Law enforcement and fire officials were investigating a potential threat on a plane at Denver International Airport, but police later said the threat was unfounded.

Khabib Nurmagomedov shares the reason behind his removal from a Frontier Airlines flight: he was rushing to his favourite Pakistani restaurant before it closed.

Denver-based Frontier Airlines is adding four new nonstop routes this fall from Denver International Airport, increasing its total number of nonstop flights from DIA to 72 destinations.

Starting Oct. 7, low-cost carrier Frontier Airlines is expanding its network with 15 different routes, according to the airline. Best of all, Frontier is celebrating with introductory fares as low as $29.

If you frequently fly Frontier and don't mind paying an annual fee, it may be worth picking up the airline's card. But you don't need it to earn a companion pass.