Historical on-time performance
Las Vegas to Des Moines
1,216 miData through May 2026Source: US DOT · BTS
Flights on LAS–DSM arrive on time 78% of the time over the last 12 months.
On-time rate78%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled0.6%of scheduled flights
based on 337 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time78%Medianon timep9030 minCancel0.6%Flights337
Why flights run late
Delay causes
- Airline33%
- Weather0%
- Air traffic (NAS)13%
- Late aircraft53%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather100%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 2 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly LAS → DSM
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 86% on time.
- Mornings86% on time · p90 20 min · 263 flights
- Middays78% on time · p90 30 min · 1,000 flights
- Afternoons66% on time · p90 65 min · 188 flights · limited
- Evenings61% on time · p90 85 min · 236 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 69% to 87% on time.
- Tuesdays87% on time · p90 15 min · 148 flights · limited
- Wednesdays82% on time · p90 25 min · 175 flights · limited
- Saturdays77% on time · p90 50 min · 166 flights · limited
- Mondays76% on time · p90 35 min · 294 flights
- Thursdays74% on time · p90 40 min · 295 flights
- Fridays73% on time · p90 45 min · 298 flights
- Sundays69% on time · p90 45 min · 311 flights
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