3 sentences

1. 我买了往返的票。

   wǒ mǎi le wǎng​fǎn de piào.

   I bought a round-trip ticket.

   Source: Tatoeba

2. 高速列车定期往返于法国与瑞士之间。

   gāo​sù liè​chē dìng​qī wǎng​fǎn yú fǎ​guó yǔ ruì​shì zhī​jiān.

   The high speed trains travel between France and Switzerland regularly.

   Source: CCMatrix

3. 请给我一张芝加哥的往返票。

   qǐng gěi wǒ yī zhāng zhī​jiā​gē de wǎng​fǎn​piào.

   Please give me a round-trip ticket to Chicago.

   Source: Tatoeba