Alaska Airlines, building on its continuing expansion effort in San Diego, announced Tuesday it will add three new nonstop flights and significantly increase flight frequency for four of its more popular routes.

Alaska Airlines is launching three new nonstop routes from San Diego later this year, it was announced Tuesday.

Alaska Airlines is making strategic changes to its route network, with some cities losing service while others gain new international connections. Alaska Airlines said it will cut several routes this year but will add flights using Hawaiian Airlines’ Boeing 787 Dreamliners and use the widebody aircraft to support international growth from its Seattle hub over the coming years.