Carrier performance at one airport
G4→LAS
Allegiant Air at Harry Reid International
- Departures
- 7,022
- Period
- September 2025 to August 2026
- Routes
- 25
- Rank here
- #3 of 11
Allegiant Air at Las Vegas lands a B+, 6 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 7,022 flights, of which Spirit Airlines flew 5,509 at 85.0% on time.
Measured against the airport rather than the country, Allegiant Air runs 6 points ahead of the 76.9% weighted average across all carriers at LAS. That is the comparison worth making: every operator here works the same runways, the same airspace and the same weather.
Key figures
On time
83.1%
6,964 completed departures
Avg delay
75 min
Across delayed flights only
Cancelled
0.43%
At LAS, this carrier only
Rank here
#3
Of 11 carriers clearing the floor at LAS
These figures cover 7,022 flights between September 2025 and August 2026. The median arrival is 9 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
Against the competition
Every carrier at LAS, ranked
The choice of carrier is not cosmetic here. Spirit Airlines arrives on time 85.0% of the time; Hawaiian Airlines manages 70.6%. Sample sizes sit next to every figure, because a two-point gap across 594 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Spirit Airlines | 5,509 | 85.0% | 87 min | 1.89% | A |
| Delta Air Lines | 15,583 | 84.4% | 79 min | 1.08% | B |
| Allegiant Air (this page) | 7,022 | 83.1% | 75 min | 0.43% | B+ |
| American Airlines | 14,079 | 80.5% | 98 min | 1.68% | B |
| SkyWest Airlines | 3,247 | 79.5% | 66 min | 0.95% | B+ |
| United Airlines | 15,169 | 79.5% | 71 min | 0.63% | B+ |
| Alaska Airlines | 7,098 | 78.7% | 60 min | 1.01% | B |
| JetBlue Airways | 4,040 | 77.5% | 83 min | 2.40% | B |
| Frontier Airlines | 13,095 | 75.4% | 79 min | 1.46% | B |
| Southwest Airlines | 86,407 | 73.4% | 50 min | 0.60% | C+ |
| Hawaiian Airlines | 594 | 70.6% | 101 min | 0.34% | C+ |
The spread between Spirit and Hawaiian is 14 points, wide enough that it should decide the booking. On a hundred trips that is 14 more arrivals inside the on-time window.
Route by route
Where Allegiant Air flies from LAS
Allegiant Air operates 25 routes out of LAS with enough volume to report. Route records inside one carrier at one airport still spread widely, because a short shuttle and a transcontinental have very different exposure to a late inbound.
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| LAS to FAT · Fresno | 641 | 82.1% | 79 min | 0.62% | B+ |
| LAS to BLI · Bellingham | 430 | 85.8% | 91 min | 1.16% | A |
| LAS to MFE · McAllen | 428 | 89.2% | 49 min | 0.47% | A+ |
| LAS to DSM · Des Moinesthin sample | 230 | 78.0% | 99 min | 0.00% | B+ |
| LAS to GRR · Grand Rapidsthin sample | 205 | 80.8% | 72 min | 0.00% | B+ |
| LAS to FSD · Sioux Fallsthin sample | 176 | 89.1% | 95 min | 0.57% | A+ |
| LAS to ATW · Appletonthin sample | 171 | 81.7% | 71 min | 0.58% | B+ |
| LAS to MFR · Medfordthin sample | 152 | 80.1% | 51 min | 0.00% | B+ |
| LAS to FAR · Fargothin sample | 140 | 87.8% | 50 min | 0.00% | A+ |
| LAS to BIL · Billingsthin sample | 129 | 88.4% | 118 min | 0.00% | A+ |
| LAS to SGF · Springfieldthin sample | 125 | 92.8% | 188 min | 0.00% | A+ |
| LAS to PSC · Pascothin sample | 124 | 82.1% | 74 min | 0.00% | B+ |
| LAS to TYS · Knoxvillethin sample | 118 | 79.7% | 63 min | 0.00% | B+ |
| LAS to BIS · Bismarckthin sample | 116 | 93.1% | 57 min | 0.00% | A+ |
| LAS to PIA · Peoriathin sample | 115 | 93.0% | 57 min | 0.00% | A+ |
| LAS to CID · Cedar Rapidsthin sample | 115 | 79.1% | 52 min | 0.00% | B+ |
| LAS to IDA · Idaho Fallsthin sample | 113 | 75.2% | 64 min | 0.00% | B+ |
| LAS to MSO · Missoulathin sample | 113 | 78.4% | 62 min | 1.77% | B |
| LAS to XNA · Bentonvillethin sample | 112 | 89.2% | 158 min | 0.00% | A+ |
| LAS to MOT · Minotthin sample | 112 | 87.4% | 137 min | 0.00% | A+ |
| LAS to GRI · Grand Islandthin sample | 112 | 81.8% | 84 min | 0.00% | B+ |
| LAS to LRD · Laredothin sample | 111 | 84.4% | 74 min | 1.80% | B |
| LAS to RAP · Rapid Citythin sample | 111 | 68.2% | 57 min | 0.00% | C+ |
| LAS to CVG · Cincinnatithin sample | 109 | 81.1% | 90 min | 0.92% | B+ |
| LAS to ICT · Wichitathin sample | 108 | 66.4% | 64 min | 0.00% | C+ |
Departure window
Best time of day for this operation
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 22 points, against 14 points between the best and worst carrier.
- 5am–8am1,959 flights93.7%
- 8am–11am1,083 flights85.6%
- 11am–2pm1,196 flights81.7%
- 2pm–5pm1,791 flights76.3%
- 5pm–8pm775 flights73.7%
- 8pm–5am218 flights72.1%
Scale runs 65% to 100%.
Book the early departure. Flights leaving between 5am–8am arrive on time 93.7% of the time, against 72.1% for the overnight window. That is 22 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 1,959 flights scheduled in it.
Across the year
Seasonal pattern
August is the worst month at 74.5% on time, 15 points below February, the best at 89.4%. 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. December was the busiest month here, with 717 flights.
Delay causes
What holds this operation up
- 44%Carrier
- 25%Late-arriving aircraft
- 17%National Airspace System
- 14%Extreme weather
- 0%Security
Extreme weather accounts for 14% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.4 times the usual weather exposure. The split is drawn from 88,665 reported delay minutes.
Cancellations are rare at 0.43%, below the national 1.89% 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.
5.7% of arrivals land an hour or more late, close to the national 8.3%, so 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 sample behind these figures is 7,022 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
Put together: the calendar is the biggest lever here, not the carrier or the hour. February runs 89.4% on time and August 74.5%, a swing of 15 points. If the dates move at all, move them out of August before you think about anything else. 6,964 completed flights over 12 months sit behind that.
Common questions
Allegiant Air at LAS
How often is Allegiant Air at LAS delayed?
About one flight in six arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 16.9% of the 7,022 flights in this analysis, against 22.7% nationally. Delayed flights are late by a little over an hour on average.
Which airline is most reliable on Allegiant Air at LAS?
Spirit Airlines leads at 85.0% on time across 5,509 flights. Hawaiian Airlines is at the other end on 70.6%, a gap of 14 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on Allegiant Air at LAS?
The 5am–8am departure window is the strongest at 93.7% on time. The 8pm–5am window is the weakest at 72.1%, 22 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are August delays on Allegiant Air at LAS?
August is the weakest month at 74.5% on time, compared with 89.4% in February. Across the year that is 15 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.