Historical on-time performance
Chicago to Las Vegas
1,521 miData through May 2026Source: US DOT · BTS
Flights on MDW–LAS arrive on time 76% of the time over the last 12 months.
On-time rate76%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.9%of scheduled flights
based on 2,388 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time76%Medianon timep9040 minCancel0.9%Flights2,388
Why flights run late
Delay causes
- Airline33%
- Weather3%
- Air traffic (NAS)18%
- Late aircraft45%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline18%
- Weather68%
- Air traffic (NAS)14%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 22 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 MDW → LAS
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 — 88% on time.
- Mornings88% on time · p90 15 min · 2,820 flights
- Middays77% on time · p90 35 min · 1,840 flights
- Afternoons69% on time · p90 55 min · 1,216 flights
- Evenings67% on time · p90 55 min · 1,314 flights
- Overnights62% on time · p90 65 min · 1,452 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 79% on time.
- Wednesdays79% on time · p90 35 min · 1,217 flights
- Tuesdays77% on time · p90 35 min · 1,222 flights
- Saturdays77% on time · p90 35 min · 869 flights
- Mondays77% on time · p90 40 min · 1,350 flights
- Thursdays73% on time · p90 45 min · 1,341 flights
- Sundays73% on time · p90 50 min · 1,290 flights
- Fridays72% on time · p90 45 min · 1,353 flights
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