we won't have timeUsed when saying that there will not be enough time to do something or arrive somewhere. The related past-tense form мы не успели means “we didn't have time” or “we didn't make it.”
RU: Если мы не поторопимся, мы не успеем к началу фильма.
EN: If we don't hurry, we won't make it in time for the start of the movie.