Flight number record
F9 4048
Frontier Airlines · Las Vegas to Phoenix
- Route
- LAS → PHX
- Departs
- 06:00
- Flights
- 286
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s F9 4048, check with Frontier Airlines.
F9 4048 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 9 points better than the national rate of 77.3%. When something does go wrong the average delay runs close to two hours. That rests on 286 flights, with a median arrival 14 minutes early.
Set against the rest of the country, F9 4048's record is 9 points better than the US average of 77.3%. That gap is worth roughly 89 fewer late arrivals for every thousand flights.
Key figures
On time
86.2%
Arrivals under 15 minutes late, of 282 completed flights
Avg delay
121 min
Across delayed arrivals only, not all flights
Cancelled
1.40%
National rate is 1.89%
1 hour+ late
6.7%
National rate is 8.3%
These figures cover 286 flights between September 2025 and August 2026. The median arrival is 14 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 4048 flies
F9 4048 flies LAS to PHX without a single fixed slot. Its most common scheduled departure was 06:00, used on 36 of 286 flights, with 09:59 (34 flights) and 10:04 (32 flights) next.
- Departs 06:0036 flights12.6%
- Departs 09:5934 flights11.9%
- Departs 10:0432 flights11.2%
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 4048 runs 3 points worse at 86.2%. 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 4048 next to LAS to PHX
Every carrier on LAS to PHX combined arrived on time 77.3% of the time across 6,012 flights, so F9 4048 is 9 points ahead of it. Frontier flew 850 flights on the same city pair under all its flight numbers, including this one, and those ran 78.7% on time. Across its whole network Frontier Airlines managed 72.7%, which this flight beats by 14 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 4048thin sample | 286 | 86.2% | 121 min | 1.40% | A |
| All Frontier Airlines on LAS–PHX | 850 | 78.7% | 98 min | 0.82% | B+ |
| All carriers on LAS–PHX | 6,012 | 77.3% | 66 min | 1.01% | B |
| Frontier Airlines, whole network | 213,022 | 72.7% | 84 min | 2.05% | C |
Across the year
F9 4048 quarter by quarter
F9 4048 did not run the same all year. Its best quarter was Jan–Mar 2026 at 94.1% on time and its weakest Jul–Sep 2026 at 80.3%, a swing of 14 points on roughly 72 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 202514 flights—
- Oct–Dec 202575 flights81.3%
- Jan–Mar 202651 flights94.1%
- Apr–Jun 202684 flights89.0%
- Jul–Sep 202662 flights80.3%
Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, F9 4048 did best on Thursday at 93.5% on time and worst on Tuesday at 72.7%. Each day rests on about 41 flights, so a gap of 21 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late F9 4048 runs when it is late
F9 4048 often beats the schedule: 140 of 282 completed flights, 50%, arrived 15 minutes or more early. The 39 late arrivals split 7 under half an hour, 13 between 30 and 60 minutes, and 19 an hour or more.
- 15+ min early140 flights49.6%
- Within 15 min103 flights36.5%
- 15–29 min late7 flights2.5%
- 30–59 min late13 flights4.6%
- 1–2 hours late11 flights3.9%
- 2+ hours late8 flights2.8%
Scale runs 0% to 100%.
Share of 282 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 40 departures that left 15 minutes late or more, only 4 made it up before arrival. Only 3 left on time and still arrived late.
The worst days
Worst days for F9 4048
The latest arrival of the period was on 9 March 2026, 17 hours 5 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 9 March 2026 | 17 hours 5 minutes | Late-arriving aircraft |
| 22 September 2025 | 7 hours 30 minutes | Late-arriving aircraft |
| 15 July 2026 | 6 hours 38 minutes | Late-arriving aircraft |
| 5 October 2025 | 5 hours 34 minutes | Late-arriving aircraft |
| 22 December 2025 | 5 hours 12 minutes | Late-arriving aircraft |
Delay causes
Why F9 4048 runs late
Late-arriving aircraft accounts for 71% of the 4,714 delay minutes carriers reported here, and the remaining four split what is left.
- 71%Late-arriving aircraft
- 15%Carrier
- 14%National Airspace System
71% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,714 reported delay minutes here, that single category outweighs weather by 71 to one. The split is drawn from 4,714 delay minutes reported on F9 4048.
Cancellations sit at 1.40% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
6.7% 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 close to two hours, which a normal layover absorbs.
Every one of the 286 flights under F9 4048 in the data flew LAS to PHX. 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. 286 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 4048
For a booking, F9 4048 has one of the better records a US domestic flight can show: 86.2% on time and 1.40% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- LAS to PHX, every carrier and departure
- PHX to LAS, the return direction
- American Airlines 1808 on the same route91.4%
- Harry Reid International (LAS) delay statistics
- Phoenix Sky Harbor International (PHX) 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.