空そらの便びんMeanings1expression, nounflight (plane)Refers to a flight service or a plane trip, often used in contexts like booking or checking flight availability.東とう京きょうまでの空そらの便びんを予よ約やくしました。I booked a flight to Tokyo.悪あく天てん候こうで空そらの便びんが欠けっ航こうになった。The flight was canceled due to bad weather.