How often are IAD to LAX flights on time?

Flights from Washington (IAD) to Los Angeles (LAX) arrive on time 89% of the time across 13,527 flights of official data.

Which airline is most reliable on the IAD to LAX route?

United Airlines has the best on-time record on this route at 90% across 11,457 flights.

Route reliability

Flights from Washington to Los Angeles arrive on time 89% of the time across 13,527 flights. Here’s how each airline really performs.

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On-time rate

13,527 flights

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

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