Historical on-time performance
Houston to Las Vegas
Flights on IAH–LAS arrive on time 82% of the time over the last 12 months.
based on 3,281 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- United AirlinesOn-time83%Medianon timep9030 minCancel0.5%Flights2,607
- Spirit AirlinesOn-time80%Medianon timep9045 minCancel1.7%Flights585
- Frontier AirlinesOn-time66%Medianon timep90100 minCancel1.1%Flights89
Why flights run late
Delay causes
- Airline32%
- Weather7%
- Air traffic (NAS)23%
- Late aircraft38%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline33%
- Weather67%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 24 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 IAH → 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 · 3,333 flights
- Middays80% on time · p90 40 min · 1,784 flights
- Afternoons78% on time · p90 45 min · 2,339 flights
- Overnights72% on time · p90 60 min · 2,323 flights
- Evenings71% on time · p90 65 min · 1,946 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 84% on time.
- Wednesdays84% on time · p90 25 min · 1,577 flights
- Tuesdays82% on time · p90 35 min · 1,498 flights
- Saturdays82% on time · p90 30 min · 1,599 flights
- Sundays77% on time · p90 45 min · 1,772 flights
- Thursdays76% on time · p90 50 min · 1,752 flights
- Mondays76% on time · p90 45 min · 1,750 flights
- Fridays75% on time · p90 65 min · 1,777 flights
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