Which airline is most reliable for IAH (Houston) to BWI (Baltimore)?

The most reliable airline on the IAH to BWI route is Spirit Airlines, with an on-time arrival rate of 79%.

How often are flights delayed from IAH to BWI?

About 23% of flights from IAH to BWI experience delays. 77% arrive on time.

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

When flights from IAH to BWI are delayed, the average delay is approximately 63 minutes.

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

With 77% of IAH to BWI flights arriving on time and an average delay of 63 minutes when late, a connection under 60 minutes at BWI is risky. We recommend at least 75-90 minutes for domestic connections after this route.

IAH → BWI

IAH (Houston) to BWI (Baltimore)

IAH (Houston) to BWI (Baltimore) flights arrive on time 77% of the time. The most reliable airline on this route is Spirit Airlines at 79%. The average delay is 63 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).

Source: Bureau of Transportation Statistics. Updated August 2026.

IAH → BWI on-time performance by month

JanFebMarAprMayJunJulAugSepOctNovDec

Worse

Better

This route is on time most of the time. About 77% of flights arrive on schedule.

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

Accurate?

Spirit Airlines is significantly more reliable on this route at 79% on time vs Frontier Airlines at 58%.

Airline Comparison

Spirit Airlines leads at 79% on time; Frontier Airlines trails at 58%.

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

More about IAH →

Arriving at BWI

80% on time

When flights into BWI are late, the average delay is 61 minutes. Build buffer if you have ground plans.

If connecting at BWI: TSA is ~5 min right now. Allow at least 60 minutes for a domestic connection.

More about BWI →Connection times at BWI →

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 BWI Airport

Check the return: BWI → IAH

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