I'd happily jump on a plane to Malaysia, Hong Kong or Japan tomorrow, except being British I am not allowed to go.
These Asian countries have Covid much more under control by more extreme tough measures taken at an early stage. Their track & trace has been pretty good from Day1- as a result their economies aren't tanking like our. Problem areas- a street or a specific apartment block can be isolated within 12 hours of a test result-without the need to lockdown a whole city or region.
My very recent domestic flight had 6 pax one way & 7 the other. There is no restriction on taking domestic flights but load factors like that can't be sustainable.