A valid U.S. passport is required to enter and depart Ecuador. Tourists must also provide evidence of return or onward travel. U.S. citizens traveling on regular passports do not need a visa for a stay of 90 days or less. Those planning a longer visit must obtain a visa in advance of arrival. Travelers who stay in Ecuador beyond the allowed entry time are charged a substantial fee and are barred from re-entering Ecuador for six months from the date of departure. An airport exit tax is required when departing Ecuador.