"(Re)nationalized airlines should be planned as part of a broader transportation system, with the goal of reducing unnecessary air travel, particularly on short-haul routes, to achieve emissions reductions. Ideally, this would be in conjunction with a rail system that is also returned to public ownership, which would allow for improvements to reliability, frequency, and a reduction in ticket prices to encourage people to use trains instead of cars and planes."
https://jacobinmag.com/2020/03/nationalize-airline-industry-coronavirus-climate-emissions