I never really bought this argument. Poor people aren't taking regular flights or driving SUV's. Climate change is a problem caused by the consumption habits of the wealthy, not the poor.
They won't connect every city, and connection flights are a no-no, but direct point to point flights are cheaper than anything else. Cheap flights across Europe is what allows a lot of low wage migrants to find seasonal work, students and young workers to travel and visit the cities etc.
The rich fly in expensive airlines, not with ryanair. Check this out: Paris to Bratislava, round trip for 80 bucks https://www.ryanair.com/us/en/trip/flights/select?adults=1&t...
Paris to Bratislava by train is 100 bucks one way (also taking much longer) https://www.raileurope.com/en-us/destinations/paris-bratisla...