Well, air safety is heavily managed by the federal government through the FAA, NTSB, industrial regulations, and who knows what else, so it’s quite fair for the head of the federal government to take credit for it.
Of course, he didn’t do anything and the trend predates him by a LOT, but just not breaking stuff is an accomplishment of sorts. I’d rather see a President take credit for something the government does control(air safety) rather than something it doesn’t(gas prices, the economy).