The state's major commercial airports experienced a drop in passenger departures in December, when holiday travelers typically pack flights.
At Oklahoma City's Will Rogers World Airport, outbound traffic was down 1 percent; Tulsa International Airport experienced a more than 5 percent dip.
Travelers spent cautiously last month because of uncertainty over the “fiscal cliff,” and that may have led some to forego air travel, a spokeswoman for Will Rogers World Airport said.
“The holidays themselves were busy, but the rest of the month was flat,” said spokeswoman Karen Carney. “We didn't really see a lot of growth from last year.”
Outbound passenger loads for the year rose 3.26 percent compared to 2011. Carney said they are projecting 2 percent growth for 2013.
Tulsa International Airport experienced a 2 percent drop in departing passengers last year.
Both airports are planning improvements.
At Will Rogers World Airport, the major project that will begin is a consolidated baggage inspection system.