More than 100 children, some of whom have serious health issues, were then taken on a roughly 45-minute flight near the city before landing back at Denver International Airport and being towed to a hangar transformed by United Airlines employees and volunteers into the North Pole.

Through Dec. 24, children can talk to Santa — all they need is access to amateur radio equipment. Children, also known as “little harmonics” in amateur radio lingo, can call “the North Pole” through Christmas Eve,

The event was part of United Airlines' annual holiday-season ‘fantasy flights’ at airports around the world to bring cheer to children and their families