La Digue has no airport. All arrivals come by ferry.
The most convenient approach is from Praslin: the Inter Island Ferry takes about 15 minutes and runs several times a day. Ferries also connect La Digue directly to Mahe, with the crossing taking around two and a half hours. The Inter Island Ferry and Cat Cocos both operate these routes; timetables vary by season, so check current schedules before you travel.
Ferries arrive at La Passe on the west coast, where you will also find bicycle rental, ox-carts, and most of the island's guesthouses within easy reach.