What do you think about Bulat VS Wave? Before Wave got the Mastema.Well, if he just stayed in the air out of Akame's reach, it wouldn't really help him anyway. We've already agreed that Akame would deflect feathers more easily at a larger distance. So Ran would still have no choice but to get lower, eventually (after all, he can't fly for too long - and no, the "feathers lack in power" thing still makes no sense, but I'm not going there again). And then Akame would get him since she'd have no problem bypassing any defenses he'd put up.
But yeah, if you're asking whether he'd be able to see and react to her if she tried to jump to him, then yes, he likely would, at least as long as he is high (lol) enough. And I don't think he'd want to get closer if she tried jumping to him.