Adam Belz @ StarTribune interviewed me about: Fewer travelers take off from MSP :

“Air travel was hurt by the April spike in fuel prices, said David Levinson, a professor at the University of Minnesota’s Center for Transportation Studies.
‘The price of fuel is certainly very volatile, and that doesn’t necessarily say something about the broader economy,’ Levinson said. ‘The sensitivity of enplanements is in part due to the airfares that are charged.'”

Domestic aviation is another sector that has matured and is likely near if not at peak. MSP’s position is not helped by the Delta near-monopoly in lots of markets, but at least we have a hub and direct flights.