Which airline is most reliable for IAH (Houston) to LAX (Los Angeles)?

The most reliable airline on the IAH to LAX route is Delta Air Lines, with an on-time arrival rate of 89%.

How often are flights delayed from IAH to LAX?

About 17% of flights from IAH to LAX experience delays. 83% arrive on time.

What's the average delay on IAH to LAX flights?

When flights from IAH to LAX are delayed, the average delay is approximately 69 minutes.

Is a short connection safe after a IAH to LAX flight?

With 83% of IAH to LAX flights arriving on time and an average delay of 69 minutes when late, a connection under 60 minutes at LAX is risky. We recommend at least 75-90 minutes for domestic connections after this route.

IAH → LAX

IAH (Houston) to LAX (Los Angeles)

IAH (Houston) to LAX (Los Angeles) flights arrive on time 83% of the time. The most reliable airline on this route is Delta Air Lines at 89%. The average delay is 69 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).

Source: Bureau of Transportation Statistics. Updated July 2026.

IAH → LAX on-time performance by month

JanFebMarAprMayJunJulAugSepOctNovDec

Worse

Better

This route is on time most of the time. About 83% of flights arrive on schedule.

Delays on this route are most often caused by the airline (crew, maintenance, or boarding).

Accurate?

Delta Air Lines is significantly more reliable on this route at 89% on time vs Frontier Airlines at 72%.

Airline Comparison

Delta Air Lines leads at 89% on time; Frontier Airlines trails at 72%.

Accurate?

Good to know

Departing from IAH

79% on time

Expect ~20 min sitting on the taxiway after your gate pushes back. IAH has long runway queues.

TSA is currently ~10 min. Best time: 4 AM (about 5 min).

More about IAH →

Arriving at LAX

82% on time

When flights into LAX are late, the average delay is 70 minutes. Build buffer if you have ground plans.

If connecting at LAX: TSA is ~21 min right now. Allow at least 60 minutes for a domestic connection.

More about LAX →Connection times at LAX →

Flight cancelled or delayed?

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Flying out of IAH? We'll brief you.

Delays, TSA, weather, gates — we'll let you know if something matters.

IAH Airport LAX Airport

Check the return: LAX → IAH

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Data last updated July 2026. Source: Bureau of Transportation Statistics.