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.
Frontier Airlines is operating flights from/to 114 airports in 13 countries: Bahamas, Jamaica, U.S. Virgin Islands, Antigua and Barbuda, Costa Rica, Puerto Rico, Guatemala, Mexico, Sint Maarten, Belize and other destinations.