Create a Crossjoin Table with boolean condition

can you please give some sample data, even if not real data and give what you expect the solution to be?

are you saying you want to know every flight in the sky in within 12 hours of a flight?  

if you are able to provide

1, sample data with expected solution then it is very easy to work it out for you.   This doesn't look like the best to do to this, you are better to model yoru tables more effectively, and do the calcation a very different way, as i am not sure those will work, but first one needs to understand the rule in your data that the data must adhere to, and how you have your model set up.  then it would be easier to figure out how to model this solution  The answer is in how you model your data.

can you provide some sample data or your pbix?