Via press release from the State Department:
International Travel Challenges During COVID-19
U.S. citizens who choose to travel internationally should be aware that they may face unexpected challenges related to COVID-19 as they attempt to return to the United States or attempt to travel from one overseas location to another.
U.S. citizens who do choose to travel internationally should make contingency plans, as they may have to remain in a foreign country longer than originally planned, which will be at their own expense.
The Department recommends international travel insurance with coverage for COVID-related trip cancellation and medical benefits. In general, Medicare and Medicaid do not cover overseas medical costs.
Before boarding a flight to the U.S., all air travelers aged two and older, regardless of nationality or vaccination status, are required to show documentation of a negative viral test result taken within one day of the flight’s departure to the United States, or documentation of recovery from COVID-19.
In addition, some countries have imposed other travel requirements. These may include quarantine on arrival, mandatory COVID-19 testing requirements, proof of vaccination, travel restrictions, and closed borders.
Some countries have also imposed travel restrictions requiring mandatory quarantine for those testing positive on departure, which could delay a traveler’s ability to travel to another country. Foreign governments in any country may implement restrictions with little notice.
The State Department extended the exception for travelers returning from overseas travel on expired passports, which had been set to expire Friday. https://t.co/OarMUZEI45
— USA TODAY Travel (@usatodaytravel) December 30, 2021