In 2026, a round-trip ferry from St. Maarten to St. Barts typically costs between $100 and $115 USD for an adult. Two main operators dominate this route: the Voyager (departing from Marigot) and the Great Bay Express or Edge (departing from Bobby's Marina or Simpson Bay). A one-way ticket usually costs around $70 to $80. For children (ages 2–11), the rate is roughly half, generally around $50 to $60 round-trip, while infants under 2 often travel for a small administrative fee of about $25. It is important to note that these prices do not always include the Port Fees or Departure Taxes, which can add an additional $15–$20 to your total. Because the crossing can be notoriously "choppy" across the Saint-Barthélemy Channel, these high-speed catamarans take about 45 to 60 minutes. Booking online at least 24 hours in advance is highly recommended to secure your spot and sometimes access "web-only" discounts.