from ... to or from... until???
I´m free from 6 p.m. to 9 p.m.

I´m free from 6 p.m. until 9 p.m.

Which is the correct question?

Question

from ... to  or   from... until???
I´m free from 6 p.m. to 9 p.m.

I´m free from 6 p.m. until 9 p.m.

Which is the correct question?

Answer

I agree with Ruthi as both sentences are correct.

We use until/till in the sense of 'time up to'.

e.g.

I waited for her until 12am, but she didn't come.

Answer

Both are correct and you can also say I am free between 6pm and 9 pm

Answer

"Which is the correct question?"

Both are correct, but neither is a question!

You should have asked "which is the correct statement?"