Best Time to Fly DSM to LAS: On-Time Stats by Hour & Airline
Des Moines International → Harry Reid International
Data through July 2026 · Last updated October 18, 2026
595 flights were scheduled from Des Moines (DSM) to Las Vegas (LAS) in the last 12 months, and 80.9% of those that flew arrived on time, 3.3 points above the US average of 77.6%.
Southwest Airlines was the most punctual of the 2 airlines on the route at 84.6%, while Allegiant Air trailed at 75.1%.
October has been the best month (91% on time) and Sunday the weakest day of the week (76%).
0.2% of flights were cancelled, versus 1.8% nationally.
DSM to LAS 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 |
|---|---|---|---|---|
| Southwest Airlines | 84.6% | 58 min | 0.3% | 365 |
| Allegiant Air | 75.1% | 136 min | 0.0% | 230 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DSM to LAS
On-time arrival % by scheduled departure hour (local time), 1,189 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 14 | |
| 7am–8am | 95.0% | 0.0% | 40 |
| 8am–9am | 76.9% | 0.0% | 53 |
| 9am–10am | Limited data | 6 | |
| 10am–11am | Limited data | 1 | |
| 11am–12pm | 89.3% | 0.5% | 197 |
| 12pm–1pm | 86.9% | 0.0% | 352 |
| 1pm–2pm | 80.7% | 0.0% | 88 |
| 2pm–3pm | 85.7% | 0.7% | 148 |
| 3pm–4pm | 71.2% | 0.7% | 148 |
| 4pm–5pm | 80.0% | 0.0% | 45 |
| 6pm–7pm | Limited data | 4 | |
| 7pm–8pm | Limited data | 7 | |
| 8pm–9pm | Limited data | 24 | |
| 9pm–10pm | 74.2% | 0.0% | 31 |
| 10pm–11pm | 58.1% | 0.0% | 31 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DSM to LAS
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) | Limited data | 22 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 63.5% | -20.3 pts | 0.0% | 52 |
| Summer peak (Jun 15 - Aug 15) | 79.9% | -3.9 pts | 0.9% | 211 |
| All other days | 83.8% | — | 0.3% | 904 |
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).