BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
LAS→IAH

Las Vegas, NV (LAS) to Houston, TX (IAH) flight delay odds

82.8% of 3,455 official scheduled LAS-to-IAH flights arrived on time; 10.2% arrived at least 30 minutes late and 0.9% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALLower disruption
82.8%arrived on time
10.2%30+ min late
0.9%cancelled
3,455scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.4%all scheduled flights
120+ minutes late2.6%all scheduled flights
Diverted0.4%did not reach as scheduled
Average arrival+2.8 mincompleted flights

Which departure time was most reliable for LAS to IAH?

Among qualifying LAS-to-IAH departure window results, Early morning had the highest on-time rate: 90.3% of 815 flights. Afternoon was lowest at 75.9% across 1,151 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning81590.3%4.5%1.2%
Late morning66083.9%8.6%0.8%
Afternoon1,15175.9%15.6%0.1%
Evening22978.2%15.3%1.3%
Night60086.2%7.5%2.2%

Which weekday was most reliable for LAS to IAH?

Among qualifying LAS-to-IAH weekday results, Wednesday had the highest on-time rate: 87.9% of 438 flights. Friday was lowest at 79.2% across 524 flights.

DayFlightsOn time30+ minCancelled
Monday53179.7%11.7%1.1%
Tuesday43184.0%10.0%0.5%
Wednesday43887.9%7.8%0.5%
Thursday52083.5%10.6%0.4%
Friday52479.2%12.6%1.1%
Saturday47384.6%8.9%0.8%
Sunday53882.0%9.5%1.9%

Which airline was most reliable for LAS to IAH?

Among qualifying LAS-to-IAH airline results, United Airlines had the highest on-time rate: 84.7% of 2,601 flights. Spirit Airlines was lowest at 75.7% across 526 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines2,60184.7%9.2%0.6%
Spirit Airlines52675.7%13.9%2.5%
Frontier Airlines32879.3%12.8%1.2%

Which month was most reliable for LAS to IAH?

Among qualifying LAS-to-IAH month results, December 2025 had the highest on-time rate: 91.6% of 309 flights. March 2026 was lowest at 75.5% across 323 flights.

MonthFlightsOn time30+ minCancelled
July 202528776.0%12.5%2.1%
August 202528577.2%11.6%1.4%
September 202525585.5%8.2%0.0%
October 202529287.3%7.5%0.0%
November 202531281.4%11.9%0.0%
December 202530991.6%4.9%0.0%
January 202628289.4%5.7%1.1%
February 202629289.0%6.8%1.0%
March 202632375.5%15.2%2.5%
April 202629380.9%11.3%1.0%
May 202626481.1%15.2%0.8%
June 202626178.5%11.9%1.1%

What drove LAS to IAH delay minutes?

Late aircraft was the largest recorded LAS-to-IAH delay category, accounting for 35.6% of 41,425 BTS-attributed delay minutes during July 2025–June 2026.

Airline33.2%
Late aircraft35.6%
National airspace27.9%
Weather3.3%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.