My plans are still up in the air.
→   내계획은 아직미정이야.

[예문]
※  up in the air :미정의, 결정되지 않은
The date fot the final exam is still up in the air.
기말시럼날짜가 아직 결정되지 않았다.


A:What are you going to do this weekend?
  주말에 뭐할거니?

B:I don't know. My plans are still up in the air.
 모르겠어.내계획은 아직 미정이야.