Meanwhile, Vietnam has reported 270 Covid-19 cases, of which 49 are active, and no deaths. The latest two cases were recorded on April 24, and there has been no community transmission since April 16.
Vietnam suspended international flights on March 25 to contain the spread of Covid-19, leaving thousands of foreigners stranded.
Previously, several flights have repatriated hundreds of citizens from Europe and Southeast Asia.
Vietnam Airlines is also set to operate two direct flights in May to repatriate U.S. citizens.
The Covid-19 pandemic has spread to 210 countries and territories, claiming more than 218,000 lives.