Carrier route record
F9LAS→ATL
Frontier Airlines · Las Vegas to Atlanta
- Flights
- 561
- 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 LAS to ATL sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 561 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 3,327 at 87.7% on time.
The US average over the same twelve months is 77.6%, so there is little to separate Frontier on LAS to ATL from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
74.5%
Arrivals under 15 minutes late, of 548 completed flights
Avg delay
70 min
Across delayed arrivals only, not all flights
Cancelled
2.14%
National rate is 1.81%
Whole route
85.2%
Every carrier on LAS to ATL, 4,791 flights
These figures cover 561 flights between July 2025 and June 2026. Beyond the headline rate, 8.8% 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 ATL
Frontier flew 561 of the 4,791 flights on LAS to ATL, about 12% of it. Its 74.5% on time is 11 points worse than the route as a whole, which runs 85.2%. Ranked by on-time rate it is last of four carriers on the route, where the range runs from Delta at 87.7% to Frontier at 74.5%. One 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 |
|---|---|---|---|---|---|
| Delta Air Lines | 3,327 | 87.7% | 83 min | 0.72% | A+ |
| Southwest Airlines | 720 | 82.9% | 39 min | 0.69% | B+ |
| Spirit Airlinesthin sample | 183 | 82.3% | 69 min | 0.55% | B+ |
| Frontier Airlines (this page) | 561 | 74.5% | 70 min | 2.14% | C |
No carrier stands out. Delta tops the table at 87.7%, 5 points clear of the bottom, which is inside the range this kind of sample moves year to year.
Flight by flight
Frontier flight numbers on LAS to ATL
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 17 points, against 5 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am111 flights87.7%
- 8am–11am7 flights—
- 11am–2pm124 flights70.7%
- 2pm–5pm2 flights—
- 5pm–8pm—
- 8pm–5am317 flights71.6%
Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.
The weak window here is the middle of the day, not the evening: 11am–2pm runs 70.7% on time against 87.7% for 5am–8am. That shape usually means a departure bank rather than an accumulating delay, so the recovery later in the afternoon is real rather than noise. The 8pm–5am window is the busiest, with 317 flights scheduled in it.
Across the year
Frontier on LAS to ATL through the year
July is the worst month at 51.1% on time, 35 points below November, the best at 86.5%. 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 62 flights.
Across the week, Wednesday is the strongest day at 86.6% on time and Sunday the weakest at 64.0%. 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 42% of the 9,734 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.
- 42%Late-arriving aircraft
- 38%Carrier
- 18%National Airspace System
- 2%Extreme weather
42% 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 9,734 reported delay minutes here, that single category outweighs weather by 23 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 9,734 reported delay minutes.
The largest share of delay minutes, 38%, 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 3,695 of the 9,734 delay minutes reported here.
Cancellations sit at 2.14% against a national 1.81%, which is ordinary. Diversions add another 0.18%.
Connections and stage length
What a delay here costs
8.8% 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.
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 63.3% on time across 562 flights, 11 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 11 points of difference.
One caution: this is a thin sample. 561 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 ATL
Put together: treat all of this as provisional. 561 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 74.5% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 548 completed flights over 12 months sit behind that.
Related
Where to go next
- LAS to ATL, every carrier
- Frontier on ATL to LAS, the return leg
- Delta Air Lines on LAS to ATL87.7%
- Southwest Airlines on LAS to ATL82.9%
- Spirit Airlines on LAS to ATL82.3%
- Frontier Airlines network-wide record
- Harry Reid International (LAS) delay statistics
- Hartsfield-Jackson Atlanta International (ATL) 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.