Flight number record
F9 1918
Frontier Airlines · Denver to Cleveland
- Route
- DEN → CLE
- Departs
- 06:00
- Flights
- 257
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s F9 1918, check with Frontier Airlines.
F9 1918 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 10 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 257 flights, with a median arrival 10 minutes early.
Set against the rest of the country, F9 1918's record is 10 points better than the US average of 77.3%. That gap is worth roughly 101 fewer late arrivals for every thousand flights.
Key figures
On time
87.4%
Arrivals under 15 minutes late, of 253 completed flights
Avg delay
68 min
Across delayed arrivals only, not all flights
Cancelled
1.17%
National rate is 1.89%
1 hour+ late
2.8%
National rate is 8.3%
These figures cover 257 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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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 141 of 257 flights.
- Departs 06:00141 flights54.9%
Scale runs 0% to 100%.
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 level with that at 87.4%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
F9 1918 next to DEN to CLE
Every carrier on DEN to CLE combined arrived on time 75.9% of the time across 1,847 flights, so F9 1918 is 12 points ahead of it. Across its whole network Frontier Airlines managed 72.7%, which this flight beats by 15 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 1918thin sample | 257 | 87.4% | 68 min | 1.17% | A |
| All Frontier Airlines on DEN–CLEthin sample | 298 | 85.3% | 62 min | 1.01% | A |
| All carriers on DEN–CLE | 1,847 | 75.9% | 60 min | 0.32% | B+ |
| Frontier Airlines, whole network | 213,022 | 72.7% | 84 min | 2.05% | C |
Across the year
F9 1918 quarter by quarter
Quarter by quarter F9 1918 held fairly steady: 84.4% in Oct–Dec 2025, 87.0% in Jan–Mar 2026, 93.2% in Apr–Jun 2026 and 85.2% in Jul–Sep 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202521 flights—
- Oct–Dec 202546 flights84.4%
- Jan–Mar 202654 flights87.0%
- Apr–Jun 202674 flights93.2%
- Jul–Sep 202662 flights85.2%
Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, F9 1918 did best on Saturday at 96.8% on time and worst on Monday at 80.0%. Each day rests on about 37 flights, so a gap of 17 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late F9 1918 runs when it is late
F9 1918 often beats the schedule: 83 of 253 completed flights, 33%, arrived 15 minutes or more early. The 32 late arrivals split 14 under half an hour, 11 between 30 and 60 minutes, and 7 an hour or more.
- 15+ min early83 flights32.8%
- Within 15 min138 flights54.5%
- 15–29 min late14 flights5.5%
- 30–59 min late11 flights4.3%
- 1–2 hours late3 flights1.2%
- 2+ hours late4 flights1.6%
Scale runs 0% to 100%.
Share of 253 completed flights by arrival against schedule.
A late pushback is often recovered here: of 28 departures that left 15 minutes late or more, 9 still arrived on time. In the other direction, 13 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at CLE.
The worst days
Worst days for F9 1918
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.
| 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 |
| 16 February 2026 | 2 hours 31 minutes | Late-arriving aircraft |
| 28 April 2026 | 1 hour 35 minutes | Late-arriving aircraft |
Delay causes
Why F9 1918 runs late
Late-arriving aircraft accounts for 50% of the 2,175 delay minutes carriers reported here, and the remaining four split what is left.
- 50%Late-arriving aircraft
- 35%Carrier
- 15%National Airspace System
50% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,175 reported delay minutes here, that single category outweighs weather by 50 to one. The split is drawn from 2,175 delay minutes reported on F9 1918.
Cancellations sit at 1.17% against a national 1.89%, which is ordinary. Diversions add another 0.39%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 2.8% 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.
Every one of the 257 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. 257 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: 87.4% on time and 1.17% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- DEN to CLE, every carrier and departure
- CLE to DEN, the return direction
- United Airlines 1790 on the same route73.2%
- Denver International (DEN) delay statistics
- Cleveland Hopkins International (CLE) delay statistics
- Frontier Airlines on-time record
- Every Frontier Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.