Presuming you are letting Jira decide there is a logical link, I suppose. You don't have to, do you? I must admit I haven't used it an awful lot, but maybe this is one of those traps that you use the functionality because it is there, even if it is not useful.

In this example you could for instance create 'Airport' as an task and just write on it that you are going to aim for a dirt strip first and are going to start a separate task for this.

This is the power and weakness of Trello, there is no link! Except of course you can create a new board called 'dirt-strip'

Well, I’d like the tool to display the levels in a useful way, sure. Even just nested bullet points would be okay.