Common carriers on SMF–GDL itineraries include U.S. legacy carriers (American, United, Alaska) and Mexican low-cost or network carriers (Volaris, Aeroméxico) via one-stop routings. Legacy carriers often provide more flexible rebooking, checked-baggage bundles and loyalty program ties that benefit frequent travelers, while low-cost carriers can offer lower base fares if you travel light and buy add-ons carefully. For November travel, compare total trip price including baggage and seat fees, check connection airports (LAX, PHX, DFW or MEX), and evaluate schedule convenience—sometimes paying a small premium for fewer or shorter layovers is worth the time saved. CTA: Compare airlines for your November SMF–GDL trip and factor in baggage and connection times before booking.