Carrier route record
F9LAS→PHX
Frontier Airlines · Las Vegas to Phoenix
- Flights
- 865
- Period
- July 2025 to June 2026
- Share of route
- 14%
- Carriers
- 6
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Frontier Airlines.
Frontier on LAS to PHX lands a B, 2 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That is a workable record, not a spotless one. That rests on 865 flights. The strongest carrier on the route with a full sample, American Airlines, flew 1,688 at 81.0% on time.
The US average over the same twelve months is 77.6%, so there is little to separate Frontier on LAS to PHX from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
79.5%
Arrivals under 15 minutes late, of 855 completed flights
Avg delay
95 min
Across delayed arrivals only, not all flights
Cancelled
1.16%
National rate is 1.81%
Whole route
78.2%
Every carrier on LAS to PHX, 6,025 flights
These figures cover 865 flights between July 2025 and June 2026. Beyond the headline rate, 9.1% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
Frontier against every carrier on LAS to PHX
Frontier flew 865 of the 6,025 flights on LAS to PHX, about 14% of it. Its 79.5% on time is about level with the route as a whole at 78.2%. Ranked by on-time rate it is number five of six carriers on the route, where the range runs from Spirit at 100.0% to Southwest at 76.4%. Three of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The two carriers here are closely matched: 5 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Spirit Airlinesthin sample | 4 | 100.0% | — | 0.00% | A+ |
| Envoy Airthin sample | 6 | 100.0% | — | 0.00% | A+ |
| SkyWest Airlinesthin sample | 16 | 81.2% | 53 min | 0.00% | B+ |
| American Airlines | 1,688 | 81.0% | 78 min | 0.83% | B+ |
| Frontier Airlines (this page) | 865 | 79.5% | 95 min | 1.16% | B |
| Southwest Airlines | 3,446 | 76.4% | 53 min | 1.04% | B |
No carrier stands out. American tops the table at 81.0%, 5 points clear of the bottom, which is inside the range this kind of sample moves year to year.
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 23 points, against 5 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am114 flights89.3%
- 8am–11am133 flights87.0%
- 11am–2pm98 flights87.6%
- 2pm–5pm94 flights80.6%
- 5pm–8pm185 flights66.3%
- 8pm–5am241 flights77.2%
Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 89.3% of the time, against 66.3% for the evening window. That is 23 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8pm–5am window is the busiest, with 241 flights scheduled in it.
Across the year
Frontier on LAS to PHX through the year
Delays peak in November, when the on-time rate falls to 69.9%. February is the strongest month at 90.8%. Moving a flexible trip across that boundary buys 21 points. April was the busiest month here, with 83 flights.
Across the week, Saturday is the strongest day at 88.6% on time and Thursday the weakest at 74.0%. 15 points is a smaller lever than departure hour, but it is free.
Delay causes
Why Frontier runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 62% of the 17,000 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.
- 62%Late-arriving aircraft
- 21%National Airspace System
- 18%Carrier
62% 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 17,000 reported delay minutes here, that single category outweighs weather by 62 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 16,549 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 89.3% on time here.
Cancellations sit at 1.16% against a national 1.81%, which is ordinary. Diversions add another 0.00%.
Connections and stage length
What a delay here costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.1% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
At 255 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 5am–8am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 82.7% on time across 861 flights, 3 points above 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 3 points of difference.
One caution: this is a thin sample. 865 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 LAS to PHX
Put together: treat all of this as provisional. 865 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 79.5% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 855 completed flights over 12 months sit behind that.
Related
Where to go next
- LAS to PHX, every carrier
- Frontier on PHX to LAS, the return leg
- American Airlines on LAS to PHX81.0%
- Southwest Airlines on LAS to PHX76.4%
- Frontier Airlines network-wide record
- Harry Reid International (LAS) delay statistics
- Phoenix Sky Harbor International (PHX) delay statistics
- Why the first flight of the morning is statistically safest
- How often a connection fails at the major US hubs
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.