If I'm doing the Math right, the speed necessary to reach Alpha Centauri in 3 seconds would be 13,771,669,991,253,450 meters per second. In shadowrun terms, that's a running rate of 41,315,009,973,760,350 meters per turn, which falls between Speed 52 and 53.
A GMC Banshee, with Speed 8 and Acceleration 4, needs 11 hits to reach Speed 52. 12 hits would put you at Speed 56, which would get you there in less than a second.
That's not likely, but certainly doable, especially with Edge.
But yeah, moral of the story; Never tell an Air Spirit to use Movement on a GMC Banshee unless you want to end up in deep space.