"Are offing" is not a word, but if we consider "offing" to mean "approaching" or "about to happen," some possible antonyms could be "distant," "faraway," "unlikely," or "postponed." These words convey a sense of distance, uncertainty, or delay in relation to a future event. For example, if someone asks if the party is still on, we could say "No, it's faraway" to mean that it won't happen any time soon. Similarly, if we talk about a project that was supposed to be completed soon, but then got delayed, we could say "The deadline is postponed, it's unlikely to happen in the near future.