The United States this Monday opened its air borders to fully vaccinated international travelers, welcoming tourists who have been out of the country for about 20 months. This is a clear relief for the tourist industry and families after the impediments caused by the Covid-19 pandemic.

Airline executives said that bookings have increased since Joe Biden's executive announced that he would suspend the restrictions.

"Shares of United Airlines, Delta Air Lines and American Airlines each rose more than one percent. These carriers have the largest international service of the U.S. airlines and could benefit from the pickup in travel to the U.S.," CNBC advances.

The travel restrictions imposed by Donald Trump last year and continued by Joe Biden earlier this year covered some 33 countries, mostly in Europe, Asia, Brazil and South Africa.

Tourists can now make their way to the US upon proof of a full vaccination. The US said they accept any vaccine authorized by the World Health Organization and Food and Drug Administration, namely Johnson & Johnson, Pfizer/BioNTech, Moderna, AstraZeneca, Covishield, Sinopharm and Sinovac.

Documentation can be shown as a paper certificate, a photo of the document, or a scanned version. There are exemptions for travelers under the age of 18 and travelers from countries with low vaccination availability.

The United States will also require proof of a negative Covid-19 test within the last three days for all vaccinated travelers. The country has required this since January for all arrivals, including US citizens.