How often are SEA to PHX flights on time?

Flights from Seattle (SEA) to Phoenix (PHX) arrive on time 87% of the time across 41,907 flights of official data.

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

Delta Air Lines has the best on-time record on this route at 90% across 9,949 flights.

Route reliability

Flights from Seattle to Phoenix arrive on time 87% of the time across 41,907 flights. Here’s how each airline really performs.

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On-time rate

41,907 flights

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

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Nonstop vs. Connecting Flights: The Reliability Trade-off

A stop multiplies the ways a trip can break. When it's worth it — and how to de-risk it.

Do Morning Flights Really Have Fewer Delays?

Yes — and there's a clear reason. How delays snowball through the day.

Are Some Airlines Really More Reliable Than Others?

The reliability gap between airlines is real — here's what actually drives it.

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