Carrier route record

F9DEN→CID

Frontier Airlines · Denver to Cedar Rapids

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 DEN to CID lands a B, 5 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 11 minutes early.

Set against the rest of the country, Frontier's DEN to CID record is 5 points better than the US average of 77.3%. That gap is worth roughly 54 fewer late arrivals for every thousand flights.

On time

82.7%

Arrivals under 15 minutes late, of 162 completed flights

Avg delay

57 min

Across delayed arrivals only, not all flights

Cancelled

1.22%

National rate is 1.89%

Whole route

79.2%

Every carrier on DEN to CID, 1,155 flights

These figures cover 164 flights between September 2025 and August 2026. The median arrival is 11 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

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Carrier by carrier

Frontier against every carrier on DEN to CID

Frontier flew 164 of the 1,155 flights on DEN to CID, about 14% of it. Its 82.7% on time is 4 points better than the route as a whole, which runs 79.2%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from Frontier at 82.7% to SkyWest at 76.9%. 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.

On-time performance by carrier on DEN to CID
Airline	Flights	On time	Avg delay	Cancelled	Grade
Frontier Airlines (this page)thin sample	164	82.7%	57 min	1.22%	B
United Airlines	728	79.3%	80 min	0.41%	B+
SkyWest Airlinesthin sample	263	76.9%	67 min	1.14%	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 matters more here than the choice of carrier. The gap between the best and worst window is 14 points, against half a point between the best and worst carrier.

5am–8am—
8am–11am33 flights90.9%
11am–2pm40 flights87.2%
2pm–5pm88 flights77.0%
5pm–8pm3 flights—
8pm–5am—

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

Book the morning departure. Flights leaving between 8am–11am arrive on time 90.9% of the time, against 77.0% for the afternoon window. That is 14 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 2pm–5pm window is the busiest, with 88 flights scheduled in it.

Across the year

Frontier on DEN to CID through the year

Jul–Sep 202517 flights—
Oct–Dec 202548 flights80.9%
Jan–Mar 202632 flights77.4%
Apr–Jun 202637 flights91.9%
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 82.7% on time across 164 flights.

Frontier on DEN to CID did not run the same all year. Its best quarter was Apr–Jun 2026 at 91.9% on time and its weakest Jan–Mar 2026 at 77.4%, a swing of 15 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 82.5%, a spread of 8 points.

Arrival by arrival

How late Frontier on DEN to CID runs when it is late

Frontier on DEN to CID often beats the schedule: 63 of 162 completed flights, 39%, arrived 15 minutes or more early. The 28 late arrivals split 7 under half an hour, 10 between 30 and 60 minutes, and 11 an hour or more.

15+ min early63 flights38.9%
Within 15 min71 flights43.8%
15–29 min late7 flights4.3%
30–59 min late10 flights6.2%
1–2 hours late9 flights5.6%
2+ hours late2 flights1.2%

Scale runs 0% to 100%.

Share of 162 completed flights by arrival against schedule.

7 of 29 late departures made up the time and arrived on time, 24% of them. 6 flights left on time and still arrived late.

The worst days

Worst days for Frontier on DEN to CID

The latest arrival of the period was on 11 December 2025, 2 hours 29 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across December, March, September and November, with no single month standing out.

The latest arrivals of Frontier on DEN to CID in the period
Date	Arrived late by	Largest filed cause
11 December 2025	2 hours 29 minutes	Late-arriving aircraft
12 March 2026	2 hours 5 minutes	Carrier
29 September 2025	1 hour 54 minutes	Extreme weather
10 November 2025	1 hour 37 minutes	Late-arriving aircraft
31 December 2025	1 hour 34 minutes	Carrier

Delay causes

Why Frontier runs late on this route

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 1,582 reported delay minutes.

Late-arriving aircraft
42%
Carrier
32%
National Airspace System
20%
Extreme weather
6%

42% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 1,582 reported delay minutes here, that single category outweighs weather by 7 to one. The split is drawn from 1,582 reported delay minutes.

The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 90.9% on time here.

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

6.8% 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 83.3% 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 DEN to CID

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 82.7% 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.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures