Translation of “It will be a while before/until…”

Question

When explaining that something won't happen soon, English uses expressions like:

It will be a while until ...

It will be a while before ...

It will be a long time until ...

It will be quite some time before ...

etc.

What is the most natural translation of sentences like these into Spanish?

Answer 1

Tomará un tiempo hasta que ...

Llevará un tiempo hasta que ...

The word "un" is sometimes omitted here, or replaced by "algún", or "bastante", or "considerable", etc.

Answer 2

Pasará un tiempo hasta que ...

Transcurirrá un tiempo antes que ...