Superman's speed in comics varies depending on the storyline and the writer. Generally, he can fly at supersonic speeds and even approach the speed of light in some cases. His speed is often used to save the day and overcome impossible odds.
Maybe he uses some new jutsu. For example, he could have developed a special chakra - based technique that allows him to manipulate the air currents around him, much like how some wind - style jutsu work. This would give him the lift he needs to fly.
I'm not really sure. It depends on how you define a 'story' and what kind of bugs you mean. Some bugs might have no stories associated with them at all.
In comics, flying is often depicted by showing characters with outstretched arms and a flowing cape. It's a visual cue to suggest movement and suspension in the air.