Carrier route record
F9PHX→AUS
Frontier Airlines · Phoenix to Austin
- Flights
- 162
- Period
- July 2025 to June 2026
- Share of route
- 5%
- Carriers
- 4
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Frontier Airlines.
Frontier on PHX to AUS earns a B+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.6%. When something does go wrong the average delay runs a little over an hour. That rests on 162 flights. The strongest carrier on the route with a full sample, Southwest Airlines, flew 1,977 at 74.8% on time.
Set against the rest of the country, Frontier's PHX to AUS record is 7 points better than the US average of 77.6%. That gap is worth roughly 69 fewer late arrivals for every thousand flights.
Key figures
On time
84.5%
Arrivals under 15 minutes late, of 161 completed flights
Avg delay
75 min
Across delayed arrivals only, not all flights
Cancelled
0.62%
National rate is 1.81%
Whole route
75.3%
Every carrier on PHX to AUS, 3,365 flights
These figures cover 162 flights between July 2025 and June 2026. Beyond the headline rate, 8.1% 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 PHX to AUS
Frontier flew 162 of the 3,365 flights on PHX to AUS, about 5% of it. Its 84.5% on time is 9 points better than the route as a whole, which runs 75.3%. Ranked by on-time rate it is number two of four carriers on the route, where the range runs from Envoy at 92.3% to American at 74.6%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The two carriers here are closely matched: half a point 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 |
|---|---|---|---|---|---|
| Envoy Airthin sample | 26 | 92.3% | 20 min | 0.00% | A+ |
| Frontier Airlines (this page)thin sample | 162 | 84.5% | 75 min | 0.62% | B+ |
| Southwest Airlines | 1,977 | 74.8% | 48 min | 0.61% | C+ |
| American Airlines | 1,200 | 74.6% | 65 min | 1.08% | C |
No carrier stands out. Southwest tops the table at 74.8%, half a point 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 26 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am85 flights95.3%
- 8am–11am8 flights—
- 11am–2pm14 flights—
- 2pm–5pm49 flights69.4%
- 5pm–8pm6 flights—
- 8pm–5am—
Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 95.3% of the time, against 69.4% for the afternoon window. That is 26 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 85 flights scheduled in it.
Across the year
Frontier on PHX to AUS through the year
- Jul–Sep 202552 flights80.8%
- Oct–Dec 202544 flights84.1%
- Jan–Mar 202648 flights87.2%
- Apr–Jun 202618 flights—
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 84.5% on time across 162 flights.
Quarter by quarter Frontier on PHX to AUS held fairly steady: 80.8% in Jul–Sep 2025, 84.1% in Oct–Dec 2025 and 87.2% in Jan–Mar 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
Across the week, Thursday is the strongest day at 90.6% on time and Monday the weakest at 82.4%. 8 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 58% of the 1,867 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.
- 58%Late-arriving aircraft
- 24%Carrier
- 19%National Airspace System
58% 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 1,867 reported delay minutes here, that single category outweighs weather by 58 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 1,867 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 95.3% on time here.
Cancellations are rare at 0.62%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here costs
8.1% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
The 872 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.
The return leg is a different operation and performs like one: it runs 77.4% on time across 162 flights, 7 points below 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 7 points of difference.
One caution: this is a thin sample. 162 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 PHX to AUS
Put together: treat all of this as provisional. 162 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 84.5% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 161 completed flights over 12 months sit behind that.
Related
Where to go next
- PHX to AUS, every carrier
- Frontier on AUS to PHX, the return leg
- Southwest Airlines on PHX to AUS74.8%
- American Airlines on PHX to AUS74.6%
- Frontier Airlines network-wide record
- Phoenix Sky Harbor International (PHX) delay statistics
- Austin-Bergstrom International (AUS) delay statistics
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.04 million flight records
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.