Carrier performance at one airport
DL→LAS
Delta Air Lines at Harry Reid International
- Departures
- 15,922
- Period
- June 2025 to May 2026
- Routes
- 11
- Rank here
- #1 of 11
Delta Air Lines at Las Vegas earns a A. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.4%. When something does go wrong the average delay runs a little over an hour. That rests on 15,922 flights, of which Delta Air Lines flew 15,922 at 85.0% on time.
Measured against the airport rather than the country, Delta Air Lines runs 7 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
85.0%
15,713 completed departures
Avg delay
77 min
Across delayed flights only
Cancelled
1.06%
At LAS, this carrier only
Rank here
#1
Of 11 carriers clearing the floor at LAS
These figures cover 16,000 flights between June 2025 and May 2026. The median arrival is 10 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 (this page) | 15,922 | 85.0% | 77 min | 1.06% | A |
| Allegiant Air | 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 Delta Air Lines flies from LAS
Delta Air Lines operates 11 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 ATL · Atlanta | 3,356 | 86.4% | 83 min | 0.95% | A+ |
| LAS to MSP · Minneapolis | 2,057 | 88.0% | 84 min | 1.07% | A |
| LAS to DTW · Detroit | 1,927 | 84.4% | 77 min | 0.52% | B+ |
| LAS to LAX · Los Angeles | 1,738 | 83.2% | 67 min | 0.86% | B+ |
| LAS to SEA · Seattle | 1,735 | 87.9% | 87 min | 0.98% | A+ |
| LAS to SLC · Salt Lake City | 1,711 | 85.9% | 71 min | 0.58% | A+ |
| LAS to JFK · New York | 1,682 | 82.8% | 81 min | 2.50% | B |
| LAS to BOS · Boston | 622 | 75.7% | 73 min | 1.45% | B |
| LAS to AUS · Austin | 365 | 66.9% | 75 min | 0.82% | C+ |
| LAS to RDU · Raleighthin sample | 361 | 88.5% | 40 min | 0.83% | A+ |
| LAS to CVG · Cincinnatithin sample | 356 | 88.9% | 46 min | 1.69% | A |
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 18 points, against 17 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am2,916 flights94.5%
- 8am–11am2,564 flights87.9%
- 11am–2pm3,223 flights82.8%
- 2pm–5pm2,287 flights81.8%
- 5pm–8pm2,010 flights77.0%
- 8pm–5am2,922 flights83.2%
Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 94.5% of the time, against 77.0% for the evening window. That is 18 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
June is the worst month at 79.1% on time, 10 points below April, the best at 89.5%. 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.
Delay causes
What holds this operation up
- 42%Carrier
- 40%Late-arriving aircraft
- 16%National Airspace System
- 2%Extreme weather
- 0%Security
40% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 181,000 reported delay minutes here, that single category outweighs weather by 17 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit.
Cancellations sit at 1.06% against a national 1.80%, which is ordinary. Diversions add another 0.25%.
5.3% 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.
15,922 flights sit behind these numbers, which is a large enough sample that the headline rate is not moving on noise. Where a sub-group falls below 30 flights the site shows a dash instead of a percentage.
Put together: avoid the 5pm–8pm departure. It runs 77.0% on time against 94.5% for the 5am–8am slot, and that 18 points is the largest single thing you control here. Delta Air Lines is the strongest operator if the fares are close.
Common questions
Delta Air Lines at LAS
How often is Delta Air Lines at LAS delayed?
About one flight in seven arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 15.0% of the 15,922 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 Delta Air Lines 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 Delta Air Lines at LAS?
The 5am–8am departure window is the strongest at 94.5% on time. The 5pm–8pm window is the weakest at 77.0%, 18 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 Delta Air Lines at LAS?
June is the weakest month at 79.1% on time, compared with 89.5% in April. 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
Source: US DOT Bureau of Transportation Statistics, on-time performance data, June 2025 to May 2026. Updated monthly. How this data is collected.