Travel Airlines look to ‘travel bubbles’ for COVID-19 safety and to restart international routes October 23, 2020October 25, 2020Chris Woodyard, USA TODAYComments Off on Airlines look to ‘travel bubbles’ for COVID-19 safety and to restart international routes Air bubbles and sky bridges. Whatever you call it, the concept is to use testing to make sure the coronavirus doesn't make its way onto flights.