Air yards is defined as the total distance that a football is thrown beyond the line of scrimmage to the point of reception. Air yards is calculated by taking total passing yards and subtracting Yards After the Catch (YAC).
More about Quarterback Air Yards
While it isn't a clear cut statistic, it does give us an indication of how much of a quarterback's total pass yards are due to the QB vs receiver by eliminating the 2 yard dump pass that ends up being a 50 yard gain.
Note: there is a one day delay on the YAC calculation due to ensuring accuracy in review of each play, which may lead to some inaccuracies for a day following each game.