Las Vegas (LAS) to Des Moines (DSM): On-Time Performance
Data through July 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 78% on-time against a national 78%. Morning departures also hold up better than evening ones (85% vs 70%), which matters most in the rough months.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 14 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 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Southwest Airlinesmost reliable | 79% | 10 min | 0.4% | 761 |
| Allegiant Air | 77% | 20 min | 0.6% | 476 |
Monthly on-time trend
Best time to fly from LAS to DSM
Aim for departures around 8 a.m. (90% on-time); avoid 4 p.m. departures (67%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 76% | 15 min |
| Tuesdaybest | 88% | 5 min |
| Wednesday | 85% | 6 min |
| Thursday | 76% | 18 min |
| Friday | 80% | 16 min |
| Saturday | 85% | 10 min |
| Sunday | 68% | 16 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft42%
- Airline operations42%
- National airspace system12%
- Weather4%
Frequently asked questions
- How often are flights from LAS to DSM delayed?
- 22% of LAS–DSM flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 14 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 761 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 8 a.m. have the best record (90% on-time), while departures around 4 p.m. have the worst (67%). 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 22% of the time.
- How often are LAS to DSM flights cancelled?
- 0.5% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, 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 1,237 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.