BWI (Baltimore) to IAH (Houston) flights arrive on time 80% of the time. The most reliable airline on this route is United Airlines at 83%. The average delay is 78 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Source: Bureau of Transportation Statistics. Updated May 2026.BWI → IAH
BWI (Baltimore) to IAH (Houston)
BWI → IAH on-time performance by month
24
25
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 83% vs Spirit Airlines at 79%.
Airline Comparison
United Airlines leads at 83% on time; Spirit Airlines trails at 79%.
Accurate?
Good to know
Departing from BWI
78% on timeTSA is currently ~23 min. Best time: 4 AM (about 5 min).
Arriving at IAH
80% on timeWhen flights into IAH are late, the average delay is 75 minutes. Build buffer if you have ground plans.
If connecting at IAH: TSA is ~27 min right now. Allow at least 60 minutes for a domestic connection.
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Data last updated May 2026. Source: Bureau of Transportation Statistics.