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Sea-Tac is nearly tied with Charlotte Douglas International, with on-time departures of 79.3 percent and on-time arrivals of 76 percent. The airport is served primarily by Alaska Airlines and its subsidiary Horizon Air, which recently announced that it is reducing the number of flights from Seattle to Portland and Bend, Ore., Idaho Falls, and Sun Valley, Idaho, among others, and is discontinuing service to Butte, Mont.


