Twice a day, at 10 a.m. and 4 p.m., the cafes and shops of Helsinki Airport echo to the languages of Tokyo, Shanghai and Seoul.
For a few hours, the Finnair Oyj base bustles with Chinese businessmen, Japanese students and vacationing Koreans, all changing planes at a terminal fortuitously positioned on the shortest flyway between Europe and Asia.
“We’re a Gulf carrier &mdash...