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

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

Historically, 83.0% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 5,260 flights.

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

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 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%

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
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%

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 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%

Monthly trend

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

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 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.

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.