The Federal Aviation Administration issued a "Notice to Airmen" warning that some airports would not have enough jet fuel through Monday. 

Flights were delayed at California's Santa Barbara airport, and some departing planes were forced to add stops for refueling last weekend. Meanwhile, the airport in Nantucket, Massachusetts, ran out of jet-A-grade fuel over the weekend. 

Those problems followed a similar situation last week at the airport serving Reno, Nevada, and Lake Tahoe. - Bloomberg

These problems are strictly labor challenges and not supply issues with jet fuel in U.S. inventory. As early as May, we noted semi-truck driver shortages may spark fuel shortages by summer.

"We've seen unprecedented demand for Jet-A on the island, both in our corporate general aviation and our commercial air carrier traffic," Nantucket's assistant airport manager Noah Karberg told Bloomberg.

"I expect we're going to have ongoing issues for Sundays throughout the rest of the summer," he said.