A passenger mile and automobile mile emit about the same amount carbon, i.e. about a pound of CO2 per mile. Its just a single trans-ocean flight will exceed the amount of driving most do in a year. I dont think many people who go on these international eco-trips pay much attention to this. I have seen some disclaimers in adventurer documentaries that the makers purchased carbon offsets to make trips carbon neutral. Wink wink. Offset try to pay others to cut their consumption so you can increase yours. Or plant a certain number of trees.
Although ground transportation made great strides in employing renewable energy, its hard to see how air travel can. Planes have run off of biofuels. Its hard to see how a plane can store enough electromotive energy to be practical. Requires two orders of magnitude beyond what struggling ground EVs can do. Dsytopian scfi novels have air travel as an extreme luxury when carbon fuels run out, whenever that is.