In the automotive industry, "flying car" features are moving from concept to reality through (electric Vertical Takeoff and Landing) technology: How to Fly Any Car in BeamNG.drive (Beginner Guide)
Using the Skyride mod from the in-game repository, you can assign custom keybinds to toggle flight and control vertical movement (up/down) for any vehicle.
Some players refer to "speed boosts" as a way to "fly forward" by mapping a boost key in the game's control settings. Real-World "Vehicle Fly" Technology
Players often use "Vehicle Fly" scripts or commands to make cars soar over the map, bypass obstacles, or reach high buildings.