How often are ATL to SEA flights on time?

Flights from Atlanta (ATL) to Seattle (SEA) arrive on time 88% of the time across 20,548 flights of official data.

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

Delta Air Lines has the best on-time record on this route at 88% across 14,914 flights.

Route reliability

Flights from Atlanta to Seattle arrive on time 88% of the time across 20,548 flights. Here’s how each airline really performs.

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On-time rate

20,548 flights

Airline	On-time	Flights
Delta Air Lines	88%	14,914
Alaska Airlines	87%	5,634

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

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