How often are DCA to IAH flights on time?

Flights from Washington (DCA) to Houston (IAH) arrive on time 89% of the time across 14,206 flights of official data.

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

United Airlines has the best on-time record on this route at 90% across 13,419 flights.

Route reliability

Flights from Washington to Houston arrive on time 89% of the time across 14,206 flights. Here’s how each airline really performs.

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On-time rate

14,206 flights

Airline	On-time	Flights
United Airlines	90%	13,419
American Airlines	85%	787

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

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

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