LAS (Las Vegas) to IAH (Houston) flights arrive on time 82% of the time. The most reliable airline on this route is United Airlines at 86%. The average delay is 68 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated March 2026.LAS → IAH
LAS (Las Vegas) to IAH (Houston)
LAS → IAH on-time performance by month
24
25
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is on time most of the time. About 82% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
United Airlines edges out Southwest Airlines on this route — 86% vs 75% on time.
Airline Comparison
United Airlines leads at 86% on time; Southwest Airlines trails at 75%.
Accurate?
Good to know
Departing from LAS
77% on timeExpect ~17 min sitting on the taxiway after your gate pushes back. LAS has long runway queues.
TSA is currently ~11 min. Best time: 4 AM (about 5 min).
Arriving at IAH
80% on timeWhen flights into IAH are late, the average delay is 75 minutes. Build buffer if you have ground plans.
If connecting at IAH: TSA is ~11 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what United Airlines owes you — refund rights, action plan, complaint email. Free.
Free flight briefing
Know before you go
Flying LAS → IAH? We'll brief you before takeoff.
Delay riskDOT stats + live data
TSA waitCurrent checkpoint lines
WeatherBoth airports
Gate & terminalLive updates
Know someone flying soon?
Send them the link — delay data, TSA waits, weather, all free.
Data last updated March 2026. Source: Bureau of Transportation Statistics.