it’s up in the air(未定だ): Our vacation plans are still up in the air. (休暇の計画はまだ未定です) - 試験に出る! 英単語検索辞書

it’s up in the air(未定だ): Our vacation plans are still up in the air. (休暇の計画はまだ未定です)

Our vacation plans are still up in the air.