Fetching details from the dictionary...
(staying) one night; overnight stay
overnight rental; per-night rental
出張先のホテルに一泊した。
I stayed one night at a hotel at my business trip destination.
温泉旅館に一泊する予定だ。
I plan to stay one night at a hot spring inn.
一泊だけの短い旅行だったが充実していた。
It was only a one-night trip, but it was fulfilling.