Route reliability record
LAX→LAS
Los Angeles to Las Vegas
- Flights
- 8,202
- Period
- September 2025 to August 2026
- Distance
- 236 mi
- Carriers
- 8
This route sits in the middle of the pack with a B+. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 8,202 LAX to LAS flights, of which United Airlines flew 1,574 at 83.1% on time.
Best time to fly LAX to LAS: a 5am–8am departure, ideally on a Tuesday. Flights in that window arrived on time 95.3% of the time and Tuesday flights 83.6%, against 75.8% for the route overall.
United Airlines is the most reliable of the seven carriers covered here at 83.1% on time across 1,574 flights.
Key figures
On time
75.8%
Arrivals under 15 minutes late, of 8,138 completed flights
Avg delay
63 min
Across delayed arrivals only, not all flights
Cancelled
0.77%
National rate is 1.89%
Best carrier
United
83.1% on time across 1,574 flights
These figures cover 8,202 flights between September 2025 and August 2026. Beyond the headline rate, 8.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Which airline is most reliable on LAX to LAS
The choice of carrier is not cosmetic here. United Airlines arrives on time 83.1% of the time; American Airlines manages 69.1%. Sample sizes sit next to every figure, because a two-point gap across 1,004 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| United Airlines | 1,574 | 83.1% | 55 min | 0.51% | B+ |
| Spirit Airlines | 457 | 82.9% | 79 min | 1.31% | B |
| SkyWest Airlines | 404 | 81.7% | 49 min | 1.24% | B |
| Delta Air Lines | 1,731 | 78.5% | 59 min | 0.81% | B+ |
| Frontier Airlines | 655 | 73.0% | 81 min | 1.07% | C |
| Southwest Airlines | 2,360 | 70.3% | 53 min | 0.68% | C+ |
| American Airlines | 1,004 | 69.1% | 85 min | 0.70% | C+ |
| Alaska Airlinesthin sample | 17 | 64.7% | 28 min | 0.00% | D+ |
The spread between United and American 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.
Flight by flight
Flights on LAX to LAS
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 Los Angeles to Las Vegas
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. SNA → LASSanta Ana to Las Vegas | Spirit Airlines | 88.1% | 89.9% | 1.98% | 5am–8am, Sat | — |
| 2. SNA → LASSanta Ana to Las Vegas | SkyWest Airlines | 85.9% | 86.5% | 0.69% | 11am–2pm, Wed | OO 4078 09:59 |
| 3. LAX → LASLos Angeles to Las Vegas | United Airlines | 82.7% | 83.1% | 0.51% | 8am–11am, Wed | UA 1006 08:15 |
| 4. LAX → LASLos Angeles to Las Vegas | Spirit Airlines | 81.8% | 82.9% | 1.31% | 5am–8am, Wed | — |
| 5. BUR → LASBurbank to Las Vegas | Spirit Airlines | 81.4% | 84.0% | 3.13% | 2pm–5pm, Tue | — |
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 26 points, against 14 points between the best and worst carrier.
- 5am–8am834 flights95.3%
- 8am–11am1,449 flights85.4%
- 11am–2pm1,499 flights72.6%
- 2pm–5pm1,564 flights69.5%
- 5pm–8pm1,220 flights70.2%
- 8pm–5am1,636 flights70.6%
Scale runs 60% to 100%.
Book the early departure. Flights leaving between 5am–8am arrive on time 95.3% of the time, against 69.5% for the afternoon window. That is 26 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8pm–5am window is the busiest, with 1,636 flights scheduled in it.
Explore
Filter LAX to LAS 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 LAX to LAS, the best departure window is 5am–8am at 95.3% on time and the worst is 2pm–5pm at 69.5%, a wide gap of 25.8 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am95.3%
- 8–11am85.4%
- 11am–2pm72.6%
- 2–5pm69.5%
- 5–8pm70.2%
- 8pm–5am70.6%
best all US flightsScale 60% to 100%.
Across the year
When delays peak on this route
Twelve months, one bar each, drawn from the same 8,202 flights. The strip shows how much of this route's record is set by the calendar rather than by the operation.
June is the worst month at 69.7% on time, 10 points below February, the best at 79.6%. 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 743 flights.
Across the week, Tuesday is the strongest day at 83.6% on time and Friday the weakest at 68.8%, a spread of 15 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 45% of the 124,000 delay minutes carriers reported here, and the remaining four split what is left.
- 45%Late-arriving aircraft
- 27%National Airspace System
- 27%Carrier
- 1%Extreme weather
- 0%Security
45% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 124,000 reported delay minutes here, that single category outweighs weather by 45 to one. The split is drawn from 123,852 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 95.3% on time here.
Cancellations are rare at 0.77%, 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
8.2% 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 77.9% on time across 8,203 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 8,202 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 LAS after this flight
What to do with this
Booking this route
Put together: take the 5am–8am departure, avoid June if the dates are flexible, and if two carriers are within a few dollars of each other, United is the one with the record behind it. None of that guarantees an on-time arrival; it moves the odds by 26 points, which is the most any booking decision can do. 8,138 completed flights over 12 months sit behind that.
Common questions
LAX to LAS questions
How often is LAX to LAS delayed?
About one flight in four arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 24.2% of the 8,202 flights in this analysis, against 22.7% nationally. Delayed flights are late by about an hour on average.
Which airline is most reliable on LAX to LAS?
United Airlines leads at 83.1% on time across 1,574 flights. American Airlines is at the other end on 69.1%, 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 LAX to LAS?
The 5am–8am departure window is the strongest at 95.3% on time. The 2pm–5pm window is the weakest at 69.5%, 26 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 June delays on LAX to LAS?
June is the weakest month at 69.7% on time, compared with 79.6% in February. Across the year that is 10 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
- LAS to LAX — the return legseparate record
- Los Angeles International (LAX) delay statistics
- Harry Reid International (LAS) delay statistics
- United Airlines on LAX to LAS83.1%
- Spirit Airlines on LAX to LAS82.9%
- SkyWest Airlines on LAX to LAS81.7%
- Delta Air Lines on LAX to LAS78.5%
- Frontier Airlines on LAX to LAS73.0%
- Southwest Airlines on LAX to LAS70.3%
- American Airlines on LAX to LAS69.1%
- LAX to SFO, a related route60.1%
- DEN to LAS, a related route75.5%
- LAX to JFK, a related route77.5%
- United Airlines on-time record83.1%
- Spirit Airlines on-time record82.9%
- SkyWest Airlines on-time record81.7%
- Why the first flight of the morning is statistically safest
- Same route, different airline: where the carrier you pick matters most
Direction matters. LAX to LAS and LAS to LAX 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.