How long can it take between the symptoms and rupture of a brain aneurysm?

Seconds: The most common form of aneurysm is the berry aneurysm. This is usually from the deep structures of the brain and pours blood into the spinal fluid. Severe headache, nausea, vomiting, and then progressive obtundation develop. This can progress to coma and death. If it ruptures into the brain, the symptoms are an acute stroke that may also progress to coma and death.

Usually immediately : Brain aneurysms are usually asymptomatic until they rupture so the first time you know you have one is when it bleeds.

Inmediate: Patients have symptoms immediately after rupture that range from intense headache up to coma depending upon the severity of the rupture and involvement of the brain and location of aneurysm.

Rarely, congenital berry aneurysms present with pupillary dilatation and/ or double vision as expansion, but most often is an acute rupture and within seconds to minutes a profound headache, nausea and vomiting, and progressive coma commence. This is indeed a medical emergency and 50% are DOA on arrival to a medical facility.