Sea-Tac Airport and its largest airline, Alaska Airlines, have again won top

Flight-tracking Web site FlightStats.com named Alaska as on-time arrival perfomance champ among major North American Airlines for 2011.

The site said Sea-Tac was the best of major international airports for on-time departures last year.

Both the airport and the airline won similar honors in 2010.

Alaska’s on-time arrival performance last year was a record 87.79 percent for the airline. That compares with an average performance of of 76.40 percent on-time for other North American carriers in that category.

Sea-Tac departures averaged 86.28 percent on-time in 2011. Other airports in that same major international airports category racked up a 71.02 percent average on-time record.

Salt Lake City’s airport achieved a marginally higher on-time performance, 86.55 percent, among North American airports, but FlightStats didn’t consider it a major international airport, the category in which Sea-Tac won.

Hawaiian Airlines posted a better on-time arrival record than Alaska, 91.96 percent, but FlightStats considered the island carrier to be a regional airline.

Both Alaska and Sea-Tac may have a difficult time repeating the honors for a third year in a row. Last week’s snow and ice storm will put a big dent in the airline and airport January on-time figures.

Alaska cancelled dozens of flights, and the airport operations lagged because planes, runways and taxiways were coated with a thick layer of ice. Planes in some cases took more than an hour to de-ice in preparation for flight.