Canada: August 21 for the American-Canadian land border.
Mexico: August 20 for the American-Mexican land border.
Bahamas: July 1.
Barbados: July 1. Travelers from outside the Caribbean are required to take a COVID-19 test 72 hours before arrival.
Grenada: August 1. High-risk countries – including the US – not accepted yet.
Jamaica: July 15. Travelers arriving from high-risk states will be required to present a COVID-19 test result taken within 10 days of arrival in Jamaica.
Puerto Rico: July 15. All travelers must present a COVID-19 test result upon arrival or quarantine for 2 weeks.
St Barts: June 22. All travelers must present a COVID-19 test result upon arrival.
St. Lucia: June 4. All travelers must present a COVID-19 test result upon arrival. American Airlines confirmed it sent its first plane there on July 9.
St. Maarten: August 1 for Americans. It may be extended.
Turks & Caicos: July 22.
U.S. Virgin Islands: May 18.
Souce: USA TODAY.