I'm not convinced by the propensity to fly argument for the reason CWL is failing. Pre-covid in 2019 CWL had 1.63 million passengers which was continually creeping up from the 1m passengers in 2014. 2019 was up 4.3 percent than 2018.
This is quite an interesting document created in 2020 by the Welsh Government, covering pre-covid numbers.
https://www.gov.wales/sites/default/...t-2019-397.pdf
According to BRS masterplan created in 2017 20% of BRS passengers travel from South Wales of it's then 8m yearly passengers. That's around 1.6m passengers.
Currently BRS is nearing 10m passengers and if the 20% still stands that 2m Welsh people using BRS, if not more since Covid and CWL's decline.
The key for CWL is to win back those passengers from BRS, firstly starting with routes currently served from both Airports, then target new routes once momentum builds. And that is just when looking at BRS. There's still plenty of people from South Wales flying from Birmingham, Manchester and London that can be won back.
What CWL needs to the core scheduled routes to be at decent prices and good times to create that initial attraction to look at CWL when booking flights.