Historical on-time performance

IAHLAX

Houston to Los Angeles

1,379 miData through Dec 2025Source: US DOT · BTS

Flights on IAH–LAX arrive on time 82% of the time over the last 12 months.

On-time rate82%arrived within 15 min

Median delayon timetypical arrival

p90 delay30 min1 in 10 flights is worsetail risk

Cancelled0.8%of scheduled flights

based on 5,244 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

Airline	On-time	Median	p90	Cancel	Flights
Delta Air Linesbest	86%	on time	20 min	1.2%	650
SkyWest Airlines	81%	on time	35 min	0.5%	380
Spirit Airlines	83%	on time	30 min	1.1%	730
United Airlines	83%	on time	30 min	0.7%	3,269
Frontier Airlines	63%	on time	60 min	1.9%	215

Delta Air Linesbest
On-time86%
Medianon time
p9020 min
Cancel1.2%
Flights650
SkyWest Airlines
On-time81%
Medianon time
p9035 min
Cancel0.5%
Flights380
Spirit Airlines
On-time83%
Medianon time
p9030 min
Cancel1.1%
Flights730
United Airlines
On-time83%
Medianon time
p9030 min
Cancel0.7%
Flights3,269
Frontier Airlines
On-time63%
Medianon time
p9060 min
Cancel1.9%
Flights215

Why flights run late

Delay causes

Airline42%
Weather9%
Air traffic (NAS)17%
Late aircraft32%
Security0%

Most delay minutes here are attributed to Airline.

Over time

On-time trend

By season

On-time rate by month

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Keep exploring

Related pages

Delay predictorfor this route→IAH airportHouston→LAX airportLos Angeles→Delta Air Lines on this routecarrier detail→Delta Air Linesairline profile→