Route reliability record
LAS→LAX
Las Vegas to Los Angeles
- Flights
- 8,203
- Period
- September 2025 to August 2026
- Distance
- 236 mi
- Carriers
- 8
This route lands a B+, level with the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 8,203 LAS to LAX flights, of which Spirit Airlines flew 463 at 86.9% on time.
Best time to fly LAS to LAX: a 5am–8am departure, ideally on a Wednesday. Flights in that window arrived on time 90.9% of the time and Wednesday flights 84.7%, against 77.9% for the route overall.
Spirit Airlines is the most reliable of the seven carriers covered here at 86.9% on time across 463 flights.
Key figures
On time
77.9%
Arrivals under 15 minutes late, of 8,143 completed flights
Avg delay
63 min
Across delayed arrivals only, not all flights
Cancelled
0.73%
National rate is 1.89%
Best carrier
Spirit
86.9% on time across 463 flights
These figures cover 8,203 flights between September 2025 and August 2026. The median arrival is 6 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.
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Carrier by carrier
Which airline is most reliable on LAS to LAX
The choice of carrier is not cosmetic here. Spirit Airlines arrives on time 86.9% of the time; Southwest Airlines manages 67.6%. Sample sizes sit next to every figure, because a two-point gap across 2,355 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Spirit Airlines | 463 | 86.9% | 68 min | 1.30% | A |
| United Airlines | 1,576 | 85.6% | 59 min | 0.57% | A+ |
| Delta Air Lines | 1,733 | 83.8% | 76 min | 0.92% | B+ |
| SkyWest Airlines | 405 | 81.5% | 65 min | 1.23% | B |
| Frontier Airlines | 654 | 79.7% | 61 min | 0.46% | B+ |
| American Airlines | 1,000 | 73.6% | 96 min | 0.90% | C+ |
| Alaska Airlinesthin sample | 17 | 70.6% | 30 min | 0.00% | C+ |
| Southwest Airlines | 2,355 | 67.6% | 48 min | 0.51% | C+ |
The spread between Spirit and Southwest is 19 points, wide enough that it should decide the booking. On a hundred trips that is 19 more arrivals inside the on-time window.
Flight by flight
Flights on LAS to LAX
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
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Best ways to make this trip
The most reliable ways to fly Las Vegas to Los Angeles
Every airline on this route and on the routes between nearby airports, ranked by how often a scheduled flight actually operated and arrived on time. 3 of the top 5 use a different airport at one end.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. LAS → SNALas Vegas to Santa Ana | Spirit Airlines | 87.5% | 89.1% | 1.82% | 8pm–5am, Sat | — |
| 2. LAS → SNALas Vegas to Santa Ana | SkyWest Airlines | 86.5% | 87.0% | 0.55% | 2pm–5pm, Wed | OO 4078 08:00 |
| 3. LAS → BURLas Vegas to Burbank | Spirit Airlines | 86.0% | 88.4% | 2.69% | 5am–8am, Tue | — |
| 4. LAS → LAXLas Vegas to Los Angeles | Spirit Airlines | 85.8% | 86.9% | 1.30% | 11am–2pm, Wed | — |
| 5. LAS → LAXLas Vegas to Los Angeles | United Airlines | 85.1% | 85.6% | 0.57% | 5am–8am, Wed | UA 2039 06:00 |
Success is the share of scheduled flights that operated and arrived less than 15 minutes late, so a cancelled flight counts against it. “(route)” means the best time comes from every carrier on the route rather than this airline alone.
Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 28 points, against 19 points between the best and worst carrier.
- 5am–8am1,527 flights90.9%
- 8am–11am1,652 flights86.1%
- 11am–2pm1,182 flights75.7%
- 2pm–5pm1,221 flights70.7%
- 5pm–8pm1,900 flights72.3%
- 8pm–5am721 flights62.6%
Scale runs 55% to 95%.
The 8pm–5am window is where this operation falls apart: 62.6% on time, against 90.9% for the 5am–8am 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 1,900 flights scheduled in it.
Explore
Filter LAS to LAX by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On LAS to LAX, the best departure window is 5am–8am at 90.9% on time and the worst is 8pm–5am at 62.6%, a wide gap of 28.3 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am90.9%
- 8–11am86.1%
- 11am–2pm75.7%
- 2–5pm70.7%
- 5–8pm72.3%
- 8pm–5am62.6%
best all US flightsScale 55% to 95%.
Across the year
When delays peak on this route
Twelve months, one bar each, drawn from the same 8,203 flights. The strip shows how much of this route's record is set by the calendar rather than by the operation.
August is the worst month at 71.5% on time, 11 points below February, the best at 82.8%. 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. January was the busiest month here, with 740 flights.
Across the week, Wednesday is the strongest day at 84.7% on time and Sunday the weakest at 72.6%, a spread of 12 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 51% of the 113,000 delay minutes carriers reported here, and the remaining four split what is left.
- 51%Late-arriving aircraft
- 34%Carrier
- 14%National Airspace System
- 1%Extreme weather
- 0%Security
51% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 113,000 reported delay minutes here, that single category outweighs weather by 46 to one. The split is drawn from 112,919 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 90.9% on time here.
Cancellations are rare at 0.73%, 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.
Connections and stage length
What a delay here actually costs
6.4% 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 about an hour, which a normal layover absorbs.
At 236 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 5am–8am window matters as much as it does.
The return leg runs 75.8% on time across 8,202 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
The sample behind these figures is 8,203 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.
Work out the risk of missing a connection in LAX after this flight
What to do with this
Booking this route
Put together: avoid the 8pm–5am departure. It runs 62.6% on time against 90.9% for the 5am–8am slot, and that 28 points is the largest single thing you control here. Spirit Airlines is the strongest operator if the fares are close. 8,143 completed flights over 12 months sit behind that.
Common questions
LAS to LAX questions
How often is LAS to LAX delayed?
Roughly one flight in five arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 22.1% of the 8,203 flights in this analysis, against 22.7% nationally. Delayed flights are late by about an hour on average.
Which airline is most reliable on LAS to LAX?
Spirit Airlines leads at 86.9% on time across 463 flights. Southwest Airlines is at the other end on 67.6%, a gap of 19 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 LAS to LAX?
The 5am–8am departure window is the strongest at 90.9% on time. The 8pm–5am window is the weakest at 62.6%, 28 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 LAS to LAX?
August is the weakest month at 71.5% on time, compared with 82.8% in February. Across the year that is 11 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
- LAX to LAS — the return legseparate record
- Harry Reid International (LAS) delay statistics
- Los Angeles International (LAX) delay statistics
- Spirit Airlines on LAS to LAX86.9%
- United Airlines on LAS to LAX85.6%
- Delta Air Lines on LAS to LAX83.8%
- SkyWest Airlines on LAS to LAX81.5%
- Frontier Airlines on LAS to LAX79.7%
- American Airlines on LAS to LAX73.6%
- Southwest Airlines on LAS to LAX67.6%
- LAS to DEN, a related route76.5%
- SFO to LAX, a related route70.9%
- LAS to SFO, a related route58.0%
- Spirit Airlines on-time record86.9%
- United Airlines on-time record85.6%
- Delta Air Lines on-time record83.8%
- Why the first flight of the morning is statistically safest
- Same route, different airline: where the carrier you pick matters most
Direction matters. LAS to LAX and LAX to LAS are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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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.