Flight number record
F9 4966
Frontier Airlines · Las Vegas to Cleveland
- Route
- LAS → CLE
- Departs
- 00:18
- Flights
- 255
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s F9 4966, check with Frontier Airlines.
F9 4966 sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 6 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 255 flights, with a median arrival 5 minutes early.
The national on-time rate over the same period is 77.3%, so F9 4966 runs 6 points behind the country as a whole. Across a thousand flights that is about 61 extra late arrivals.
Key figures
On time
71.2%
Arrivals under 15 minutes late, of 243 completed flights
Avg delay
69 min
Across delayed arrivals only, not all flights
Cancelled
4.31%
National rate is 1.89%
1 hour+ late
10.3%
National rate is 8.3%
These figures cover 255 flights between September 2025 and August 2026. Beyond the headline rate, 10.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When F9 4966 flies
F9 4966 flies LAS to CLE without a single fixed slot. Its most common scheduled departure was 00:18, used on 84 of 255 flights, with 23:00 (54 flights) and 23:59 (51 flights) next.
- Departs 00:1884 flights32.9%
- Departs 23:0054 flights21.2%
- Departs 23:5951 flights20.0%
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 00:18 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and F9 4966 runs level with that at 71.2%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
F9 4966 next to LAS to CLE
Every carrier on LAS to CLE combined arrived on time 73.1% of the time across 1,003 flights, so F9 4966 is 2 points behind it. Frontier flew 636 flights on the same city pair under all its flight numbers, including this one, and those ran 72.9% on time. Across its whole network Frontier Airlines managed 72.7%, which this flight trails by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 4966thin sample | 255 | 71.2% | 69 min | 4.31% | C− |
| All Frontier Airlines on LAS–CLE | 636 | 72.9% | 80 min | 2.83% | C |
| All carriers on LAS–CLE | 1,003 | 73.1% | 64 min | 1.79% | C |
| Frontier Airlines, whole network | 213,022 | 72.7% | 84 min | 2.05% | C |
Across the year
F9 4966 quarter by quarter
F9 4966 did not run the same all year. Its best quarter was Oct–Dec 2025 at 78.7% on time and its weakest Jul–Sep 2026 at 57.4%, a swing of 21 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 202516 flights—
- Oct–Dec 202561 flights78.7%
- Jan–Mar 202660 flights74.1%
- Apr–Jun 202656 flights68.5%
- Jul–Sep 202662 flights57.4%
Scale runs 50% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, F9 4966 did best on Wednesday at 92.5% on time and worst on Friday at 56.8%. Each day rests on about 36 flights, so a gap of 36 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late F9 4966 runs when it is late
F9 4966 often beats the schedule: 71 of 243 completed flights, 29%, arrived 15 minutes or more early. The 70 late arrivals split 21 under half an hour, 24 between 30 and 60 minutes, and 25 an hour or more.
- 15+ min early71 flights29.2%
- Within 15 min102 flights42.0%
- 15–29 min late21 flights8.6%
- 30–59 min late24 flights9.9%
- 1–2 hours late19 flights7.8%
- 2+ hours late6 flights2.5%
Scale runs 0% to 100%.
Share of 243 completed flights by arrival against schedule.
19 of 84 late departures made up the time and arrived on time, 23% of them. 5 flights left on time and still arrived late.
The worst days
Worst days for F9 4966
The latest arrival of the period was on 5 August 2026, 8 hours 52 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 5 August 2026 | 8 hours 52 minutes | Carrier |
| 12 July 2026 | 8 hours 8 minutes | Carrier |
| 17 October 2025 | 7 hours 41 minutes | Carrier |
| 16 February 2026 | 2 hours 29 minutes | Late-arriving aircraft |
| 13 July 2026 | 2 hours 12 minutes | Late-arriving aircraft |
Delay causes
Why F9 4966 runs late
Carrier accounts for 57% of the 4,845 delay minutes carriers reported here, and the remaining four split what is left.
- 57%Carrier
- 34%Late-arriving aircraft
- 7%National Airspace System
- 2%Extreme weather
34% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,845 reported delay minutes here, that single category outweighs weather by 14 to one. The split is drawn from 4,845 delay minutes reported on F9 4966.
Cancellations run at 4.31%, against 1.89% nationally. That is about one flight in 25 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and routes
What a delay on this flight costs
10.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
At 1,824 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
Every one of the 255 flights under F9 4966 in the data flew LAS 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 4966
For a booking, the cancellation rate is the figure to plan around on F9 4966: 4.31% of its 255 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- LAS to CLE, every carrier and departure
- CLE to LAS, the return direction
- Harry Reid International (LAS) 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.