Alaska Airlines will begin offering electronic boarding passes to passengers in several of the cities it serves, eventually including Ontario. Alaska Airlines customers flying from Anchorage, Alaska; Boise, Idaho; Denver; Las Vegas; Portland, Ore.; Seattle; and Spokane, Wash.; were scheduled to begin receiving boarding information and check-in with a mobile device late last week, according to a report from the Associated Press. The new service also works on sister carrier Horizon Air. Both are units of Alaska Air Group. The company said it will begin offering electronic boarding passes on Feb. 24 for passengers leaving San Jose and Fairbanks, Alaska. It will add Ontario, Burbank, Long Beach, Palm Springs, and Sacramento by late March, and other cities throughout the year, according to the Associated Press.