How often are STL to DCA flights on time?

Flights from St. Louis (STL) to Washington (DCA) arrive on time 85% of the time across 13,279 flights of official data.

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

American Airlines has the best on-time record on this route at 86% across 5,786 flights.

Route reliability

Flights from St. Louis to Washington arrive on time 85% of the time across 13,279 flights. Here’s how each airline really performs.

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On-time rate

13,279 flights

Airline	On-time	Flights
American Airlines	86%	5,786
Southwest Airlines	84%	7,493

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

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

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