Pre Covid air travel will take years
It's hard to imagine a quick snap back of air travel after the pandemic. Primarily, because the end of the pandemic will not be uniform across the globe. Many poor countries will still be struggling to get their citizens vaccinated amid a lack of medical infrastructure.
Meanwhile, there's the growing work-from-home convenience and a new mindset of living, working and playing at a nice place where you don't have to fly away from. No need to be hooping back and forth across the skies for a vacation, a business meeting or whatever. Putting up with Covid testing, quarantine, face masks, baggage drills, security checks, visa, immigration controls, long queues has morphed into a debilitating drag on the senses.