Carrier performance at one airport
DL→LAS
Delta Air Lines at Harry Reid International
- Departures
- 15,583
- Period
- September 2025 to August 2026
- Routes
- 11
- Rank here
- #2 of 11
Delta Air Lines at Las Vegas earns a B. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 15,583 flights, of which Spirit Airlines flew 5,509 at 85.0% on time.
Measured against the airport rather than the country, Delta Air Lines runs 8 points ahead of the 76.9% 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
84.4%
15,364 completed departures
Avg delay
79 min
Across delayed flights only
Cancelled
1.08%
At LAS, this carrier only
Rank here
#2
Of 11 carriers clearing the floor at LAS
These figures cover 16,000 flights between September 2025 and August 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. Spirit Airlines arrives on time 85.0% of the time; Hawaiian Airlines manages 70.6%. Sample sizes sit next to every figure, because a two-point gap across 594 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Spirit Airlines | 5,509 | 85.0% | 87 min | 1.89% | A |
| Delta Air Lines (this page) | 15,583 | 84.4% | 79 min | 1.08% | B |
| Allegiant Air | 7,022 | 83.1% | 75 min | 0.43% | B+ |
| American Airlines | 14,079 | 80.5% | 98 min | 1.68% | B |
| SkyWest Airlines | 3,247 | 79.5% | 66 min | 0.95% | B+ |
| United Airlines | 15,169 | 79.5% | 71 min | 0.63% | B+ |
| Alaska Airlines | 7,098 | 78.7% | 60 min | 1.01% | B |
| JetBlue Airways | 4,040 | 77.5% | 83 min | 2.40% | B |
| Frontier Airlines | 13,095 | 75.4% | 79 min | 1.46% | B |
| Southwest Airlines | 86,407 | 73.4% | 50 min | 0.60% | C+ |
| Hawaiian Airlines | 594 | 70.6% | 101 min | 0.34% | C+ |
The spread between Spirit and Hawaiian 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.
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 | 3,323 | 85.7% | 85 min | 0.84% | A+ |
| LAS to MSP · Minneapolis | 1,956 | 86.2% | 87 min | 1.02% | A |
| LAS to DTW · Detroit | 1,877 | 83.8% | 74 min | 0.64% | B+ |
| LAS to SEA · Seattle | 1,748 | 87.2% | 90 min | 1.09% | A |
| LAS to LAX · Los Angeles | 1,733 | 83.8% | 76 min | 0.92% | B+ |
| LAS to SLC · Salt Lake City | 1,715 | 84.9% | 73 min | 0.64% | B+ |
| LAS to JFK · New York | 1,676 | 82.9% | 73 min | 2.80% | B |
| LAS to BOS · Boston | 551 | 73.7% | 77 min | 1.45% | C |
| LAS to AUS · Austin | 365 | 69.0% | 77 min | 0.55% | C+ |
| LAS to CVG · Cincinnatithin sample | 356 | 88.4% | 50 min | 0.84% | A+ |
| LAS to RDU · Raleighthin sample | 271 | 88.1% | 42 min | 1.11% | A |
Flight by flight
Delta Air Lines flight numbers from LAS
13 Delta Air Lines flight numbers leaving LAS flew their main route often enough to have a record of their own. Grouped by destination.
- DL 677to ATL 07:0591.6%
- DL 722to ATL 23:1586.1%
- DL 755to ATL 06:0093.1%
- DL 470to DTW 09:5990.0%
- DL 864to DTW 06:0092.4%
- DL 333to JFK 09:3084.4%
- DL 510to JFK 07:0093.8%
- DL 795to JFK 11:5775.5%
- DL 553to LAX 06:0093.1%
- DL 1282to MSP 06:2092.2%
- DL 822to RDU 22:5988.7%
- DL 2844to SEA 06:0094.7%
- DL 2674to SLC 06:0095.1%
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 16 points, against 14 points between the best and worst carrier.
- 5am–8am2,916 flights93.2%
- 8am–11am2,551 flights87.1%
- 11am–2pm3,346 flights81.7%
- 2pm–5pm2,122 flights80.5%
- 5pm–8pm2,006 flights77.5%
- 8pm–5am2,642 flights83.7%
Scale runs 70% to 100%.
Book the early departure. Flights leaving between 5am–8am arrive on time 93.2% of the time, against 77.5% for the evening window. That is 16 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 11am–2pm window is the busiest, with 3,346 flights scheduled in it.
Across the year
Seasonal pattern
August is the worst month at 74.5% on time, 15 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. March was the busiest month here, with 1,413 flights.
Delay causes
What holds this operation up
- 43%Carrier
- 39%Late-arriving aircraft
- 16%National Airspace System
- 2%Extreme weather
- 0%Security
39% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 189,000 reported delay minutes here, that single category outweighs weather by 18 to one. The split is drawn from 188,697 reported delay minutes.
Cancellations sit at 1.08% against a national 1.89%, which is ordinary. Diversions add another 0.32%.
5.6% 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 a little over an hour, which a normal layover absorbs.
15,583 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: the calendar is the biggest lever here, not the carrier or the hour. April runs 89.5% on time and August 74.5%, a swing of 15 points. If the dates move at all, move them out of August before you think about anything else. 15,364 completed flights over 12 months sit behind that.
Common questions
Delta Air Lines at LAS
How often is Delta Air Lines at LAS delayed?
About one flight in six arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 15.6% of the 15,583 flights in this analysis, against 22.7% nationally. Delayed flights are late by a little over an hour on average.
Which airline is most reliable on Delta Air Lines at LAS?
Spirit Airlines leads at 85.0% on time across 5,509 flights. Hawaiian Airlines is at the other end on 70.6%, 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 Delta Air Lines at LAS?
The 5am–8am departure window is the strongest at 93.2% on time. The 5pm–8pm window is the weakest at 77.5%, 16 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 Delta Air Lines at LAS?
August is the weakest month at 74.5% on time, compared with 89.5% in April. Across the year that is 15 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.