A trip or outing completed within a single day without staying overnight; a day trip.
週末に日帰りで温泉に行ってきた。
I went to a hot spring on a day trip over the weekend.
日帰りツアーは荷物が少なくて気楽だ。
Day trips are convenient because you don't have much luggage.
彼は仕事の都合で日帰りで出張した。
He went on a business trip and returned the same day due to work circumstances.