He likes traveling alone.

他喜欢单独旅游。

youdao

I hate traveling alone!

我讨厌独自旅行！

youdao

I'm writing this letter to ask you for some tips on traveling alone.

我写这封信是想向你寻求一些单独旅行的建议。

youdao

Ademar Barilli says that women traveling alone are especially vulnerable, and that the safe house pays special attention to such cases, although they are not unusual.

VOA: standard.2009.09.01

She had originally planned to travel with a friend but ended up traveling alone when her friend canceled.

WSJ: Body of Vacationing New York Woman Found in Turkey

Privacy issues aside, the service could prove invaluable for people traveling alone in unfamiliar areas or dangerous situations.

CNN: In an emergency, who do you call?

Anyone traveling alone would be wise to grab a window seat, which is the total opposite of my usual strategy.

FORBES: Radical Business Class Sets British Airways Apart