關於「U class in flight」標籤，搜尋引擎有相關的訊息討論：

Thai Airways: Flight Ticket Booking | Find Flightswww.thaiairways.com › ...What airline fare classes tell you about your ticket - The Points Guythepointsguy.com › guide › airline-fare-classesBusiness Class | Singapore Airlineswww.singaporeair.com › en_UK › flying-withus › cabin