My son and I are flying to Paris on June 25 and returning July 10. We travel by train to Switzerland (no planes) and back during that time. His passport expires January 6 2020. According to the Travel. State.Gov website France and Switzerland are both Schengen countries. When I elect France for more info it says passports must be valid 3 beyond departure from Schengen area. So far so good. Switzerland says passports must be valid 6 months beyond date of departure from Schengen area. Not so good. Because we leave Switzerland July 9 (albeit by train) that's cutting it close. Am I correct in assuming that because we fly from Paris the 3 month period governs? Because he is under 16 and we share custody it will be complicated to renew his passport. Anyone have some real world advice?