How long does it take to heal a c1 & C2 neck fracture?

3+ months. Fractures of c1 and c2 range from very mild fractures to severe fractures that place the spinal cord at risk. Some need a simple collar, some a halo, and others a surgery. Depending on the specific fracture and how it is treated, it can take 3-6 months to be completely healed. All c1 and c2 fractures should be seen by a spine surgeon to make sure they heal properly to protect your spinal cord.
8-12 weeks. It depend on the fracture and how sever it is. And the methods of treatment. Some time they have to apply special halo from the out side to keep the fracture stable.