Carrier route record
F9AUS→ATL
Frontier Airlines · Austin to Atlanta
- Flights
- 275
- Period
- July 2025 to June 2026
- Share of route
- 6%
- Carriers
- 4
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Frontier Airlines.
Frontier on AUS to ATL earns an F−, which is as low as this site's scale goes for a reason. Only 52.1% of flights arrive inside the 15-minute window, 25 points worse than the national rate of 77.6%. Late arrivals average a little over an hour. Treat any tight connection here as a coin flip. That rests on 275 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 3,232 at 85.6% on time.
The national on-time rate over the same period is 77.6%, so Frontier on AUS to ATL runs 25 points behind the country as a whole. Across a thousand flights that is about 255 extra late arrivals.
Key figures
On time
52.1%
Arrivals under 15 minutes late, of 265 completed flights
Avg delay
74 min
Across delayed arrivals only, not all flights
Cancelled
3.64%
National rate is 1.81%
Whole route
82.0%
Every carrier on AUS to ATL, 4,544 flights
These figures cover 275 flights between July 2025 and June 2026. Beyond the headline rate, 18.1% 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 AUS to ATL
Frontier flew 275 of the 4,544 flights on AUS to ATL, about 6% of it. Its 52.1% on time is 30 points worse than the route as a whole, which runs 82.0%. Ranked by on-time rate it is last of four carriers on the route, where the range runs from American at 100.0% to Frontier at 52.1%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 85.6% of the time; Southwest Airlines manages 78.8%. Sample sizes sit next to every figure, because a two-point gap across 1,036 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| American Airlinesthin sample | 1 | 100.0% | — | 0.00% | A+ |
| Delta Air Lines | 3,232 | 85.6% | 73 min | 1.49% | A |
| Southwest Airlines | 1,036 | 78.8% | 53 min | 0.68% | B+ |
| Frontier Airlines (this page)thin sample | 275 | 52.1% | 74 min | 3.64% | F− |
Delta leads Southwest by 7 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.
Flight by flight
Frontier flight numbers on AUS to ATL
Departure window
When Frontier runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 275 flights.
- 5am–8am—
- 8am–11am7 flights—
- 11am–2pm21 flights—
- 2pm–5pm67 flights56.7%
- 5pm–8pm177 flights47.9%
- 8pm–5am3 flights—
Scale runs 40% to 60%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 47.9% on time, against 56.7% for the 2pm–5pm slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 5pm–8pm window is the busiest, with 177 flights scheduled in it.
Across the year
Frontier on AUS to ATL through the year
- Jul–Sep 202559 flights34.6%
- Oct–Dec 202564 flights55.6%
- Jan–Mar 202670 flights56.5%
- Apr–Jun 202682 flights56.8%
Scale runs 25% to 60%. 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 52.1% on time across 275 flights.
Frontier on AUS to ATL did not run the same all year. Its best quarter was Apr–Jun 2026 at 56.8% on time and its weakest Jul–Sep 2025 at 34.6%, a swing of 22 points on roughly 69 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.
Across the week, Thursday is the strongest day at 65.4% on time and Sunday the weakest at 42.3%. 23 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 64% of the 9,404 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.
- 64%Late-arriving aircraft
- 25%National Airspace System
- 7%Carrier
- 4%Extreme weather
64% 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 9,404 reported delay minutes here, that single category outweighs weather by 18 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 9,404 reported delay minutes.
Cancellations run at 3.64%, against 1.81% nationally. That is roughly 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 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. 18.1% 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.
The 813 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 66.5% on time across 275 flights, 14 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 14 points of difference.
One caution: this is a thin sample. 275 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 AUS to ATL
Put together: the delay figures matter less here than the 3.64% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 2pm–5pm departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 265 completed flights over 12 months sit behind that.
Related
Where to go next
- AUS to ATL, every carrier
- Frontier on ATL to AUS, the return leg
- Delta Air Lines on AUS to ATL85.6%
- Southwest Airlines on AUS to ATL78.8%
- Frontier Airlines network-wide record
- Austin-Bergstrom International (AUS) delay statistics
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
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.