How often are LAX to SEA flights on time?

Flights from Los Angeles (LAX) to Seattle (SEA) arrive on time 90% of the time across 45,381 flights of official data.

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

Spirit Airlines has the best on-time record on this route at 92% across 274 flights.

Route reliability

Flights from Los Angeles to Seattle arrive on time 90% of the time across 45,381 flights. Here’s how each airline really performs.

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On-time rate

45,381 flights

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

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