How often are SFO to SEA flights on time?

Flights from San Francisco (SFO) to Seattle (SEA) arrive on time 86% of the time across 40,787 flights of official data.

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

Delta Air Lines has the best on-time record on this route at 90% across 10,627 flights.

Route reliability

Flights from San Francisco to Seattle arrive on time 86% of the time across 40,787 flights. Here’s how each airline really performs.

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On-time rate

40,787 flights

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

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Are Some Airlines Really More Reliable Than Others?

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