Answer:
A random search for flights from Mexico City (MEX) to Geneva (GVA) shows:
OPTION 1: 13hr 20min via Paris (CDG)
MEX - CDG Air France Flt 435 Dep 11:20pm 24Sep,Fri
CDG - GVA Air France Flt 1042 Dep 06:30pm 25Sep,Sat
Flight Duration: 11hr 40min; Layover Time: 1hr 40min; Total Trip Time: 13hr 20min
OPTION 2: 13hr 50min via Amsterdam (AMS)
MEX - AMS KLM Royal Dutch Airlines Flt 686 Dep 09:55pm 24Sep,Fri
AMS - GVA KLM Royal Dutch Airlines Flt 1933 Dep 05:15pm 25Sep,Sat
Flight Duration: 11hr 55min; Layover Time: 1hr 55min; Total Trip Time: 13hr 50min