My girlfriend and I were headed east on Hwy 12 when noticed 2 seemingly hovering lights above the Hill/Ridgeway (I say seemingly because we were driving along but it never changed course or direction. It wasn't until we stopped at a light that it started to move towards us and flew overhead headed west. At that point we parked in the Safeway parking lot and watched it slowly move away and when it was closer to downtown Santa Rosa, it changed direction to head south west and sped off very quickly until it disappeared from view. It flew right below the cloud cover and there were no blinking lights that you see on planes/ helicopters at night... There was a lead light and another trailing it and to the left as you looked at it. At first it looked like aa plane landing at night from head on...but it always maintained the same height.