Allegiant again - This time a pressurization issue - Probably an MD80 - Curt Lewis

Emergency Declared on Flight to Indiana, Plane Diverted

 The emergency was declared due to a pressurization issue, the airline said

An airline ground worker guides an incoming Allegiant Air jetliner at McCarran International Airport, in Las Vegas in this Thursday, May 9, 2013 file photo.

An emergency was declared on a flight from Orlando to Indianapolis Wednesday morning for a pressurization issue, forcing the plane to be diverted.

Allegiant Air Flight 758, with 155 passengers and six crew members onboard, landed safely at Jacksonville International Airport just before 8:45 a.m., according to the airline.

The aircraft was taken out of service and was scheduled to be inspected by maintenance. The cause of the pressurization issue was not immediately known.

A replacement aircraft was being sent to the Jacksonville airport and is scheduled to depart at 12:40 p.m., arriving in Indianapolis two hours later.

The airline said passengers will be given the option to change their flight and will receive $50 travel vouchers from the company.