round-trip ticket
noun [ C ] US uk/ˈraʊnd.trɪp ˌtɪk.ɪt/ us/ˌraʊnd.trɪp ˈtɪk.ɪt/ (UK return (ticket))
（旅行的）往返票
a ticket for travel to a place and back again
We also offer a variety of tickets including one-way, ten-trip and round-trip tickets. 我们还提供各种类型的车票：单程票、十次票、往返票。