Oh, is that what they want? Denmark is not really the biggest country on Earth if one excludes Greenland and I would strongly assume that Greenland is not considered domestic for the sake of this scheme. Because I would really like to see a plane from Copenhagen to Nuuk with electricity only by 2030. Try to pull that over a larger country like France, or a truly large country such as the US. Virtue signaling already gets Norway into trouble and it will get the Danes too. Just let them have what they claim to want.
Denmark’s government wants to drop fossil fuels in domestic air travel by 2030 in its most recent push to meet its climate targets.