Norwegian Air, the low-cost carrier, will move two existing routes from Oakland International Airport to San Francisco International Airport, as well as shift some year-round routes to seasonal service. Norwegian will move the two nonstop services to Barcelona-El Prat Airport and Paris’s Charles de Gaulle Airport from Oakland to San Francisco starting Oct. 28 and Oct. 30, respectively.  Norwegian is also changing several year-round routes to summer seasonal service as a result of lower demand during winter months. Ten routes that were previously year-round from the US will not operate this winter, but some might return for the 2020-2021 winter season. Norwegian’s Las Vegas-to-London and Orlando-to-Stockholm services have been discontinued indefinitely. This summer, Norwegian is operating 188 weekly flights from the US to Europe, compared with 163 weekly flights in summer 2018. This winter, the airline will operate 113 weekly flights from the US to Europe, compared with 150 weekly flights during the winter of 2018-2019.