Airport month record
LASAUG
Harry Reid International in August 2026
- Departures
- 13,832
- Month
- August 2026
- National, same month
- 73.1%
- Carriers
- 9
Historical statistics for August 2026, not live status or a forecast for this year’s August. For today’s conditions at LAS, see live FAA status.
LAS in August sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 4 points worse than the national rate of 73.1%. The late ones land a little over an hour behind schedule. That rests on 13,832 flights, of which Delta Air Lines flew 1,214 at 74.5% on time.
Delta Air Lines is the most reliable of the seven carriers covered here at 74.5% on time across 1,214 flights.
Key figures
On time
69.6%
Arrivals under 15 minutes late, of 13,619 completed departures
Avg delay
72 min
Across delayed arrivals only, not all flights
Cancelled
0.95%
Nationally in August: 1.86%
Whole year
76.9%
LAS across all twelve months
These figures cover 13,832 departures from Harry Reid International in August 2026. On time means an arrival less than 15 minutes after the scheduled gate time, the DOT's threshold, and the national comparison uses every US departure in the same month rather than the whole year.
Against the year
August next to LAS's other months
Against LAS's own year, August ran 7 points worse than the twelve-month rate of 76.9%, which makes it the worst of the twelve months in the data.
| Month | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| September 2025 | 14,399 | 78.8% | 66 min | 0.53% | B+ |
| October 2025 | 15,597 | 77.1% | 62 min | 0.31% | B+ |
| November 2025 | 14,443 | 79.5% | 59 min | 1.73% | B |
| December 2025 | 14,547 | 79.9% | 59 min | 0.60% | B+ |
| January 2026 | 13,695 | 83.1% | 65 min | 1.86% | B |
| February 2026 | 12,886 | 83.1% | 58 min | 0.88% | B+ |
| March 2026 | 15,169 | 78.3% | 60 min | 1.15% | B |
| April 2026 | 14,672 | 78.8% | 54 min | 0.40% | B+ |
| May 2026 | 14,585 | 74.1% | 60 min | 0.67% | C+ |
| June 2026 | 13,704 | 70.7% | 61 min | 0.77% | C+ |
| July 2026 | 14,315 | 69.6% | 63 min | 1.01% | C |
| August 2026 (this page) | 13,832 | 69.6% | 72 min | 0.95% | C+ |
Departure window
The best time of day to leave LAS in August
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 38 points, against 10 points between the best and worst carrier.
- 5am–8am2,239 flights89.2%
- 8am–11am2,883 flights81.7%
- 11am–2pm2,462 flights68.3%
- 2pm–5pm2,380 flights56.4%
- 5pm–8pm1,893 flights51.7%
- 8pm–5am1,975 flights63.9%
Scale runs 45% to 95%.
The 5pm–8pm window is where this operation falls apart: 51.7% on time, against 89.2% 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 8am–11am window is the busiest, with 2,883 flights scheduled in it.
Across the week, Tuesday is the strongest day at 81.2% on time and Friday the weakest at 57.6%, a spread of 24 points.
Carrier by carrier
Which airlines ran best at LAS in August
The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 74.5% of the time; Frontier Airlines manages 64.5%. Sample sizes sit next to every figure, because a two-point gap across 1,414 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Southwest Airlines | 7,105 | 69.1% | 57 min | 0.76% | C+ |
| Frontier Airlines | 1,414 | 64.5% | 90 min | 2.33% | D |
| United Airlines | 1,261 | 67.0% | 85 min | 0.56% | C+ |
| Delta Air Lines | 1,214 | 74.5% | 93 min | 0.82% | C+ |
| American Airlines | 1,124 | 72.8% | 106 min | 0.44% | C+ |
| Alaska Airlines | 642 | 72.9% | 64 min | 1.09% | C |
| Allegiant Air | 555 | 74.5% | 83 min | 0.00% | C+ |
| JetBlue Airwaysthin sample | 305 | 71.5% | 85 min | 5.25% | C− |
| SkyWest Airlinesthin sample | 212 | 64.6% | 60 min | 0.00% | D+ |
Delta leads Frontier by 10 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.
