How often are BOI to SEA flights on time?

Flights from Boise (BOI) to Seattle (SEA) arrive on time 91% of the time across 34,144 flights of official data.

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

Delta Air Lines has the best on-time record on this route at 92% across 13,894 flights.

Route reliability

Flights from Boise to Seattle arrive on time 91% of the time across 34,144 flights. Here’s how each airline really performs.

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On-time rate

34,144 flights

Airline	On-time	Flights
Delta Air Lines	92%	13,894
Alaska Airlines	90%	20,250

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

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