DCA (Washington) to IAH (Houston) flights arrive on time 82% of the time. The most reliable airline on this route is United Airlines at 83%. The average delay is 84 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated October 2026.DCA → IAH
DCA (Washington) to IAH (Houston)
DCA → IAH on-time performance by month
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This route is on time most of the time. About 82% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
United Airlines edges out PSA Airlines on this route — 83% vs 74% on time.
Airline Comparison
United Airlines leads at 83% on time; PSA Airlines trails at 74%.
Accurate?
Good to know
Departing from DCA
77% on timeExpect ~21 min sitting on the taxiway after your gate pushes back. DCA has long runway queues.
TSA is currently ~5 min. Best time: 4 AM (about 5 min).
DCA cancels 2.7% of flights — higher than average. Have a backup plan.
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 ~5 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 DCA? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Know someone flying soon?
Send them the link — delay data, TSA waits, weather, all free.
Data last updated October 2026. Source: Bureau of Transportation Statistics.