Frontier crew members discovered two threatening notes on a flight headed from Seattle-Tacoma International Airport to Denver, according to the airline.

Spirit Airlines is launching a new route connecting Fort Lauderdale to Key West, while Frontier Airlines is adding service to Richmond, Corpus Christi and Tulsa, all from Denver.

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. “With new destinations in Texas and Virginia,

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.

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.

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