76% of flights leaving Las Vegas (LAS) arrived on time over the past 12 months, right at the national average of 76%. That ranks 52 of 76 large U.S. airports. About 477 flights leave LAS on a typical day; 0.9% were cancelled. 73% pushed back from the gate on time, so most of the lateness is already there when the flight leaves the gate.
At a glance
- Best hour to fly: 5 a.m. (94% on time). Worst: 6 p.m. (63%).
- Best month: November (83%). Worst: July (68%).
- Most reliable airline here: Spirit Airlines (83%), vs Southwest Airlines at 73%.
- Biggest delay cause: late-arriving aircraft (44% of delay minutes).
- Year on year: getting worse (80% → 76%).
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for flights leaving LAS: when a flight was late, it was under 45 minutes late 58% of the time. About 1 in 15 flights landed an hour or more late, and 1 in 97 three hours or more; 0.9% were cancelled outright.
- On time or early76%
- 15–30 min late9.0%
- 30–60 min late7.1%
- 1–2 hours late4.5%
- 2–3 hours late1.3%
- 3+ hours late1.0%
- Diverted0.3%
- Cancelled0.9%
Share of all 173,923 scheduled flights, past 12 months, by arrival time against schedule.
Best time of day to fly out of LAS
Time of day matters more at LAS than almost anything else you control. Flights scheduled to leave at 5 a.m. arrived on time 94% of the time; at 6 p.m. it was 63%, a 30-point gap. Taken together, early departures (5–9 a.m.) ran 88% on time against 65% for the evening bank (5–10 p.m.). Early planes usually start the day at the airport, so they haven't had a chance to pick up delays elsewhere. By evening a late inbound aircraft, a crew running out of duty hours or an afternoon thunderstorm can push one late flight into the next. Cancellations cluster too: 1 a.m. departures were cancelled 1.8% of the time, against 0.9% overall.
Hour × month
Combine the two and the spread is wider still. The most reliable combination at LAS was a 5 a.m. departure in September (95% on time); the least, 9 p.m. in July (52%). If you can only move one thing, move the hour. Departure hour usually shifts the odds more than the month does.
Each cell: on-time rate for that departure hour in that calendar month, 2023–2026. Find your travel month, then look along the row for the greenest hour.
Best and worst months
July is the hardest month at LAS, with 68% of flights on time across 2023–2026; November is the best at 83%. Summer (June–August) runs 8 points worse than autumn: heavy schedules, peak loads and afternoon thunderstorms. Cancellations peak in January (1.8% of flights).
Airlines at LAS
Southwest Airlines runs 50% of departures from LAS. Among airlines with at least 1,000 departures here, Spirit Airlines was the most reliable (83% on time) and Southwest Airlines the least (73%), a 10-point difference. On a route where both fly, that difference is worth more than a small fare gap.
| Airline | Departures | On time | Left on time | Cancelled | Typical arrival |
|---|---|---|---|---|---|
| Southwest Airlines | 86,407 | 73% | 67% | 0.6% | −2 min |
| Delta Air Lines | 17,174 | 83% | 83% | 1.1% | −9 min |
| United Airlines | 15,281 | 79% | 83% | 0.6% | −9 min |
| American Airlines | 14,332 | 79% | 78% | 1.7% | −11 min |
| Frontier Airlines | 13,095 | 74% | 74% | 1.5% | −8 min |
| Alaska Airlines | 10,469 | 73% | 74% | 1.8% | −4 min |
| Allegiant Air | 7,022 | 82% | 84% | 0.4% | −9 min |
| Spirit Airlines | 5,509 | 83% | 83% | 1.9% | −12 min |
| JetBlue | 4,040 | 75% | 74% | 2.4% | −9 min |
| Hawaiian Airlines | 594 | 70% | 70% | 0.3% | +2 min |
Why flights are late at LAS
Airlines report a cause for every flight that arrives 15 or more minutes late. At LAS, 44% of delay minutes came from late-arriving aircraft: the plane showed up late from its previous flight, so the delay started somewhere else. Next is the airlines themselves at 34%. That's why the first flight of the morning is the safest bet: it has no earlier flight to inherit a delay from. Of the 1,643 cancellations, 46% were blamed on weather.
The average taxi from gate to takeoff is 18 minutes, about typical for a large U.S. airport.
Month by month
Over the latest 12 months 76% of LAS departures were on time, against 80% in the 12 months before, a decline of 4 points. The best recent month was February 2026 (82%); the worst, July 2026 (68%).
