Which airline is most reliable for IAH (Houston) to SJU (San Juan)?

The most reliable airline on the IAH to SJU route is United Airlines, with an on-time arrival rate of 81%.

How often are flights delayed from IAH to SJU?

About 20% of flights from IAH to SJU experience delays. 80% arrive on time.

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

When flights from IAH to SJU are delayed, the average delay is approximately 70 minutes.

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

With 80% of IAH to SJU flights arriving on time and an average delay of 70 minutes when late, a connection under 60 minutes at SJU is risky. We recommend at least 75-90 minutes for domestic connections after this route.

IAH → SJU

IAH (Houston) to SJU (San Juan)

IAH (Houston) to SJU (San Juan) flights arrive on time 80% of the time. The most reliable airline on this route is United Airlines at 81%. The average delay is 70 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).

Source: Bureau of Transportation Statistics. Updated March 2026.

IAH → SJU on-time performance by month

JanFebMarAprMayJunJulAugSepOctNovDec

Worse

Better

This route is on time most of the time. About 80% of flights arrive on schedule.

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

Accurate?

Airlines are roughly equal on this route — United Airlines leads slightly at 81% vs Spirit Airlines at 77%.

Airline Comparison

United Airlines leads at 81% on time; Spirit Airlines trails at 77%.

Accurate?

Good to know

Departing from IAH

80% on time

Expect ~18 min sitting on the taxiway after your gate pushes back. IAH has long runway queues.

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

More about IAH →

Arriving at SJU

75% on time

When flights into SJU are late, the average delay is 75 minutes. Build buffer if you have ground plans.

If connecting at SJU: TSA is ~7 min right now. Allow at least 60 minutes for a domestic connection.

More about SJU →Connection times at SJU →

Flight cancelled or delayed?

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Delay riskDOT stats + live data

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