I think it highly likely that if an interviewer asks about your flying early on in an interview, they too are interested in flying. If they ask you about it first, they're most probably a pilot. Both of these scenarios are likely to be a big plus for your job chances, even if only subconciously on the hirer's part.
I see no downside to putting it on your CV. Before I flew I would be impressed if I was interviewing a candidate who could fly - shows they've got some get up and go (no pun intended). Now I know a little about it myself I might use flying as something to talk about to evaluate how they think.