The border between the United States and the Schengen Area (which comprises 22 of the 27 member states of the European Union, plus 4 non-EU European countries) was closed by the US government on March 13 2020.
On January 18 2021, President Trump signed a new order that would've terminated all restrictions on travelers from the Schengen Area, effective January 26 2021. However, incoming President Biden amended this decision, stating that restrictions "shall remain in effect until terminated by the President".
When will the US-EU border reopen?
Resolution date will be the first day when people who were physically present within the Schengen Area during the 14-day period preceding their entry or attempted entry into the US are subject to no special restrictions that were not already in place before the start of the pandemic, with the exception of requiring a negative COVID-19 test prior to boarding (PCR, antigen, or similar). In particular, a date when only people who have been vaccinated against COVID-19 are allowed to enter the US will not qualify for positive resolution.
Resolution will be based on announcement by the US government or credible media reports.