何時に着く

what time … arrive

→ 何時
phrase Rare #27,558
what time … arrive 何時に asks what time, and 着く means to arrive. The subject is understood from context.
JA: 駅に何時に着く?
EN: What time will you arrive at the station?

明日は何時に着くの?

What time will you arrive tomorrow?

彼が正確に何時に着くのか私は知らない。

I don't know exactly what time he'll arrive.

便りがないので、私は彼女が何時に着くかわからない。

I haven't heard from her, so I don't know what time she'll arrive.

尾道何時に着くの?

What time will you arrive in Onomichi?

— 東京物語 (1953)

列車は何時に着くか調べてみよう。

Let's find out what time the train arrives.