DETROIT Non-essential between the United States and Canada has been banned since March amid the coronavirus pandemic. The border remaining closed to non-essential travel through at least June 21. Now, there are reports the ban on non-essential travel between the two countries could last until late July. In the more populated United States, cases are rising at vastly different paces depending on the state. The Detroit-Windsor Tunnel has been closed to non-essential travel since March 21, seemingly making it easier to complete a renovation of the tunnel.