プログレッシブ和英中辞典(第4版)の解説
りょこうさき【旅行先】
〔行き先〕one's destination (in travel);〔滞在地〕the place where one is staying
旅行先から必ず絵はがきをください
Be sure to send me (picture) postcards from the places 「you visit [where you stay].
旅行先で病気になった
He was taken ill while traveling.