Due to runway project delays, commercial flights in and out of Cheyenne won't resume before Frontier Days as originally expected, the airport announced Tuesday.

Airport Deputy Director Nathan Banton says wet weather in April and May coupled with a cement shortage has set back the runway project at the airport.

"Our goal is to be back by Labor Day weekend," said Banton. "If it were just an issue of the wet spring, we wouldn't be far off schedule. What nobody could have predicted is a national supply issue with the low-alkaline cement needed to finish the runway project safely."

Banton says United Express customers with reservations in July and August will be contacted regarding re-ticketing and rescheduling through their original booking agencies.

He says the airport is also working closely with the Wyoming Air National Guard to mitigate and minimize impacts to C-130 operations.

As for the U.S. Air Force Thunderbirds show scheduled for CFD, Mayor Patrick Collins says local airport officials have helped the Air Force get use of the Fort Collins airport.

"We are going to experience a great air show," Collins said Friday in his Mayor's Minute column. "Working together, they got it done."

LOOK: VIntage Postcards Showing-Off Cheyenne Frontier Days Through the Years

Postcards have been a thing since the mid-1800s. Sending pictures and short messages on card-stock paper to friends and families really took off in the first half of the 20th century. While not quite as popular today, they still exist, and collecting postcards even has a special name, Deltiology.

Postcards were made for a lot of things, like vacation destinations and events. Cheyenne Frontier Days was the source of many. On the auction site eBay we found a lot of vintage postcards with fascinating pictures of Cheyenne and the Daddy of 'Em All.