This is kind of one-sided. Had it not been for the "no proper brakes" I'd take superspeed hands down, but without that the only logical option is flight, since while you'd need to learn how to use it, you can still use it. That against instant death by inertia or teleporting yourself into a solid object (0.005% chance means I'm pretty much assured to do so after 20,000 teleports, and that will happen eventually) it's the only logical option if only due to the fact it isn't going to inherently kill you.
That being aside: had this been a fair fight between the three powers without the drawbacks I'd take superspeed. Flight is nice and all, but superspeed will still get you there, and you can use superspeed to do a lot of interesting hero and villain things in confined spaces that neither other power allows for.