I have repaired cracks but you have to catch them before they run away. I'm trying to work out what that is in inches, I'm old. No, that sounds way to long unless its not moving in which case you may have a chance if you work from the outer ends inward. I had one that started with a chip and we had frost that night, by the time the ice had melted it was beyond redemption.
If you have windscreen cover I think its about 80 pounds for a new windscreen.
Peter