Wizz Air has stopped all of its flights from Varna Bulgaria as the coronavirus pandemic continues to batter the airline industry. Company officials said flights would not be resumed before May 1 and that they would automatically credit the accounts of passengers who couldn’t travel to a level of 120 percent of the price they paid for their tickets. Passengers will be given two years to use those credits, although those who prefer a simple refund will be able to apply for them through the organization that sold them the ticket.