Spirit Airlines Book flights from Spirit Airlines on InsanelyCheapFlights.com and save up to $20* on your booking with today’s promo code. Fly Spirit to Detroit, Las Vegas, Chicago, Dallas and many other destinations in the U.S., Caribbean, Central and South America. Spirit Airlines is a low-cost carrier that will get you where you need to go and save you money in the process. In 2012, Spirit Airlines was named “Best Low-Cost Airline in North America" by Skytrax Airline Quality Research. The airline started flying in 1980 under the name Charter One, which was changed to Spirit Airlines in 1992. The airline’s official website is Spirit.com. Headquartered in Florida, Spirit has hubs in Fort Lauderdale and Dallas/Fort Worth, with a heavy presence at McCarran International Airport in Las Vegas. The airline operates 43 planes with flights to 52 destinations, and Spirit’s IATA code is NK.