Not sure what you mean, globally there are no reductions in emissions. And you would have to phase out a lot more than just air travel. Personal cars too and overall reduce consumption like ten fold or more, basically destroy this whole capitalism-driven consumerist way of life.
This anti-capitalism stuff seems completely irrelevant too. Every economy is based on consumption, even socialist ones. The only reason the USSR didn’t have as many car owners as the USA is because their economy was in a permanent state of crisis. Market forces don’t go away when you implement socialism.
> Every economy is based on consumption
I'm talking about buying a tesla level of consumerism, that's not everyone in every economy, but relatively few and they are part of the problem, not part of the solution.
1. Create a competing product that people prefer over air travel.
2. Artificially increase the price through taxation.
3. Artificially decrease supply through regulation.
There’s nothing on the horizon for option 1, and since we live in a democracy, democratic mechanisms are the only means you have for 2 or 3, unless you wanted to resort to something like terrorism.
Your presupposition that we can’t have cheap air travel while avoiding catastrophic man-made climate change is in no way obviously true, and your suggested solution is a utopian fantasy.