What time are you open until'? in GERMAN
How can I translate what time are you open until in German?
Wie lange bleibst du noch offen?

Would this be correct?

Question

What time are you open until'?  in GERMAN
How can I translate what time are you open until in German?
 Wie lange bleibst du noch offen?

Would this be correct?

Answer

Wie lange haben Sie geöffnet ?

Answer

Yes it is, also you can say; Wie lange bleibst du hier?