Carrier route record
DLLAX→LAS
Delta Air Lines · Los Angeles to Las Vegas
- Flights
- 1,735
- Period
- July 2025 to June 2026
- Share of route
- 21%
- Carriers
- 8
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Delta Air Lines.
Delta on LAX to LAS lands a B+, about a point better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 1,735 flights. The strongest carrier on the route with a full sample, Spirit Airlines, flew 640 at 84.9% on time.
Spirit Airlines is the most reliable of the five carriers covered here at 84.9% on time across 640 flights.
Key figures
On time
78.5%
Arrivals under 15 minutes late, of 1,721 completed flights
Avg delay
59 min
Across delayed arrivals only, not all flights
Cancelled
0.81%
National rate is 1.81%
Whole route
76.5%
Every carrier on LAX to LAS, 8,319 flights
These figures cover 1,735 flights between July 2025 and June 2026. The median arrival is 7 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.
Carrier by carrier
Delta against every carrier on LAX to LAS
Delta flew 1,735 of the 8,319 flights on LAX to LAS, about 21% of it. Its 78.5% on time is 2 points better than the route as a whole, which runs 76.5%. Ranked by on-time rate it is number four of eight carriers on the route, where the range runs from SkyWest at 87.3% to Alaska at 64.7%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. Spirit Airlines arrives on time 84.9% of the time; American Airlines manages 68.5%. Sample sizes sit next to every figure, because a two-point gap across 1,064 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SkyWest Airlinesthin sample | 311 | 87.3% | 49 min | 1.61% | A |
| Spirit Airlines | 640 | 84.9% | 76 min | 0.94% | B+ |
| United Airlines | 1,572 | 83.6% | 58 min | 0.51% | B+ |
| Delta Air Lines (this page) | 1,735 | 78.5% | 59 min | 0.81% | B+ |
| Southwest Airlines | 2,386 | 72.2% | 53 min | 0.59% | C+ |
| Frontier Airlines | 594 | 70.0% | 79 min | 1.35% | C |
| American Airlines | 1,064 | 68.5% | 87 min | 0.85% | C+ |
| Alaska Airlinesthin sample | 17 | 64.7% | 28 min | 0.00% | D+ |
The spread between Spirit and American is 16 points, wide enough that it should decide the booking. On a hundred trips that is 16 more arrivals inside the on-time window.
Flight by flight
Delta flight numbers on LAX to LAS
Departure window
When Delta runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 29 points, against 16 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am351 flights95.4%
- 8am–11am21 flights—
- 11am–2pm368 flights77.9%
- 2pm–5pm365 flights66.3%
- 5pm–8pm120 flights80.7%
- 8pm–5am510 flights75.1%
Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 95.4% of the time, against 66.3% for the afternoon window. That is 29 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 510 flights scheduled in it.
Across the year
Delta on LAX to LAS through the year
Delays peak in May, when the on-time rate falls to 66.0%. December is the strongest month at 84.6%. Moving a flexible trip across that boundary buys 19 points. January was the busiest month here, with 154 flights.
Across the week, Tuesday is the strongest day at 86.3% on time and Thursday the weakest at 73.3%. 13 points is a smaller lever than departure hour, but it is free.
Delay causes
Why Delta runs late on this route
One category carries most of the weight here. Carrier accounts for 45% of the 22,000 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.
- 45%Carrier
- 27%National Airspace System
- 27%Late-arriving aircraft
- 0%Security
- 0%Extreme weather
The largest share of delay minutes, 45%, 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 9,886 of the 22,000 delay minutes reported here. The split is drawn from 21,857 reported delay minutes.
Cancellations are rare at 0.81%, below the national 1.81% 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 costs
6.4% 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 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 is a different operation and performs like one: it runs 84.0% on time across 1,737 flights, 6 points above 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 6 points of difference.
The sample behind these figures is 1,735 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.
What to do with this
Booking Delta on LAX to LAS
Put together: the calendar is the biggest lever here, not the carrier or the hour. December runs 84.6% on time and May 66.0%, a swing of 19 points. If the dates move at all, move them out of May before you think about anything else. 1,721 completed flights over 12 months sit behind that.
Related
Where to go next
- LAX to LAS, every carrier
- Delta on LAS to LAX, the return leg
- SkyWest Airlines on LAX to LAS87.3%
- Spirit Airlines on LAX to LAS84.9%
- United Airlines on LAX to LAS83.6%
- Southwest Airlines on LAX to LAS72.2%
- Frontier Airlines on LAX to LAS70.0%
- American Airlines on LAX to LAS68.5%
- Delta Air Lines network-wide record
- Los Angeles International (LAX) delay statistics
- Harry Reid International (LAS) delay statistics
- Same route, different airline: where the carrier you pick matters most
- 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.