How often are SAN to SEA flights on time?

Flights from San Diego (SAN) to Seattle (SEA) arrive on time 89% of the time across 27,403 flights of official data.

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

Delta Air Lines has the best on-time record on this route at 91% across 9,872 flights.

Route reliability

Flights from San Diego to Seattle arrive on time 89% of the time across 27,403 flights. Here’s how each airline really performs.

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On-time rate

27,403 flights

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

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