of 77.3%. That gap is worth roughly 60 fewer late arrivals for every thousand flights.
Key figures
On time
83.3%
Arrivals under 15 minutes late, of 162 completed flights
Avg delay
66 min
Across delayed arrivals only, not all flights
Cancelled
1.22%
National rate is 1.89%
Whole route
78.8%
Every carrier on CID to DEN, 1,154 flights
These figures cover 164 flights between September 2025 and August 2026. Beyond the headline rate, 8.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Carrier by carrier
Frontier against every carrier on CID to DEN
Frontier flew 164 of the 1,154 flights on CID to DEN, about 14% of it. Its 83.3% on time is 5 points better than the route as a whole, which runs 78.8%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from Frontier at 83.3% to SkyWest at 77.8%. One 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 Airlines (this page)thin sample | 164 | 83.3% | 66 min | 1.22% | B |
| United Airlines | 728 | 78.1% | 105 min | 1.10% | B |
| SkyWest Airlinesthin sample | 262 | 77.8% | 86 min | 0.38% | B+ |
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 Frontier 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 164 flights.
- 5am–8am—
- 8am–11am—
- 11am–2pm—
- 2pm–5pm73 flights86.1%
- 5pm–8pm19 flights—
- 8pm–5am72 flights83.3%
Scale runs 75% to 90%. Rows with fewer than 30 flights show a dash.
The 2pm–5pm window is the strongest at 86.1% on time. The full set of windows spans 3 points.
Across the year
Frontier on CID to DEN through the year
- Jul–Sep 202517 flights—
- Oct–Dec 202548 flights78.7%
- Jan–Mar 202632 flights80.6%
- Apr–Jun 202637 flights89.2%
- Jul–Sep 202630 flights86.7%
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 83.3% on time across 164 flights.
Frontier on CID to DEN did not run the same all year. Its best quarter was Apr–Jun 2026 at 89.2% on time and its weakest Oct–Dec 2025 at 78.7%, a swing of 11 points on roughly 41 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
Across the week, Sunday is the strongest day at 90.2% on time and Thursday the weakest at 80.0%, a spread of 10 points.
Arrival by arrival
How late Frontier on CID to DEN runs when it is late
Frontier on CID to DEN often beats the schedule: 74 of 162 completed flights, 46%, arrived 15 minutes or more early. The 27 late arrivals split 6 under half an hour, 8 between 30 and 60 minutes, and 13 an hour or more.
- 15+ min early74 flights45.7%
- Within 15 min61 flights37.7%
- 15–29 min late6 flights3.7%
- 30–59 min late8 flights4.9%
- 1–2 hours late11 flights6.8%
- 2+ hours late2 flights1.2%
Scale runs 0% to 100%.
Share of 162 completed flights by arrival against schedule.
6 of 28 late departures made up the time and arrived on time, 21% of them. 5 flights left on time and still arrived late.
The worst days
Worst days for Frontier on CID to DEN
The latest arrival of the period was on 12 March 2026, 2 hours 34 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 12 March 2026 | 2 hours 34 minutes | Late-arriving aircraft |
| 11 December 2025 | 2 hours 10 minutes | Late-arriving aircraft |
| 30 November 2025 | 1 hour 52 minutes | Late-arriving aircraft |
| 31 December 2025 | 1 hour 46 minutes | Late-arriving aircraft |
| 22 September 2025 | 1 hour 40 minutes | Late-arriving aircraft |
Delay causes
Why Frontier runs late on this route
Late-arriving aircraft accounts for 70% of the 1,770 delay minutes carriers reported here, and the remaining four split what is left.
- 70%Late-arriving aircraft
- 22%National Airspace System
- 9%Carrier
70% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 1,770 reported delay minutes here, that single category outweighs weather by 70 to one. The split is drawn from 1,770 reported delay minutes.
Cancellations sit at 1.22% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and stage length
What a delay here costs
8.0% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
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 82.7% on time across 164 flights, within half 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. 164 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 Frontier on CID to DEN
Put together: treat all of this as provisional. 164 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 83.3% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 162 completed flights over 12 months sit behind that.
Related
Where to go next
- CID to DEN, every carrier
- Frontier on DEN to CID, the return leg
- United Airlines on CID to DEN78.1%
- SkyWest Airlines on CID to DEN77.8%
- Frontier Airlines network-wide record
- Denver International (DEN) delay statistics
- Why the first flight of the morning is statistically safest
- 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.