How often are IAH to DCA flights on time?

Flights from Houston (IAH) to Washington (DCA) arrive on time 86% of the time across 14,214 flights of official data.

Which airline is most reliable on the IAH to DCA route?

United Airlines has the best on-time record on this route at 87% across 13,425 flights.

Route reliability

Flights from Houston to Washington arrive on time 86% of the time across 14,214 flights. Here’s how each airline really performs.

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On-time rate

14,214 flights

Airline	On-time	Flights
United Airlines	87%	13,425
American Airlines	84%	789

On-time = arrived within 15 minutes of schedule, per BTS TranStats. Compare the reverse leg DCA → IAH.

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Score real IAH–DCA flights on reliability, weather, and connection safety — not just price.

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