Swiss Railways (SBB/CFF/FFS) operates a train from Geneva to Founex every 30 minutes. Tickets cost $11 - $21 and the journey takes 9 min. Alternatively, Noctambus Geneve operates a bus from Geneva to Founex twice daily, and the journey takes 41 min. tpg also services this route 4 times a week.
From Genève line 250 train to Coppet. 9 min SFr 20. From Genève Gare Cornavin bus to Founex Village. 41 min SFr 7. From Geneva taxi to Founex. 18 min SFr 93. From Geneva drive to Founex. 18 min SFr 3. From Geneva Uber to Founex. 18 min SFr 57.