Not under 1000, I won't do it
With the campaign "not under 1000, I won't do it", various actors on social media are calling for people to give up (work-related) short-haul flights. The campaign was launched by participants of the K3 - Congress on climate change, Communication and Society 2019 in Karlsruhe. Researchers can make a personal commitment to avoid short-haul flights from 29/11/19 to 29/02/20 here.
There's also an international pledge including an interactive map for reducing or giving up flying altogether.