Major carriers offering competitive itineraries from San Francisco International Airport (SFO) to Geneva Airport (GVA) in July include Swiss (via Zurich), Lufthansa (via Frankfurt), British Airways (via London), Air France (via Paris CDG), and KLM (via Amsterdam). Swiss and Lufthansa often provide efficient single-connection routings with strong baggage policies and comfortable business-class options; British Airways may offer attractive pricing with transatlantic connectivity through London. Air France and KLM provide frequent schedules and alliance connectivity for onward travel. When comparing airlines, evaluate total travel time, layover duration, baggage allowance, seat selection fees, and onboard amenities. For July travel, prioritize carriers with robust on-time performance and good connection handling to minimize disruption during peak season.