Frontier is one of the largest budget carriers in the US. Headquartered in the city of Denver, Colorado, the ultra-low-cost airline prides itself in offering passengers low fares on point-to-point ...

DENVER -- Frontier Airlines is introducing a new upgrade seating option that would guarantee an empty middle seat. With the option, called Upfront Plus, passengers can choose either a window or aisle ...

Frontier Airlines is offering free carry-on bags, seat selection, and flight changes to attract customers. Frontier is also offering a free checked bag for flights departing between May 28 and Aug. 18 ...