Frontier Airlines has cancelled more than 60 flights through the weekend including nine arriving and nine departing flights at Denver International Airport.The airline cancelled 17 flights Saturday and 47 flights on Sunday, according to Frontier Airlines Director of Corporate Communications Peter Kowalchuk.

Frontier subcontracted flights with other carriers in order to reduce the number of cancellations for Saturday’s flights to 17, Kowalchuk said. The option to subcontract flights on Sunday was not available, which is why the canceled flights are higher.The airline said 18 of its 59 Airbus planes and two turbo-props were damaged in the storm that hit Denver International Airport, Kowalchuk said. Five planes returned to service Saturday, with another aircraft expected to return to service later in the day. Others planes were being moved to maintenance bases around the country for repairs that could take longer.

The planes sustained damage ranging from dents to tears caused by ping pong sized hail, said a Frontier spokesman. The airline said it will take three to five days to repair a majority of the planes.Frontier urged travelers to check their flight status online and not to call the airline directly about flights.Frontier said it was waiving change fees for those who need to reschedule their flights. If passengers choose to rebook or cancel, they can contact the airline any time before midnight on July 19.