单程票

例句：

1. 1.I need to buy a single-way ticket to the next city.
   我需要买一张去下一个城市的单程票。
2. 2.The airline offered free upgrades for customers who purchased a round-trip ticket.
   航空公司为购买往返票的顾客提供了免费升级服务。
3. 3. She decided to take the train instead of flying due to the cheaper single-way ticket prices.
   由于单程票价更便宜，她决定乘坐火车而不是乘飞机。