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

Houston, TX (IAH) to Los Angeles, CA (LAX) flight delay odds

83.0% of 5,260 official scheduled IAH-to-LAX flights arrived on time; 10.2% arrived at least 30 minutes late and 0.6% 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
83.0%arrived on time
10.2%30+ min late
0.6%cancelled
5,260scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.2%all scheduled flights
120+ minutes late2.0%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival-0.1 mincompleted flights

Which departure time was most reliable for IAH to LAX?

Among qualifying IAH-to-LAX departure window results, Early morning had the highest on-time rate: 93.4% of 1,281 flights. Evening was lowest at 74.8% across 1,248 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning1,28193.4%3.2%0.4%
Late morning53681.2%11.2%0.9%
Afternoon1,61882.9%11.1%0.4%
Evening1,24874.8%15.2%0.6%
Night57780.1%11.8%0.9%

Which weekday was most reliable for IAH to LAX?

Among qualifying IAH-to-LAX weekday results, Wednesday had the highest on-time rate: 87.8% of 737 flights. Saturday was lowest at 79.8% across 682 flights.

DayFlightsOn time30+ minCancelled
Monday77282.5%11.0%0.8%
Tuesday72785.8%8.8%0.4%
Wednesday73787.8%8.3%0.3%
Thursday78382.4%10.0%0.5%
Friday77682.0%9.9%0.6%
Saturday68279.8%13.0%0.3%
Sunday78381.0%10.7%1.0%

Which airline was most reliable for IAH to LAX?

Among qualifying IAH-to-LAX airline results, Delta Air Lines had the highest on-time rate: 87.4% of 645 flights. Frontier Airlines was lowest at 71.7% across 332 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines3,41684.0%9.6%0.3%
Delta Air Lines64587.4%7.4%1.1%
Spirit Airlines45882.3%10.3%1.3%
SkyWest Airlines40877.7%15.2%0.5%
Frontier Airlines33271.7%16.0%1.2%
American Airlines1100.0%0.0%0.0%

Which month was most reliable for IAH to LAX?

Among qualifying IAH-to-LAX month results, September 2025 had the highest on-time rate: 86.4% of 440 flights. July 2025 was lowest at 77.3% across 454 flights.

MonthFlightsOn time30+ minCancelled
July 202545477.3%15.4%1.1%
August 202544285.1%8.1%0.9%
September 202544086.4%8.0%0.0%
October 202549384.4%9.3%0.0%
November 202544680.0%11.7%0.7%
December 202544883.3%9.4%0.7%
January 202643784.9%8.2%1.4%
February 202639885.4%8.3%0.0%
March 202644684.8%11.4%1.1%
April 202643781.9%10.1%0.5%
May 202642283.9%10.2%0.2%
June 202639778.8%12.6%0.3%

What drove IAH to LAX delay minutes?

Airline was the largest recorded IAH-to-LAX delay category, accounting for 40.6% of 54,689 BTS-attributed delay minutes during July 2025–June 2026.

Airline40.6%
Late aircraft34.3%
National airspace16.8%
Weather8.2%
Security0.1%
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.