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

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

81.7% of 3,457 official scheduled IAH-to-LAS flights arrived on time; 11.4% arrived at least 30 minutes late and 0.8% 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
81.7%arrived on time
11.4%30+ min late
0.8%cancelled
3,457scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late6.4%all scheduled flights
120+ minutes late2.5%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+1.6 mincompleted flights

Which departure time was most reliable for IAH to LAS?

Among qualifying IAH-to-LAS departure window results, Early morning had the highest on-time rate: 91.2% of 456 flights. Night was lowest at 73.4% across 320 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning45691.2%5.3%0.9%
Late morning63187.0%7.6%0.3%
Afternoon1,15383.5%9.5%0.6%
Evening89773.8%17.5%0.6%
Night32073.4%17.8%3.1%

Which weekday was most reliable for IAH to LAS?

Among qualifying IAH-to-LAS weekday results, Wednesday had the highest on-time rate: 89.4% of 452 flights. Friday was lowest at 75.7% across 527 flights.

DayFlightsOn time30+ minCancelled
Monday51679.5%14.3%1.0%
Tuesday43086.5%7.2%0.7%
Wednesday45289.4%6.6%0.0%
Thursday52481.3%11.6%0.4%
Friday52775.7%14.2%1.5%
Saturday47282.6%10.0%0.8%
Sunday53679.1%14.4%1.1%

Which airline was most reliable for IAH to LAS?

Among qualifying IAH-to-LAS airline results, United Airlines had the highest on-time rate: 83.5% of 2,602 flights. Frontier Airlines was lowest at 70.1% across 328 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines2,60283.5%9.8%0.4%
Spirit Airlines52780.1%13.1%2.1%
Frontier Airlines32870.1%21.3%2.1%

Which month was most reliable for IAH to LAS?

Among qualifying IAH-to-LAS month results, December 2025 had the highest on-time rate: 90.2% of 307 flights. June 2026 was lowest at 72.8% across 261 flights.

MonthFlightsOn time30+ minCancelled
July 202529174.9%15.5%0.7%
August 202528678.3%15.0%1.0%
September 202525582.7%8.2%0.0%
October 202529282.9%9.2%0.0%
November 202531179.4%13.8%0.0%
December 202530790.2%6.5%0.0%
January 202628287.2%5.3%0.7%
February 202629189.7%4.5%1.4%
March 202632382.7%11.1%2.5%
April 202629577.3%16.6%1.4%
May 202626381.4%12.9%0.4%
June 202626172.8%18.8%1.5%

What drove IAH to LAS delay minutes?

Late aircraft was the largest recorded IAH-to-LAS delay category, accounting for 37.2% of 43,378 BTS-attributed delay minutes during July 2025–June 2026.

Airline36.0%
Late aircraft37.2%
National airspace22.0%
Weather4.8%
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.