Lufthansa, Swiss, and Delta have round-trip flights from Los Angeles (LAX) to Geneva (GVA) for $589-$618 with a connection. Flights April, May, September, October, and November. No Weekends. Departures on Monday, Tuesday, Wednesday, and Thursday. No Thanksgiving dates.
Some small OTAs on Skyscanner and Google have this for cheaper than the airline. If you plan on booking there, beware of any site that charges a fee to cancel a ticket within the 24-hour “free” period. Use unknown booking sites at your own risk.