To practice single-jump aerialling, position yourself in the goal and fly from one goal to the other. Try to slow yourself down in the air, then speed yourself back up. This will help you get used to changing your speed in the air. Also, moving your joystick to the left or right will send your car in that direction.
There are other answers below:
AERIAL TUTORIAL | How to Fly in Rocket League! – YouTube.
In this video I will be demonstrating how to fly in rocket league with a mouse and keyboard.
To actually fly, you should double tap the jump button and, once in the air, press the boost to propel you forward. Make sure you are patient and anticipate where the ball is going.
Flying just involves using boost while in the air, but it will take a lot of practice to become precise with it. To perform the action just jump or get into the air any way you can, then angle your car vertically or in an upward direction you want to travel then hold boost.
If you’re interested in flying in Rocket League you will need to use the boost. It’s always good to make sure that the boost bar is fully charged so that your flight won’t end immediately after it’s started. You must begin by performing a single or (a better idea) a double jump and then hold the boost button/key while you’re still in the air.
One of the most complicated to manipulate is Flight, better known as “Air Control” , which basically consists of controlling the car through the air, either to move or guide the ball. This takes a lot of practice and part of the key to becoming a professional gamer.
There are many tips and tricks that players can use to master the game, but learning how to control your vehicle while it’s flailing through the air at high speed (otherwise known as an “aerial”) is where the true art of the League lies.
I’d start on the backboard above a goal and fly to the other goal and land on the corresponding backboard. Once you get comfortable with this, try doing it while facing backwards (reverse controls). Then when you get comfortable with that, fly …
You might want to use LB and RB for this. Spinning into the ball adds power on collision, same as flips. It can also help the chances of the ball being directed into or away from a goal, depending on what you’re trying to do. It can also turn the car into a bigger presence in the air.
