Frontier Airlines was founded in response to the hole created in the wake of Continental Airlines (now United Airlines) closing the Denver Stapleton Airport hub. Utilizing Boeing 737 jetliners, Frontier Airlines began operating a couple of routes that ran between Denver along with North Dakota and gradually added more cities. One thing that differentiates Frontier from its rivals is its status as an inexpensive airline. The result is that the prices are generally low, and passengers only need to buy a ticket, which includes the flight as well as one personal item. Another aspect that one of the things that make Frontier distinguish itself from the rest of the pack is its dedication to the environmental aspect. It has resulted in Frontier being called the United States Greenest Airline. They also offer a service to families, and they offer complimentary flights for children who are 14 or less on eligible flights. They are also well known for its distinctive frequent flier program called FRONTIER Miles, which allows passengers to earn miles for each mile they drive. The Airline operates an Airbus fleet, which allows them to make significant savings in fuel usage in comparison to other US airlines due to their seating arrangements as well as weight-saving strategies and baggage handling. This is crucial because they’re an airline that is budget-friendly and needs to be able to charge customers as low as they can to pay for their expenses.