Route by route
Busiest routes out of LAS in August
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| LAS to LAX · Los Angeles | 692 | 71.5% | 79 min | 0.58% | C+ |
| LAS to DEN · Denver | 566 | 62.0% | 101 min | 1.41% | D |
| LAS to SFO · San Francisco | 542 | 43.3% | 68 min | 1.11% | F |
| LAS to SEA · Seattle | 487 | 73.7% | 61 min | 0.82% | C+ |
| LAS to PHX · Phoenix | 459 | 73.6% | 74 min | 1.09% | C |
| LAS to SAN · San Diego | 404 | 40.9% | 53 min | 0.50% | F+ |
| LAS to DFW · Dallas-Fort Worth | 404 | 70.2% | 105 min | 0.74% | C+ |
| LAS to ORD · Chicago | 396 | 63.7% | 97 min | 1.52% | D |
| LAS to ATL · Atlanta | 389 | 76.8% | 110 min | 1.29% | B |
| LAS to RNO · Reno | 369 | 75.0% | 74 min | 1.36% | B |
| LAS to BUR · Burbankthin sample | 343 | 75.8% | 64 min | 1.17% | B |
| LAS to JFK · New Yorkthin sample | 322 | 64.8% | 89 min | 3.73% | D− |
| LAS to SMF · Sacramentothin sample | 314 | 72.3% | 60 min | 0.96% | C+ |
| LAS to SNA · Santa Anathin sample | 307 | 74.3% | 58 min | 0.98% | C+ |
| LAS to OAK · Oaklandthin sample | 295 | 66.0% | 60 min | 0.34% | C+ |
| LAS to SJC · San Josethin sample | 293 | 77.6% | 56 min | 1.02% | B |
| LAS to SLC · Salt Lake Citythin sample | 274 | 72.5% | 62 min | 0.36% | C+ |
| LAS to IAH · Houstonthin sample | 264 | 80.5% | 71 min | 0.76% | B+ |
| LAS to PDX · Portlandthin sample | 252 | 73.6% | 86 min | 0.79% | C+ |
| LAS to DAL · Dallasthin sample | 223 | 71.9% | 50 min | 0.90% | C+ |
| LAS to AUS · Austinthin sample | 212 | 68.4% | 58 min | 0.47% | C+ |
| LAS to EWR · Newarkthin sample | 203 | 67.2% | 86 min | 0.99% | C+ |
| LAS to DTW · Detroitthin sample | 203 | 70.4% | 75 min | 1.97% | C |
| LAS to ONT · Ontariothin sample | 200 | 75.0% | 74 min | 0.00% | B+ |
| LAS to MDW · Chicagothin sample | 190 | 70.2% | 63 min | 0.00% | C+ |
Delay causes
What held LAS up in August
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 297,000 reported delay minutes.
- 41%Late-arriving aircraft
- 33%Carrier
- 23%National Airspace System
- 3%Extreme weather
- 0%Security
41% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 297,000 reported delay minutes here, that single category outweighs weather by 14 to one. The split is drawn from 296,501 reported delay minutes.
Cancellations sit at 0.95% against a national 1.86%, which is ordinary. Diversions add another 0.59%.
11.5% of arrivals land a full hour or more behind schedule, against 10.9% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
What to do with this
Flying from LAS in August
For a August trip through LAS: plan on this being one of the airport's harder months. The 5am–8am departures held up best at 89.2% on time, and with 11.5% of arrivals an hour or more late, a connection here deserves more slack than the same trip in January would.
Related
Where to go next
- Harry Reid International (LAS), the whole year
- LAS in September78.8%
- LAS in October77.1%
- LAS in November79.5%
- LAS in December79.9%
- LAS in January83.1%
- LAS in February83.1%
- LAS in March78.3%
- LAS in April78.8%
- LAS in May74.1%
- LAS in June70.7%
- LAS in July69.6%
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.