How often are SEA to BOI flights on time?

Flights from Seattle (SEA) to Boise (BOI) arrive on time 89% of the time across 34,151 flights of official data.

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

Delta Air Lines has the best on-time record on this route at 93% across 13,890 flights.

Route reliability

Flights from Seattle to Boise arrive on time 89% of the time across 34,151 flights. Here’s how each airline really performs.

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On-time rate

34,151 flights

Airline	On-time	Flights
Delta Air Lines	93%	13,890
Alaska Airlines	87%	20,261

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

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