Allegiant Airlines canceled 12 flights in and out of Orlando-Sanford International Airport on Wednesday due to weather impacts stemming from Tuesday night, the airline said in a statement.

Hilarie Grey, a spokeswoman for Allegiant, said in an email statement that "an unanticipated change in weather" at about 9 p.m. Tuesday brought low visibility and caused 10 flights bound for Sanford to be diverted to other airports.

Twelve flights in and out of Orlando-Sanford were canceled Wednesday as the airline "works to return to normal operation in the area." That includes moving aircraft and crews that were out of position as a result of Tuesday's weather, Grey said.

Flights to Grand Rapids, Michigan; Youngstown, Ohio; and Allentown, Pennsylvania were among those canceled. 

"Passengers scheduled for travel on the affected flights will receive an automatic refund for the unflown segment of their itinerary," Grey said. "We sincerely apologize to our customers for the disruption to their plans, but the weather situation was unexpected and its impact on our operations in the area severe."

Daytona Beach International Airport also had canceled flights because of visibility issues Tuesday night and Wednesday morning. Some flights were canceled while another flight for Delta Airlines Wednesday morning had to be diverted to Orlando International Airport because of fog.