Carrier route record
F9ATL→LAS
Frontier Airlines · Atlanta to Las Vegas
- Flights
- 562
- Period
- July 2025 to June 2026
- Share of route
- 12%
- Carriers
- 4
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Frontier Airlines.
Frontier on ATL to LAS draws a D. Roughly one flight in three arrives at least 15 minutes late, and the typical late arrival is an hour and a half behind schedule. Build slack into anything you connect to. That rests on 562 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 3,329 at 77.3% on time.
The national on-time rate over the same period is 77.6%, so Frontier on ATL to LAS runs 14 points behind the country as a whole. Across a thousand flights that is about 143 extra late arrivals.
Key figures
On time
63.3%
Arrivals under 15 minutes late, of 545 completed flights
Avg delay
88 min
Across delayed arrivals only, not all flights
Cancelled
2.31%
National rate is 1.81%
Whole route
75.9%
Every carrier on ATL to LAS, 4,796 flights
These figures cover 562 flights between July 2025 and June 2026. Beyond the headline rate, 16.7% 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 ATL to LAS
Frontier flew 562 of the 4,796 flights on ATL to LAS, about 12% of it. Its 63.3% on time is 13 points worse than the route as a whole, which runs 75.9%. Ranked by on-time rate it is last of four carriers on the route, where the range runs from Spirit at 82.2% to Frontier at 63.3%. 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 |
|---|---|---|---|---|---|
| Spirit Airlinesthin sample | 186 | 82.2% | 68 min | 0.54% | B+ |
| Delta Air Lines | 3,329 | 77.3% | 55 min | 0.60% | B+ |
| Southwest Airlines | 719 | 77.2% | 48 min | 0.42% | B+ |
| Frontier Airlines (this page) | 562 | 63.3% | 88 min | 2.31% | D |
No carrier stands out. Delta tops the table at 77.3%, half a point clear of the bottom, which is inside the range this kind of sample moves year to year.
Flight by flight
Frontier flight numbers on ATL to LAS
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 562 flights.
- 5am–8am11 flights—
- 8am–11am97 flights65.2%
- 11am–2pm86 flights61.6%
- 2pm–5pm63 flights67.2%
- 5pm–8pm128 flights62.6%
- 8pm–5am177 flights61.0%
Scale runs 55% to 75%. Rows with fewer than 30 flights show a dash.
The best window here is not the first bank but the 2pm–5pm slot at 67.2% on time, ahead of 8pm–5am at 61.0%. Where the curve peaks mid-day rather than at dawn, the constraint is usually congestion at one end rather than the aircraft's own rotation. The 8pm–5am window is the busiest, with 177 flights scheduled in it.
Across the year
Frontier on ATL to LAS through the year
June is the worst month at 51.7% on time, 24 points below February, the best at 76.1%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. May was the busiest month here, with 61 flights.
Across the week, Wednesday is the strongest day at 69.2% on time and Monday the weakest at 48.9%. 20 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 50% 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.
- 50%Late-arriving aircraft
- 42%Carrier
- 8%National Airspace System
- 1%Extreme weather
50% 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 50 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 17,495 reported delay minutes.
The largest share of delay minutes, 42%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 7,316 of the 17,000 delay minutes reported here.
Cancellations sit at 2.31% against a national 1.81%, which is ordinary. Diversions add another 0.71%.
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. 16.7% 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 1,747 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.
The return leg is a different operation and performs like one: it runs 74.5% on time across 561 flights, 11 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 11 points of difference.
One caution: this is a thin sample. 562 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 ATL to LAS
Put together: treat all of this as provisional. 562 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 63.3% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 545 completed flights over 12 months sit behind that.
Related
Where to go next
- ATL to LAS, every carrier
- Frontier on LAS to ATL, the return leg
- Spirit Airlines on ATL to LAS82.2%
- Delta Air Lines on ATL to LAS77.3%
- Southwest Airlines on ATL to LAS77.2%
- Frontier Airlines network-wide record
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Harry Reid International (LAS) 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.