To travel to the island of St. Martin in 2026, your document requirements depend on whether you are arriving on the French side (Saint-Martin) or the Dutch side (Sint Maarten). Most international travelers, including those from the U.S., Canada, and the EU, must present a valid passport and proof of a return or onward flight. For arrival at the Dutch-side Princess Juliana International Airport (SXM), all visitors must also complete the online immigration form (ED Card) prior to arrival. French and EU citizens arriving at the smaller Grand Case Airport (SFG) on the French side may only need a valid national ID card, though a passport is recommended for all inter-island travel. It is also important to have proof of your accommodation address on the island. While most Western tourists do not require a visa for stays up to 90 days, citizens of other countries should check specific visa requirements with the Dutch or French consulate, as the island is not part of the Schengen Area despite its European ties.