BWI (Baltimore) to IAH (Houston) flights arrive on time 81% of the time. The most reliable airline on this route is United Airlines at 85%. 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 October 2026.BWI → IAH
BWI (Baltimore) to IAH (Houston)
BWI → IAH on-time performance by month
24
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JanFebMarAprMayJunJulAugSepOctNovDec
Worse
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This route is on time most of the time. About 81% of flights arrive on schedule.
Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Accurate?
United Airlines is significantly more reliable on this route at 85% on time vs Frontier Airlines at 69%.
Airline Comparison
United Airlines leads at 85% on time; Frontier Airlines trails at 69%.
Accurate?
Good to know
Departing from BWI
79% on timeTSA is currently ~14 min. Best time: 4 AM (about 5 min).
Arriving at IAH
79% on timeWhen flights into IAH are late, the average delay is 76 minutes. Build buffer if you have ground plans.
If connecting at IAH: TSA is ~24 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what United Airlines owes you — refund rights, action plan, complaint email. Free.
Flying out of BWI? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Know someone flying soon?
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Data last updated October 2026. Source: Bureau of Transportation Statistics.