Buying a return ticket is cheaper than a one-way ticket.

购买来回票比单程票便宜。

I bought a one-way ticket to New York.

我买了一张去纽约的单程票。

A one-way ticket to Beijing.

我想买一张到北京的单程票。

This is a one-way ticket to hell.

这是一条有去无回的死路。

For a one-way ticket to shanghai?

去上海的单程票多少钱？

Please give me a one-way ticket to A.

请给我一张去A的单程票。

And bought a one-way ticket to iceland,

买了张去冰岛的单程票

How much is a one-way ticket to New York?

去纽约单程的车票（飞机票）多少钱？

How much for a one-way ticket to Shanghai？

去上海的单程票多少钱？

How much for a one-way ticket to Shanghai?

往上海的单程票多少钱？