A: Summer vacation has started for your kids, right?

B: Yeah, but our vacation plans are still up in the air.

A: Perhaps you can take them to short trips in the province.

Note: When something is up in the air, it means that it is undecided, uncertain, or unresolved. This expression refers to plans, solutions to problems, disagreements, etc. The precise origin of this idiom is unknown, although its figurative use is easy to understand. It may allude to a coin toss, since as long as the coin is still in the air, the outcome is unknown. It may also refer generally to the uncertain nature of when and where something will come down to Earth when it is “in the air.”