Worst cancellation days
The worst single day in the past year was Sunday, Jan 25, 2026, when 16% of 496 scheduled departures were cancelled. Days like that are usually a major storm, a system outage or a holiday peak hitting bad weather. No average predicts them, so on a stormy forecast, check your airline's travel waivers.
| Date | Departures | Cancelled | On time |
|---|---|---|---|
| Jan 25, 2026 | 496 | 16% | 64% |
| Jan 24, 2026 | 373 | 12% | 73% |
| Aug 14, 2026 | 496 | 9% | 36% |
| Jan 26, 2026 | 460 | 8% | 71% |
| Sep 26, 2025 | 559 | 8% | 44% |
| Jun 19, 2026 | 507 | 8% | 50% |
| Nov 9, 2025 | 559 | 7% | 58% |
| Mar 16, 2026 | 536 | 7% | 54% |
| Mar 15, 2026 | 526 | 7% | 57% |
| Nov 10, 2025 | 542 | 6% | 42% |
Last flights of the day
The last flight of the day is a different bet. Across routes from LAS, each airline's final departure was cancelled 1.0% of the time, against 0.9% for its earlier flights, about the same. 1.0% of last flights landed 3+ hours late. The riskiest last flight out was Frontier Airlines to Orlando (2.2% cancelled).
| Last flight to | Airline | Leaves | Cancelled | 3h+ late | On time |
|---|---|---|---|---|---|
| MCO Orlando | Frontier Airlines | 9:42 p.m. | 2.2% | 7.2% | 57% |
| IAH Houston | Frontier Airlines | 2:28 p.m. | 4.8% | 3.2% | 60% |
| ORD Chicago | American Airlines | 11:50 p.m. | 2.8% | 3.6% | 68% |
| BOS Boston | JetBlue | 8:50 p.m. | 2.5% | 3.3% | 72% |
| CLE Cleveland | Frontier Airlines | 2:28 p.m. | 1.8% | 3.3% | 71% |
| SFO San Francisco | Frontier Airlines | 6:00 p.m. | 2.9% | 2.3% | 54% |
| JFK New York | JetBlue | 11:59 p.m. | 2.5% | 2.5% | 69% |
| DFW Dallas | American Airlines | 11:59 p.m. | 3.8% | 0.8% | 74% |
| EWR Newark | JetBlue | 9:14 p.m. | 1.9% | 2.6% | 77% |
| ORD Chicago | Southwest Airlines | 5:10 p.m. | 0.0% | 4.4% | 64% |
| SAN San Diego | Alaska Airlines | 7:07 p.m. | 3.0% | 0.8% | 49% |
| DFW Dallas | Frontier Airlines | 2:08 p.m. | 1.8% | 1.8% | 76% |
Each airline's last scheduled departure of the day on a route, on days it flies the route at least twice; past 12 months. Riskiest first.
LAS at the holidays
On the busy Thanksgiving travel days, flights from LAS arrived on time 83% of the time, against 83% normally (−0.3 points; 3rd of the 30 busiest airports). On the busy Christmas–New Year travel days, flights from LAS arrived on time 76% of the time, against 82% normally (−6.8 points; 9th of the 30 busiest airports).
Thanksgiving: best days to fly → · Christmas: best days to fly →
Tips for flying out of LAS
- Book the earliest departure you can live with. At LAS the 5 a.m. flights do best.
- Traveling in July? Leave extra slack for anything that can't move: cruises, weddings, the last connection of the day.
- Choosing between airlines? Spirit Airlines has the better record here.
- Connecting here? See how long a layover you need at LAS.
- Delayed already? Most delays at LAS come from late-arriving aircraft. If your inbound plane is late, your flight will be too, whatever the board says.
Delayed at LAS right now? See how much later LAS delays usually get, and what to do →
Routes from LAS
Where you're going matters too. From LAS, the most reliable busy route was to Charlotte (CLT, 86% on time) and the least reliable to San Francisco (SFO, 58%). Flights into congested airports inherit their delays: an air traffic program at the destination holds planes on the ground here.
