Historical on-time performance
Las Vegas to Des Moines
1,216 miData through Dec 2025Source: US DOT · BTS
Flights on LAS–DSM arrive on time 77% of the time over the last 12 months.
On-time rate77%arrived within 15 min
p90 delay25 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-time77%Medianon timep9025 minCancel0.6%Flights337
Why flights run late
Delay causes
- Airline34%
- Weather0%
- Air traffic (NAS)15%
- Late aircraft51%
- Security0%
Most delay minutes here are attributed to Late aircraft.
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 (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 85% on time.
- Mornings85% on time · p90 20 min · 222 flights
- Middays78% on time · p90 30 min · 901 flights
- Afternoons67% on time · p90 70 min · 186 flights · limited
- Evenings58% on time · p90 90 min · 272 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 69% to 85% on time.
- Tuesdays85% on time · p90 20 min · 128 flights · limited
- Wednesdays82% on time · p90 25 min · 155 flights · limited
- Saturdays77% on time · p90 40 min · 154 flights · limited
- Mondays75% on time · p90 35 min · 274 flights
- Thursdays72% on time · p90 45 min · 279 flights
- Fridays69% on time · p90 60 min · 275 flights
- Sundays69% on time · p90 45 min · 316 flights
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