noun
travel destination; place one is staying while traveling
Refers to the place one goes to or stays at during a trip. Can be used for both the destination itself and the accommodation.
旅行先から絵葉書を送った。
I sent a picture postcard from my travel destination.
旅行先で美味しいものをたくさん食べた。
I ate a lot of delicious food at the place I was staying during my trip.
宿泊先 specifically refers to the place where one stays overnight, while 旅行先 can refer to the broader destination or the place one is staying.
Compound of 旅行 (travel) + 先 (destination, place).