How often are EWR to SEA flights on time?

Flights from Newark (EWR) to Seattle (SEA) arrive on time 86% of the time across 11,540 flights of official data.

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

Alaska Airlines has the best on-time record on this route at 86% across 5,993 flights.

Route reliability

Flights from Newark to Seattle arrive on time 86% of the time across 11,540 flights. Here’s how each airline really performs.

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On-time rate

11,540 flights

Airline	On-time	Flights
Alaska Airlines	86%	5,993
United Airlines	85%	5,547

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

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

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