OTTAWA—Deputy Prime Minister Chrystia Freeland says the federal government is “looking seriously” at tougher travel measures to fight the COVID-19 pandemic, including mandatory hotel quarantines for air travellers returning from non-essential trips abroad. “I would like to stress that we are taking this measure very, very seriously. We are considering the issue very, very seriously,” Freeland said in a news conference Monday in response to a question about the potential quarantine rule. Freeland’s remarks, given in French, build on Prime Minister Justin Trudeau’s publicly expressed openness earlier this month to tighter restrictions, sparking questions about how a stricter isolation regime would work. Successful pandemic repellers from South Korea to Australia require 14-day hotel quarantines for passengers arriving from abroad. In New Zealand, which had 64 active COVID-19 cases as of Monday, passengers head straight to a “managed isolation facility”—a hotel—if they have no symptoms or a “quarantine facility” if they …