What's "expensive" though? I've long found it tragicomic that I could buy tickets for a flight to a different country for less than a ticket for the 30 minute

What's "expensive" though? I've long found it tragicomic that I could buy tickets for a flight to a different country for less than a ticket for the 30 minute bus or train ride to the airport. I guess it's not quite that bad since Covid hit, but at least here in Norway train is often more expensive that flying between cities, including neighboring countries.