expression
away from home; while travelling
A poetic or literary set phrase evoking the feeling of being on a journey, often with a sense of transience or loneliness. Used in classical and modern literary contexts.
旅の空から故郷を思う。
I think of my hometown from the road.
彼は旅の空の下で多くの詩を詠んだ。
He composed many poems under the skies of his travels.