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

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

Historically, 81.7% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 3,457 flights.

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

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

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%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

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%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 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%

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

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 reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

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.