The big difference with this disaster compared with 2008 is the fact the population has had the crap scared out of it. Going from social distancing to going through an airport and being crammed in a tube (already known to be unhealthy) is not something that will happen quickly. Without the cramming the airfares will be seen as very expensive.
For what it’s worth, I would get on a VS, DI, BA tomorrow given the choice. Many wouldn’t.