Mustard did an awesome analysis of this exactly this: Flying Cruise Ships, why we don’t have giant air ships

https://youtu.be/LyaYaFzSPac?si=hZ6HV0YuCOg-WUYT

Basically, the economics no longer work. Airships really can’t carry that much weight relative to their operational costs. They’re loud and they’re slow which isn’t a great customer experience. The amount of money you would have to pay for a ticket to make it economical would be more than a first class ticket on a modern jet, which would also get you there much faster.

(BTW all of Mustard’s videos are great. They have super high production value and are primarily about transportation technologies of the 50s 60s 70s and 80s. I recommend watching it on Nebula if you can.)