For the second quarter ended June 30, the parent company of Alaska Airlines and Horizon Air Industries on July 19 reported net income of $4.7 million, or 18 cents a share, compared with $23.6 million, or 89 cents a share, in the same period last year.

The airline group had revenue of $579.3 million, compared with $552.8 million in the same period last year.

John F. Kelly, chairman, president and chief executive of Alaska Air Group, attributed the strong performance to an increase in leisure travelers, who helped offset a decline in business travel, and to improvements in on-time departures and arrivals.