IAH (Houston) to DCA (Washington) flights arrive on time 76% of the time. The most reliable airline on this route is SkyWest Airlines at 87%. The average delay is 68 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated May 2026.IAH → DCA
IAH (Houston) to DCA (Washington)
IAH → DCA on-time performance by month
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JanFebMarAprMayJunJulAugSepOctNovDec
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This route is on time most of the time. About 76% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
SkyWest Airlines edges out United Airlines on this route — 87% vs 76% on time.
Airline Comparison
SkyWest Airlines leads at 87% on time; United Airlines trails at 76%.
Accurate?
Good to know
Departing from IAH
80% on timeExpect ~18 min sitting on the taxiway after your gate pushes back. IAH has long runway queues.
TSA is currently ~27 min. Best time: 4 AM (about 5 min).
Arriving at DCA
79% on timeWhen flights into DCA are late, the average delay is 74 minutes. Build buffer if you have ground plans.
If connecting at DCA: TSA is ~14 min right now. Allow at least 60 minutes for a domestic connection.
DCA has a 2.6% cancellation rate — keep the airline app handy for rebooking.
Flight cancelled or delayed?
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Data last updated May 2026. Source: Bureau of Transportation Statistics.