Carrier performance at one airport
G4→LAS
Allegiant Air at Harry Reid International
- Departures
- 7,221
- Period
- June 2025 to May 2026
- Routes
- 25
- Rank here
- #2 of 11
Allegiant Air at Las Vegas lands a B+, 6 points better than the national rate of 77.4%. About one flight in six arrive 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 7,221 flights, of which Delta Air Lines flew 15,922 at 85.0% on time.
Measured against the airport rather than the country, Allegiant Air runs 6 points ahead of the 78.2% 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
83.8%
7,164 completed departures
Avg delay
73 min
Across delayed flights only
Cancelled
0.43%
At LAS, this carrier only
Rank here
#2
Of 11 carriers clearing the floor at LAS
These figures cover 7,221 flights between June 2025 and May 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. Delta Air Lines arrives on time 85.0% of the time; Hawaiian Airlines manages 67.9%. Sample sizes sit next to every figure, because a two-point gap across 976 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 15,922 | 85.0% | 77 min | 1.06% | A |
| Allegiant Air (this page) | 7,221 | 83.8% | 73 min | 0.43% | B+ |
| Spirit Airlines | 10,027 | 81.9% | 71 min | 1.34% | B |
| American Airlines | 14,112 | 81.2% | 98 min | 1.82% | B |
| United Airlines | 15,192 | 81.1% | 67 min | 0.68% | B+ |
| SkyWest Airlines | 4,083 | 79.9% | 70 min | 0.96% | B+ |
| Alaska Airlines | 6,643 | 79.3% | 59 min | 1.05% | B |
| JetBlue Airways | 3,865 | 78.1% | 80 min | 1.89% | B |
| Frontier Airlines | 12,015 | 77.5% | 76 min | 1.29% | B |
| Southwest Airlines | 86,362 | 75.1% | 50 min | 0.58% | B+ |
| Hawaiian Airlines | 976 | 67.9% | 77 min | 0.51% | C+ |
The spread between Delta and Hawaiian is 17 points, wide enough that it should decide the booking. On a hundred trips that is 17 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 | 645 | 85.0% | 82 min | 0.47% | A+ |
| LAS to BLI · Bellingham | 456 | 87.6% | 92 min | 1.10% | A |
| LAS to MFE · McAllen | 439 | 88.1% | 66 min | 0.23% | A+ |
| LAS to DSM · Des Moinesthin sample | 230 | 79.2% | 88 min | 0.43% | B+ |
| LAS to GRR · Grand Rapidsthin sample | 219 | 75.6% | 62 min | 0.00% | B+ |
| LAS to FSD · Sioux Fallsthin sample | 179 | 88.2% | 89 min | 0.56% | A+ |
| LAS to ATW · Appletonthin sample | 170 | 83.3% | 73 min | 0.59% | B+ |
| LAS to MFR · Medfordthin sample | 153 | 81.0% | 41 min | 0.00% | B+ |
| LAS to FAR · Fargothin sample | 140 | 87.8% | 47 min | 0.00% | A+ |
| LAS to BIL · Billingsthin sample | 133 | 87.1% | 116 min | 0.00% | A+ |
| LAS to SGF · Springfieldthin sample | 130 | 90.8% | 163 min | 0.00% | A+ |
| LAS to PSC · Pascothin sample | 129 | 84.4% | 78 min | 0.00% | B+ |
| LAS to PIA · Peoriathin sample | 124 | 94.4% | 60 min | 0.00% | A+ |
| LAS to CID · Cedar Rapidsthin sample | 122 | 83.6% | 55 min | 0.00% | B+ |
| LAS to XNA · Bentonvillethin sample | 120 | 95.8% | 41 min | 0.00% | A+ |
| LAS to TYS · Knoxvillethin sample | 118 | 79.7% | 89 min | 0.00% | B+ |
| LAS to BIS · Bismarckthin sample | 117 | 88.9% | 65 min | 0.00% | A+ |
| LAS to MSO · Missoulathin sample | 114 | 78.6% | 54 min | 1.75% | B |
| LAS to IDA · Idaho Fallsthin sample | 113 | 82.3% | 74 min | 0.00% | B+ |
| LAS to RAP · Rapid Citythin sample | 112 | 69.1% | 54 min | 0.00% | C+ |
| LAS to LRD · Laredothin sample | 112 | 83.6% | 66 min | 1.79% | B |
| LAS to GRI · Grand Islandthin sample | 112 | 91.9% | 63 min | 0.00% | A+ |
| LAS to GTF · Great Fallsthin sample | 111 | 90.1% | 41 min | 0.00% | A+ |
| LAS to FCA · Kalispellthin sample | 111 | 90.8% | 37 min | 0.90% | A+ |
| LAS to MOT · Minotthin sample | 111 | 80.9% | 108 min | 0.00% | B+ |
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 19 points, against 17 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am2,055 flights93.8%
- 8am–11am1,150 flights85.9%
- 11am–2pm1,193 flights82.3%
- 2pm–5pm1,861 flights76.4%
- 5pm–8pm742 flights75.3%
- 8pm–5am220 flights77.3%
Scale runs 65% to 100%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 93.8% of the time, against 75.3% for the evening window. That is 19 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on.
Across the year
Seasonal pattern
Delays peak in May, when the on-time rate falls to 77.0%. February is the strongest month at 89.4%. Moving a flexible trip across that boundary buys 12 points.
Delay causes
What holds this operation up
- 43%Carrier
- 24%Late-arriving aircraft
- 18%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 2.3 times the usual weather exposure.
Cancellations are rare at 0.43%, below the national 1.80% 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.
5.6% of arrivals land an hour or more late, close to the national 8.2%. 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 are the a little over an hour kind, which a normal layover absorbs.
The sample behind these figures is 7,221 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 May 77.0%, a swing of 12 points. If the dates move at all, move them out of May before you think about anything else.
Common questions
Allegiant Air at LAS
How often is Allegiant Air at LAS delayed?
About one flight in six arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 16.2% of the 7,221 flights in this analysis, against 22.6% nationally. Delayed flights are late by a little over an hour on average.
Which airline is most reliable on Allegiant Air at LAS?
Delta Air Lines leads at 85.0% on time across 15,922 flights. Hawaiian Airlines is at the other end on 67.9%, a gap of 17 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 93.8% on time. The 5pm–8pm window is the weakest at 75.3%, 19 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 May delays on Allegiant Air at LAS?
May is the weakest month at 77.0% on time, compared with 89.4% in February. Across the year that is 12 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, June 2025 to May 2026. Updated monthly. How this data is collected.