OK, so you get some kind of radar installed in your head. But now you have the atmosphere to deal with. Wind constantly blowing particles into your eyes and the freezing cold. Granted, you'd have to go up pretty high to get that effect, but you're not going to be a moron and fly where people can see you.
"'No, honey, you take the car, I'd rather fly'. Such an idiot.
Oh, by the way, you might want to be careful what you wear. Not only is it cold enough to freeze your balls, but lower temperatures mean you're more of a conductor of electricity. It's like when you're walking home on a winter day, come in and shock the shit out of whatever you touch. Multiply that by say, a million. If you're wearing anything like wool--though we don't know what the Hell kind of superhero would wear wool anyway--you're going to be a human capacitor. If you happen to be a supervillain, we suggest working on your Palpatine voice so you can make one Hell of an entrance when you land.