How often are SEA to LAX flights on time?

Flights from Seattle (SEA) to Los Angeles (LAX) arrive on time 88% of the time across 46,074 flights of official data.

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

United Airlines has the best on-time record on this route at 94% across 3,874 flights.

Route reliability

Flights from Seattle to Los Angeles arrive on time 88% of the time across 46,074 flights. Here’s how each airline really performs.

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On-time rate

46,074 flights

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

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

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