Best Time to Fly LAS to DEN: On-Time Stats by Hour & Airline
Harry Reid International → Denver International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 77.0% of Las Vegas (LAS) to Denver (DEN) flights arrived on time (7,102 scheduled flights). That is 0.6 points below the national average of 77.6%.
United Airlines was the most punctual of the 3 airlines on the route at 84.4%, while Southwest Airlines trailed at 71.0%.
December has been the best month (86% on time) and Friday the weakest day of the week (74%).
0.8% of flights were cancelled, versus 1.8% nationally.
LAS to DEN on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| United Airlines | 84.4% | 66 min | 0.4% | 2,388 |
| Frontier Airlines | 77.8% | 89 min | 1.0% | 1,595 |
| Southwest Airlines | 71.0% | 54 min | 1.0% | 3,119 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly LAS to DEN
On-time arrival % by scheduled departure hour (local time), 14,677 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | 81.2% | 0.6% | 647 |
| 1am–2am | Limited data | 1 | |
| 5am–6am | 96.5% | 0.4% | 758 |
| 6am–7am | 90.5% | 0.4% | 1,382 |
| 7am–8am | 86.7% | 0.4% | 750 |
| 8am–9am | 88.3% | 0.5% | 644 |
| 9am–10am | 88.1% | 0.5% | 1,415 |
| 10am–11am | 85.7% | 1.5% | 327 |
| 11am–12pm | 83.4% | 0.7% | 995 |
| 12pm–1pm | 77.3% | 0.5% | 597 |
| 1pm–2pm | 71.9% | 0.5% | 1,194 |
| 2pm–3pm | 60.8% | 1.1% | 652 |
| 3pm–4pm | 62.0% | 1.0% | 1,025 |
| 4pm–5pm | 70.9% | 0.2% | 1,225 |
| 5pm–6pm | 59.1% | 0.7% | 448 |
| 6pm–7pm | 69.6% | 1.5% | 804 |
| 7pm–8pm | 77.2% | 0.3% | 604 |
| 8pm–9pm | 70.3% | 0.3% | 651 |
| 9pm–10pm | 68.7% | 1.6% | 438 |
| 10pm–11pm | 64.4% | 1.7% | 120 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on LAS to DEN
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 89.3% | +10.0 pts | 0.8% | 265 |
| Christmas & New Year (Dec 20 - Jan 3) | 85.2% | +5.9 pts | 0.4% | 523 |
| Summer peak (Jun 15 - Aug 15) | 67.6% | -11.8 pts | 1.1% | 2,288 |
| All other days | 79.3% | — | 0.6% | 11,601 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).