Flight number record

F9 1918

Frontier Airlines · Denver to Cleveland

Route: DEN → CLE
Departs: 06:00
Flights: 255
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s F9 1918, check with Frontier Airlines.

F9 1918 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 77.6%. When something does go wrong the average delay runs about 50 minutes. That rests on 255 flights, with a median arrival 10 minutes early.

Set against the rest of the country, F9 1918's record is 8 points better than the US average of 77.6%. That gap is worth roughly 84 fewer late arrivals for every thousand flights.

On time

86.0%

Arrivals under 15 minutes late, of 250 completed flights

Avg delay

51 min

Across delayed arrivals only, not all flights

Cancelled

1.18%

National rate is 1.81%

1 hour+ late

3.6%

National rate is 8.1%

These figures cover 255 flights between July 2025 and June 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.

Schedule

When F9 1918 flies

F9 1918 flies DEN to CLE without a single fixed slot. Its most common scheduled departure was 06:00, used on 114 of 255 flights. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:00114 flights44.7%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and F9 1918 runs 3 points worse at 86.0%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

F9 1918 next to DEN to CLE

Every carrier on DEN to CLE combined arrived on time 75.5% of the time across 1,842 flights, so F9 1918 is 11 points ahead of it. Across its whole network Frontier Airlines managed 73.2%, which this flight beats by 13 points.

F9 1918 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
F9 1918thin sample	255	86.0%	51 min	1.18%	A
All Frontier Airlines on DEN–CLEthin sample	296	84.1%	49 min	1.01%	B
All carriers on DEN–CLE	1,842	75.5%	59 min	0.33%	B+
Frontier Airlines, whole network	205,332	73.2%	84 min	1.85%	C

Across the year

F9 1918 quarter by quarter

F9 1918 did not run the same all year. Its best quarter was Apr–Jun 2026 at 93.2% on time and its weakest Jul–Sep 2025 at 79.2%, a swing of 14 points on roughly 64 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.

Jul–Sep 202581 flights79.2%
Oct–Dec 202546 flights84.4%
Jan–Mar 202654 flights87.0%
Apr–Jun 202674 flights93.2%

Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, F9 1918 did best on Saturday at 93.5% on time and worst on Sunday at 76.6%. Each day rests on about 36 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Delay causes

Why F9 1918 runs late

One category carries most of the weight here. Carrier accounts for 43% of the 1,777 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
43%
Late-arriving aircraft
39%
National Airspace System
18%

39% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 1,777 reported delay minutes here, that single category outweighs weather by 39 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 1,777 delay minutes reported on F9 1918.

Cancellations sit at 1.18% against a national 1.81%, which is ordinary. Diversions add another 0.78%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 3.6% land an hour or more behind schedule, against 8.1% 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

Every one of the 255 flights under F9 1918 in the data flew DEN to CLE. The number was not reused on any other city pair, which makes this a clean record of one route.

One caution: this is a thin sample. 255 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 F9 1918

For a booking, F9 1918 has one of the better records a US domestic flight can show: 86.0% on time and 1.18% cancelled. That is a base rate, not a promise about any single day.

Where to go next

A flight number here means Frontier Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures