Historical on-time performance
Las Vegas to Houston
1,222 miData through Dec 2025Source: US DOT · BTS
Flights on LAS–IAH arrive on time 83% of the time over the last 12 months.
On-time rate83%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled0.9%of scheduled flights
based on 3,351 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesbestOn-time85%Medianon timep9025 minCancel0.9%Flights2,607
- Spirit AirlinesOn-time80%Medianon timep9035 minCancel0.8%Flights744
Why flights run late
Delay causes
- Airline27%
- Weather4%
- Air traffic (NAS)29%
- Late aircraft39%
- 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 → IAH
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Early mornings are the most reliable time of day to fly this route — 90% on time.
- Early mornings90% on time · p90 10 min · 1,180 flights
- Mornings87% on time · p90 15 min · 3,029 flights
- Middays78% on time · p90 40 min · 3,719 flights
- Overnights77% on time · p90 45 min · 467 flights
- Afternoons72% on time · p90 60 min · 1,869 flights
- Evenings70% on time · p90 65 min · 1,844 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 76% to 84% on time.
- Saturdays84% on time · p90 25 min · 1,645 flights
- Wednesdays84% on time · p90 30 min · 1,670 flights
- Tuesdays81% on time · p90 35 min · 1,613 flights
- Mondays77% on time · p90 40 min · 1,829 flights
- Fridays77% on time · p90 45 min · 1,799 flights
- Thursdays77% on time · p90 45 min · 1,759 flights
- Sundays76% on time · p90 40 min · 1,793 flights
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