A passport alone will not get you through every international arrival hall. For Americans traveling on ordinary U.S. passports, the key question for a tourist trip is not whether a country calls the document a visa, eVisa or electronic authorization. It is whether you need approval before your flight. These 13 destinations make advance permission part of the trip, although the exact document and application process vary.

Online Approval Comes First
Brazil
Brazil requires U.S. tourists to have visa approval before traveling. The State Department says Americans must apply and be approved for a visa before the trip. The airport is not the place to begin the process.
Uganda
Uganda requires visa-prone travelers to apply online before departure. Its immigration authority says travelers must have a visa approval letter before starting the trip. The same notice says visas are not issued on arrival.
Equatorial Guinea
U.S. citizens traveling to Equatorial Guinea must complete the eVisa application, receive approval before arrival and carry a printed copy of the approval confirmation.

Cameroon
Cameroon starts its visa process online. Travelers complete online pre-enrollment, upload supporting documents and pay through the eVisa system before travel. Depending on the case, the visa can then be affixed at the border or through the appropriate diplomatic or consular post.
Côte d’Ivoire
Côte d’Ivoire has an airport step in its eVisa process, but the application cannot begin there. The State Department says travelers must request the eVisa online before arrival, then complete the airport process.
Different Name, Same Before-You-Fly Rule
Kenya
Kenya uses an Electronic Travel Authorisation rather than a traditional visa for many visitors. Its immigration service says travelers must have an approved eTA before beginning their trip.
Australia
Australia does not issue ordinary U.S. visitors a visa at the airport. The government says non-New Zealand passport holders need the right visa before travel. Approval is required before departure.

A Visa Can Still Be the Advance Requirement
India
India requires U.S. travelers to enter with a visa in their passport or an e-Tourist visa. The State Department lists a visa or e-Tourist visa as the tourist entry options.
Nigeria
Nigeria requires U.S. visitors to arrange a visa before travel. Current State Department guidance says a visa is required and must be obtained before departure.
Bhutan
Bhutan requires visitors from the United States to obtain a visa before traveling. You can apply online yourself or have a tour operator or hotel submit the application on your behalf.
Myanmar (Burma)
U.S. tourists need a visa before traveling to Myanmar. The State Department says travelers can apply through an embassy or consulate or use the country’s eVisa program. The department currently advises U.S. citizens not to travel to Burma.
Ghana
Ghana requires U.S. visitors to obtain a valid entry visa before arrival. The State Department warns that travelers without advance visa approval may be denied boarding or denied entry.

China
For an ordinary tourist visit to China, U.S. citizens generally need a visa before departure. The State Department says travelers should apply before travel, while limited visa-free entry and transit exceptions exist.
The Safest Rule Is to Check Again
Visa rules can change after you plan a trip. A destination may move the application online, while another may keep an airport step that works only after prior approval. Treat the country’s official immigration guidance as part of trip planning, then check it again close to departure. The useful habit is not memorizing a list; it is confirming the rule that applies to your passport and trip on the date you travel.