If you can convince people they are not simply rebreathing the air and environment from first class even in coach then they will board the plane again.
Well people already taking to the sky now, even in countries where COVID still not completely under control. Especially for domestic market.
I believe I have posted before, the industry prediction whose going to take the flight first. Seems it's correct, the business travellers and the millennials tourists are mostly the ones that taking the flight.
Domestic flights passanger begin to reach more than 50% of pre COVID capacities. In Indonesia, the domestic flights to Bali full by Millennials even Foreign Expats that want to escape boredom of big cities like Jakarta.
Problem now is International Flights. Most countries still locked foreign tourists. Still if this's open, even with pandemic still going on, I believe at least 50% of Pre COVID International Flight capacities will be back soon.
Millennials seems doesn't care on what the Boomers and Gen X worries on the health safety in the Cabin. They simply buy the Airlines assurance on air filtering in Cabins. Millennials are the segment that want to travel more.
Thailand will open for International tourists by 1st of October. Bali's provincial government now lobbying hard to Indonesia central government to give Bali exemption from Central government International tourists lock down up to end of the year. Bali argues, that as their own local infection much lower than national average, they can have exemption.
We can see after Thailand opening their International Tourists, how much the appetite from global tourists back to Thailand. Even if reach only 50% International Flights, it shows that at least half of world population don't really care on the pandemic. That portion based on my prediction on current domestic tourists trend right now, which significantly fill by Millennials.
Add:
A month ago, some of us from different industries make an unofficial questionnaire to each our own staff on their feeling for traveling under COVID condition.
The results shown younger staff (millennials) are much more keen to take travels if company policies permit them ( now in Indonesia many companies tell their staff if they are taking travel they have to take 14 days quarantine after that, taking from their own annual leave quota).
Most of millennials saying that, we don't have diabetic, high blood pressure and Hart condition. Older guys that begin having that problem that should not take travels yet.
This kind of believe is quite strong on younger generation. For that eventough it's unofficial questionnaires and hardly scientific based, for me already shown the Millennials will fill the flights if they're given the opportunity.