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.
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) Vehicle Fly
Players often use "Vehicle Fly" scripts or commands to make cars soar over the map, bypass obstacles, or reach high buildings. Using the Skyride mod from the in-game repository,
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 Vehicle Fly