Las Vegas (LAS) to Des Moines (DSM): On-Time Performance
Data through May 2026
When you fly LAS to DSM matters as much as anything else about the booking: the route swung from 94% on-time in November 2024 to just 49% in July 2024. Across the full period the route averages 77% on-time against a national 78%. Morning departures also hold up better than evening ones (85% vs 68%), which matters most in the rough months.
- On-time
- 77%
- arrived <15 min late
- Avg delay
- 13 min
- completed flights
- Cancelled
- 0.5%
- Flights/day
- 1.6
- last 12 months
- Duration
- 2h 56m
- scheduled
- Distance
- 1,216 mi
Best airline from LAS to DSM
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Southwest Airlinesmost reliable | 79% | 10 min | 0.4% | 730 |
| Allegiant Air | 74% | 19 min | 0.7% | 449 |
Monthly on-time trend
Best time to fly from LAS to DSM
Aim for departures around 7 a.m. (90% on-time); avoid 4 p.m. departures (63%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 76% | 13 min |
| Tuesdaybest | 91% | 5 min |
| Wednesday | 84% | 6 min |
| Thursday | 75% | 19 min |
| Friday | 78% | 13 min |
| Saturday | 83% | 11 min |
| Sunday | 66% | 18 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft48%
- Airline operations35%
- National airspace system15%
- Weather3%
Frequently asked questions
- How often are flights from LAS to DSM delayed?
- 23% of LAS–DSM flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 13 minutes.
- Which airline is most reliable from LAS to DSM?
- Southwest Airlines has the best on-time record on this route at 79%, based on 730 flights. 2 airlines flew LAS–DSM frequently enough to compare in this period.
- What is the best time of day to fly from LAS to DSM?
- Departures around 7 a.m. have the best record (90% on-time), while departures around 4 p.m. have the worst (63%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from LAS to DSM?
- The scheduled LAS–DSM flight time averages 2h 56m over 1,216 miles. Actual arrival times vary — flights on this route land 15+ minutes late 23% of the time.
- How often are LAS to DSM flights cancelled?
- 0.5% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from LAS to DSM?
- July 2024 was the roughest month in this dataset, with only 49% of arrivals on time. The best was November 2024 at 94%. If your dates are flexible, that 45-point gap is worth planning around.
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Based on 1,179 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.