In this week’s roundup, the low-cost carrier Norse Atlantic Airways plans to start service from San Francisco, Los Angeles and two other cities to London this summer; United revives SFO-Hong Kong nonstop flights; EVA Air boosts SFO-Taipei frequencies; Delta resumes nonstop flights on two China routes; additional international route news comes from Ethiopian Airlines, American, ITA, United and Frontier; Spirit Airlines will add a new Texas route from Oakland; Southwest adds service at Sacramento and Long Beach; American drops a Long Beach route but adds a transcontinental one from Orange County; Avelo expands at Hollywood Burbank; a study recommends how early travelers should get to the airport, and SFO ranks…