Air time is a fundamental gameplay aspect of the Asphalt series. It is defined as the time (in seconds) the player's car is in the air.
Air time can be achieved by going off ramps or other surfaces. While in the air, the player's car regains nitro, and can be increased even further with stunts such as Flat Spins and Barrel Rolls. Depending on the height of the jump, the angle at which the car takes the jump, and whether or not the player either executes a Flat Spin or a successful Barrel Roll, the car can gain a brief boost of speed right after landing, which is otherwise impossible in real life.
In Asphalt 8: Airborne, on compatible devices, blue air trails are left behind by the vehicle for however long it is in the air (as long as it's not doing a Flat Spin). There are three sets of trails, two on the sides of the car and another one where the car emits its nitro. Sometimes, these air trails may not show up, especially in the Infected races of the Exclusive Metal Events (or races with huge amounts of racers) and in Sector 8 Reverse, usually after entering the teleportation portal.
Knockdowns done in the air are known as Air Knockdowns.
In Career Mode/Career Cup races, the player may sometimes have to reach a total amount of air time.