From Nantes Atlantique Airport (NTE):
Take the TAN bus line 38 towards Beaujoire – Parc des Expositions (approx. 25 min).
From Paris airports (Roissy – Charles de Gaulle / Orly):
By train: TGV from Paris Montparnasse to Nantes station (approx. 2h) + tramway line 1 direction François Mitterrand to “Parc Expo” stop.
By plane: Direct flights to Nantes Atlantique Airport, then TAN bus line 38 to Parc des Expositions.