Carrier route record

F9DEN→CLE

Frontier Airlines · Denver to Cleveland

Flights: 298
Period: September 2025 to August 2026
Share of route: 16%
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 CLE earns an A. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 298 flights. The strongest carrier on the route with a full sample, United Airlines, flew 939 at 82.3% on time.

Set against the rest of the country, Frontier's DEN to CLE record is 8 points better than the US average of 77.3%. That gap is worth roughly 80 fewer late arrivals for every thousand flights.

On time

85.3%

Arrivals under 15 minutes late, of 293 completed flights

Avg delay

62 min

Across delayed arrivals only, not all flights

Cancelled

1.01%

National rate is 1.89%

Whole route

75.9%

Every carrier on DEN to CLE, 1,847 flights

These figures cover 298 flights between September 2025 and August 2026. The median arrival is 10 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 CLE

Frontier flew 298 of the 1,847 flights on DEN to CLE, about 16% of it. Its 85.3% on time is 9 points better than the route as a whole, which runs 75.9%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from Frontier at 85.3% to Southwest at 61.4%.

The choice of carrier is not cosmetic here. United Airlines arrives on time 82.3% of the time; Southwest Airlines manages 61.4%. Sample sizes sit next to every figure, because a two-point gap across 610 flights means less than a ten-point one.

On-time performance by carrier on DEN to CLE
Airline	Flights	On time	Avg delay	Cancelled	Grade
Frontier Airlines (this page)thin sample	298	85.3%	62 min	1.01%	A
United Airlines	939	82.3%	70 min	0.00%	B+
Southwest Airlines	610	61.4%	53 min	0.49%	D+

The spread between United and Southwest is 21 points, wide enough that it should decide the booking. On a hundred trips that is 21 more arrivals inside the on-time window.

Flight by flight

Frontier flight numbers on DEN to CLE

F9 191806:0087.4% · 257 flights

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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 18 points, against 21 points between the best and worst carrier.

5am–8am165 flights92.7%
8am–11am21 flights—
11am–2pm25 flights—
2pm–5pm46 flights75.0%
5pm–8pm21 flights—
8pm–5am20 flights—

Scale runs 65% to 100%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 92.7% of the time, against 75.0% for the afternoon window. That is 18 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 165 flights scheduled in it.

Across the year

Frontier on DEN to CLE through the year

Jul–Sep 202521 flights—
Oct–Dec 202576 flights77.0%
Jan–Mar 202656 flights87.5%
Apr–Jun 202683 flights92.8%
Jul–Sep 202662 flights85.2%

Scale runs 70% to 100%. 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 85.3% on time across 298 flights.

Frontier on DEN to CLE did not run the same all year. Its best quarter was Apr–Jun 2026 at 92.8% on time and its weakest Oct–Dec 2025 at 77.0%, a swing of 16 points on roughly 75 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, Saturday is the strongest day at 97.3% on time and Monday the weakest at 76.6%, a spread of 21 points.

Arrival by arrival

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

Frontier on DEN to CLE often beats the schedule: 101 of 293 completed flights, 34%, arrived 15 minutes or more early. The 43 late arrivals split 19 under half an hour, 15 between 30 and 60 minutes, and 9 an hour or more.

15+ min early101 flights34.5%
Within 15 min149 flights50.9%
15–29 min late19 flights6.5%
30–59 min late15 flights5.1%
1–2 hours late4 flights1.4%
2+ hours late5 flights1.7%

Scale runs 0% to 100%.

Share of 293 completed flights by arrival against schedule.

12 of 41 late departures made up the time and arrived on time, 29% of them. 14 flights left on time and still arrived late.

The worst days

Worst days for Frontier on DEN to CLE

The latest arrival of the period was on 31 August 2026, 8 hours 3 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.

The latest arrivals of Frontier on DEN to CLE in the period
Date	Arrived late by	Largest filed cause
31 August 2026	8 hours 3 minutes	Late-arriving aircraft
8 September 2025	4 hours 46 minutes	Carrier
24 August 2026	3 hours 57 minutes	Late-arriving aircraft
29 December 2025	2 hours 38 minutes	Late-arriving aircraft
16 February 2026	2 hours 31 minutes	Late-arriving aircraft

Delay causes

Why Frontier runs late on this route

Late-arriving aircraft accounts for 54% of the 2,669 delay minutes carriers reported here, and the remaining four split what is left.

Late-arriving aircraft
54%
Carrier
32%
National Airspace System
13%

54% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,669 reported delay minutes here, that single category outweighs weather by 54 to one. The split is drawn from 2,669 reported delay minutes.

The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 92.7% on time here.

Cancellations sit at 1.01% against a national 1.89%, which is ordinary. Diversions add another 0.67%.

Connections and stage length

What a delay here costs

Badly late arrivals are rare here: only 3.1% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

The 1,201 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 is a different operation and performs like one: it runs 77.3% on time across 296 flights, 8 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 8 points of difference.

One caution: this is a thin sample. 298 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 CLE

Put together: treat all of this as provisional. 298 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 85.3% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 293 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