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Lyon is a breeze to get to, with both an international airport (the ultra-modern and very child-friendly Saint Exupéry) and a TGV terminus. Combined Eurostar/TGV tickets can be purchased from Eurostar and Raileurope. A good source of practical information on trains is The Man in Seat 61 (seat61.com). If you choose to drive to Lyon, the city is just over 750km from the Channel ferry port of Calais.