Least reliable first. Routes with at least 365 flights a year.
| To | Flights | On time | Cancelled | Typical arrival |
|---|---|---|---|---|
| SFO San Francisco | 6,142 | 58% | 0.8% | +7 min |
| SAN San Diego | 6,482 | 60% | 1.7% | +6 min |
| TPA Tampa | 1,018 | 67% | 0.9% | +4 min |
| SDF Louisville | 399 | 69% | 1.0% | −1 min |
| DAL Dallas | 2,857 | 70% | 1.5% | +1 min |
| ICT Wichita | 473 | 71% | 0.2% | −1 min |
| OAK Oakland | 3,228 | 71% | 0.4% | 0 min |
| PSP Palm Springs | 741 | 72% | 0.9% | 0 min |
| MSY New Orleans | 849 | 72% | 0.5% | +1 min |
| BOI Boise | 1,439 | 72% | 0.6% | −3 min |
| CLE Cleveland | 1,003 | 72% | 1.8% | −3 min |
| IND Indianapolis | 1,369 | 72% | 0.5% | −1 min |
| MKE Milwaukee | 1,032 | 72% | 0.9% | −2 min |
| AUS Austin | 2,865 | 72% | 0.4% | 0 min |
| HOU Houston | 2,020 | 72% | 0.4% | +1 min |
| CMH Columbus | 892 | 72% | 0.9% | −1 min |
| ELP El Paso | 1,348 | 73% | 0.5% | −3 min |
| DCA Washington | 728 | 73% | 1.0% | −5 min |
| BOS Boston | 1,597 | 73% | 1.6% | −7 min |
| MCO Orlando | 1,999 | 73% | 0.5% | −2 min |
| MDW Chicago | 2,274 | 74% | 0.6% | −2 min |
| PIT Pittsburgh | 676 | 74% | 0.6% | −2 min |
| SAT San Antonio | 2,032 | 74% | 0.3% | −1 min |
| ORD Chicago | 5,148 | 74% | 1.2% | −7 min |
| COS Colorado Springs | 865 | 74% | 0.4% | −2 min |
| MCI Kansas City | 2,016 | 74% | 0.6% | −2 min |
| OKC Oklahoma City | 1,236 | 74% | 0.9% | −3 min |
| FLL Fort Lauderdale | 1,042 | 74% | 2.2% | −4 min |
| TUL Tulsa | 741 | 74% | 1.2% | −3 min |
| ONT Ontario | 2,473 | 75% | 0.7% | −5 min |
| ABQ Albuquerque | 1,712 | 75% | 0.5% | −3 min |
| TUS Tucson | 1,320 | 75% | 0.6% | −4 min |
| OMA Omaha | 1,132 | 75% | 0.4% | −3 min |
| STS Santa Rosa | 500 | 75% | 2.0% | −7 min |
| BZN Bozeman | 600 | 76% | 0.3% | −4 min |
| DEN Denver | 7,140 | 76% | 0.8% | −7 min |
| GEG Spokane | 856 | 76% | 0.5% | −2 min |
| MEM Memphis | 547 | 76% | 0.5% | −4 min |
| LGB Long Beach | 2,087 | 76% | 0.4% | −4 min |
| SBA Santa Barbara | 890 | 76% | 1.0% | −5 min |
| PHX Phoenix | 6,012 | 76% | 1.0% | −7 min |
| BNA Nashville | 2,060 | 76% | 0.8% | −2 min |
| FAT Fresno | 1,713 | 77% | 0.6% | −6 min |
| HNL Honolulu | 2,184 | 77% | 0.4% | −3 min |
| LAX Los Angeles | 8,729 | 77% | 0.9% | −6 min |
| JFK New York | 3,717 | 77% | 3.0% | −11 min |
| SMF Sacramento | 4,005 | 77% | 0.5% | −6 min |
| DSM Des Moines | 595 | 77% | 0.3% | −5 min |
| BWI Baltimore | 1,743 | 77% | 1.0% | −4 min |
| DFW Dallas | 5,142 | 78% | 2.5% | −10 min |
| PDX Portland | 2,933 | 78% | 0.7% | −5 min |
| STL St. Louis | 2,101 | 78% | 0.5% | −5 min |
| BUR Burbank | 4,075 | 78% | 1.4% | −8 min |
| SJC San Jose | 3,693 | 78% | 0.4% | −6 min |
| RNO Reno | 4,136 | 78% | 0.9% | −8 min |
| PHL Philadelphia | 1,478 | 79% | 1.4% | −13 min |
| EWR Newark | 2,861 | 79% | 1.8% | −12 min |
| RDU Raleigh | 553 | 79% | 1.3% | −4 min |
| DTW Detroit | 2,765 | 80% | 0.8% | −7 min |
| CVG Cincinnati | 681 | 80% | 1.5% | −8 min |
| SNA Santa Ana | 4,085 | 81% | 0.7% | −7 min |
