Historical on-time performance
Las Vegas to Houston
1,222 miData through May 2026Source: US DOT · BTS
Flights on LAS–IAH arrive on time 82% of the time over the last 12 months.
On-time rate82%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled0.9%of scheduled flights
based on 3,278 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesbestOn-time84%Medianon timep9025 minCancel0.7%Flights2,606
- Frontier AirlinesOn-time76%Medianon timep9060 minCancel0.0%Flights88
- Spirit AirlinesOn-time75%Medianon timep9050 minCancel2.1%Flights584
Why flights run late
Delay causes
- Airline31%
- Weather5%
- Air traffic (NAS)29%
- Late aircraft35%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline45%
- Weather55%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 31 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 → IAH
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 74% to 88% on time.
- Early mornings88% on time · p90 15 min · 1,277 flights
- Mornings88% on time · p90 15 min · 2,953 flights
- Middays80% on time · p90 30 min · 3,508 flights
- Overnights77% on time · p90 45 min · 481 flights
- Afternoons74% on time · p90 55 min · 1,879 flights
- Evenings74% on time · p90 55 min · 1,639 flights
Best day of week
Wednesdays are the most reliable day to fly this route — 87% on time.
- Wednesdays87% on time · p90 20 min · 1,565 flights
- Saturdays84% on time · p90 25 min · 1,597 flights
- Tuesdays84% on time · p90 25 min · 1,507 flights
- Thursdays79% on time · p90 40 min · 1,743 flights
- Fridays78% on time · p90 40 min · 1,766 flights
- Mondays78% on time · p90 35 min · 1,776 flights
- Sundays77% on time · p90 40 min · 1,783 flights
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