Frontier Airlines is an American ultra low-cost carrier headquartered in Denver, Colorado. The airline is the eighth-largest commercial airline in the US and operates flights to over 100 destinations throughout the United States and 30 international destinations. The main hub is at Denver International Airport with numerous focus cities across the US.
As of April 2025, Frontier Airlines operates the following aircraft: Airbus A320, Airbus A320neo, Airbus A321.
Frontier Airlines is operating flights from/to 110 airports in 12 countries: United States, Puerto Rico, Dominican Republic, Mexico, Guatemala, Jamaica, Sint Maarten, U.S. Virgin Islands, Aruba, Costa Rica and other destinations.