That will certainly be difficult for staff who lose their jobs, and the owners whose companies have gone up in smoke. Still, with spare planes, crews and runways plus that still existing desire to go see the world, new companies are sure to spring up to fill the gaps left by the companies that have gone under. Say’s Law, that supply creates demand, isn’t really wholly true. But the inverse, that demand calls forth supply of something technically possible, is. Especially when the landscape is littered with the supplies necessary to make it possible.
However many airlines go bust in this difficult time it’s simply not going to change, in any medium or long term sense, the general ability to fly off somewhere. Simply because it’s observably true that people like doing it, it’s known how to do it, therefore it will be done by those eager to profit.
The worse it becomes for extant – and soon not to be extant – airlines the easier it will be in the near future for a new one to be set up by any would-be entrepreneur with a bit of get up and go. After all, whatever the fallout of this dreadful period, Covid-19 is surely not going to kill off the greed of capitalists?