How often are PDX to SEA flights on time?

Flights from Portland (PDX) to Seattle (SEA) arrive on time 92% of the time across 48,903 flights of official data.

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

Delta Air Lines has the best on-time record on this route at 93% across 15,757 flights.

Route reliability

Flights from Portland to Seattle arrive on time 92% of the time across 48,903 flights. Here’s how each airline really performs.

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On-time rate

48,903 flights

Airline	On-time	Flights
Delta Air Lines	93%	15,757
Alaska Airlines	91%	33,146

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

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