"Де каса?"

Translation: Where is the ticket office?

[Zonia435615]

Yes, in the West, Ukrainian-speakers refer to the "каса" as a "cashier" or "the cash register". The word "каса" does not necessarily mean "a/the ticket booth", but a place/counter where you'd purchase items. (Not necessatily just tickets.)

[Ynhockey]

"Where is the cash register" still not accepted :(

[Ynhockey]

Update: I got feedback now accepting this answer.

[Timothy558007]

I would also say ticket window.