| PAE Everett | 635 | 81% | 2.1% | −11 min |
| SLC Salt Lake City | 3,724 | 81% | 0.7% | −9 min |
| MAF Midland | 365 | 81% | 0.5% | −5 min |
| SCK Stockton | 398 | 81% | 0.3% | −8 min |
| SEA Seattle | 5,617 | 81% | 1.0% | −9 min |
| MIA Miami | 1,376 | 81% | 0.8% | −10 min |
| ATL Atlanta | 4,755 | 83% | 0.8% | −7 min |
| IAH Houston | 3,411 | 83% | 0.9% | −9 min |
| OGG Kahului | 735 | 83% | 0.8% | −6 min |
| MSP Minneapolis | 2,091 | 84% | 1.0% | −11 min |
| IAD Washington | 1,070 | 84% | 0.7% | −11 min |
| LIH Lihue | 365 | 84% | 0.3% | −9 min |
| BLI Bellingham | 430 | 85% | 1.2% | −11 min |
| KOA Kona | 365 | 85% | 0.3% | −12 min |
| LBB Lubbock | 366 | 85% | 1.1% | −6 min |
| CLT Charlotte | 2,066 | 86% | 0.9% | −15 min |
| EUG Eugene | 472 | 86% | 0.0% | −7 min |
| MFE Mission | 428 | 89% | 0.5% | −10 min |
Flights into LAS
Arriving rather than leaving? These are the routes into Las Vegas Harry Reid, least reliable first. The weakest is from Stockton (66% on time).
| From | Flights | On time | Cancelled |
|---|---|---|---|
| SCK Stockton | 398 | 66% | 0.3% |
| DFW Dallas | 5,138 | 67% | 2.4% |
| DCA Washington | 729 | 68% | 1.5% |
| SFO San Francisco | 6,145 | 70% | 0.7% |
| SAN San Diego | 6,451 | 70% | 2.1% |
| EUG Eugene | 472 | 70% | 0.2% |
| MIA Miami | 1,379 | 71% | 0.8% |
| ORD Chicago | 5,154 | 72% | 1.3% |
| DTW Detroit | 2,768 | 73% | 0.6% |
| AUS Austin | 2,882 | 73% | 0.4% |
| BOS Boston | 1,596 | 73% | 1.4% |
| PHL Philadelphia | 1,475 | 73% | 1.7% |
| DAL Dallas | 2,859 | 74% | 1.2% |
| ATL Atlanta | 4,758 | 74% | 0.8% |
| CLE Cleveland | 1,001 | 74% | 1.8% |
| STL St. Louis | 2,107 | 74% | 0.6% |
| FLL Fort Lauderdale | 1,042 | 74% | 1.7% |
| LAX Los Angeles | 8,729 | 75% | 1.0% |
| DEN Denver | 7,168 | 75% | 0.6% |
| BNA Nashville | 2,035 | 75% | 0.8% |
| MDW Chicago | 2,236 | 75% | 0.9% |
| ONT Ontario | 2,469 | 76% | 0.9% |
| JFK New York | 3,721 | 76% | 2.8% |
| OAK Oakland | 3,264 | 76% | 0.6% |
| PHX Phoenix | 6,017 | 77% | 1.1% |
Showing the 25 least reliable of 79 routes into LAS.
Questions about LAS delays
What is the best time to fly out of LAS?
Flights scheduled at 5 a.m.: over the past year 94% of LAS departures at that hour arrived on time, against 63% at 6 p.m., the worst hour.
What month has the most flight delays at LAS?
July (68% on time). November is the best month (83%).
Which airline is most on time at LAS?
Spirit Airlines: 83% of its LAS departures arrived on time over the past year. Southwest Airlines had the weakest record at 73%.
Why are flights delayed at LAS?
The biggest cause was late-arriving aircraft (44% of delay minutes): the plane showed up late from its previous flight, so the delay started somewhere else. Then the airlines themselves (34%).
How often are flights cancelled at LAS?
0.9% of scheduled departures over the past 12 months, peaking in January at 1.8%.
Hours are scheduled local departure times. "On time" means arriving less than 15 minutes late at the destination; cancelled and diverted flights count as not on time. Method.