Avelo Airlines

Casino Express Airlines

Entrepreneur Tod McClaskey owned the Red Lion Inn and Casino in Elko, Nevada. In 1986, he contracted with Royal West Airlines to fly charters to bring gamblers to Elko. In 1987, he established Casino Express Airlines. From 1987 to 1989, Casino Express operations were flown by contract carrier Spirit of America Airlines, prior to Casino Express receiving its own certificate in 1989. Casino Express operated 737 jet service from Elko Regional Airport nonstop to many cities in the US. In 1994, Casino Express was operating scheduled weekend-only flights nonstop between Elko (EKO) and Portland, Oregon, (PDX) and Seattle (SEA) with McDonnell Douglas MD-80 jetliners. For a short time in 1999, Casino Express Airlines operated one Boeing 737-200 jetliner for the start-up airline Tahoe Air, which provided scheduled passenger air service with nonstop flights from the South Lake Tahoe Airport to Los Angeles International Airport in southern California and also nonstop service to San Jose International Airport in northern California.

Xtra Airways

Casino Express quickly expanded its customer base to include sports teams, government agencies, foreign dignitaries, press corps, other gaming properties, and other types of public and private charters. It changed its name to Xtra Airways on December 8, 2005, to reflect its broader focus.

From 2007 through 2012, Xtra Airways dedicated two Boeing 737-400 aircraft to fly for Direct Air, an airline business based in Myrtle Beach, South Carolina.

Xtra Airways changed its aircraft livery in 2015 to an executive jet style, displaying flag blue and red stripes.

In September 2016, it began operating a Boeing 737-800 (registration: N881XA), repainted in a sky-blue and white livery with "Stronger Together" titles, for Hillary Clinton's 2016 presidential campaign. Soon afterward, a second aircraft, Boeing 737-400 (N314XA), was also chartered by the campaign, painted with a sky-blue stripe and "Clinton/Kaine" titles.

Avelo Airlines

Andrew Levy, former President of Allegiant Air and chief financial officer of United Airlines, acquired Xtra in August 2018, with the intent of transforming the charter airline into an ultra low-cost carrier. By that time, Xtra had sold most of its fleet to Swift Air, but kept one Boeing 737-400 to retain its FAA Part 121 Regularly Scheduled Air Carrier certification. By April 2019, the airline was considering operating Boeing 737-800s.

In February 2020, Levy announced the new holding company for Xtra, named Houston Air Holdings, Inc., reflecting the company's Houston headquarters. The same month, the company raised US$125 million in funding and received its first airplane from GE Capital Aviation Services ahead of its original plans to launch scheduled operations later in 2020.

On April 8, 2021, the new airline was announced under the name Avelo Airlines, and began selling tickets for flights based at Hollywood Burbank Airport in California. Its initial route network consisted of 11 unserved destinations from Burbank, launching between April 28 and May 20, 2021, with an initial fleet of three Boeing 737-800s, expanding to six by the end of 2021. Avelo's announcement of its entry into scheduled flight operations was met with competitive response initially from American and Alaska Airlines, with American upgauging to a larger Airbus A319 on its existing route between Phoenix Sky Harbor and Burbank, while Alaska announced a new service between Burbank and Santa Rosa to start on June 1, 2021. Avelo's inaugural flight occurred on April 28, 2021, which traveled from its Burbank base to Santa Rosa's Charles M. Schulz–Sonoma County Airport. The airline announced on July 7, 2021, that it would terminate its flights to Bozeman and Grand Junction by the end of September, while by July 29, 2021, the airline announced an additional five destinations including Fort Collins, Las Vegas, Monterey, Provo, and St. George, although the planned flights to Monterey, Provo, and St. George were later cancelled.

Following the airline's California launch in late April, Avelo announced on May 6, 2021, that it would open a new base at Tweed New Haven Airport in Connecticut during the third quarter of 2021. The airline additionally announced that it planned to invest US$1.2 million toward the New Haven airport's facilities, and that it would use Boeing 737-700 aircraft for its operations at the new base. On August 19, 2021, details of the airline's operations at its New Haven base were revealed, initially with four routes between New Haven and destinations in Florida announced to launch during November 2021. By the end of 2024, Avelo had expanded its service from New Haven to 26 destinations, making the airport its largest base.

On January 6, 2022, Avelo announced that it had raised an additional US$42 million. This second-round offering increased Avelo's invested capital base to over US$160 million. On April 14, 2022, the Association of Flight Attendants was certified as the exclusive representative of all of Avelo's 14 flight attendants after a vote under the Railway Labor Act was conducted by the National Mediation Board.