Allegiant Travel Group has closed on its $1.5 billion purchase of Sun Country.
The new combination of Allegiant Air and Sun Country has a fleet of 195 aircraft, serving nearly 175 cities on more than 650 routes.
For now, nothing will change from a consumer-facing perspective. Allegiant said that the airlines will operate as separate carriers for the near term. Eventually, the Sun Country brand will be retired when the combined company obtains a single operating certificate.
Customers will continue to book through existing Allegiant and Sun Country channels, and there are no changes to flight schedules or current reservations. The Allegiant Allways Rewards program and Sun Country Rewards will also remain for now.
"Over time, Allegiant expects to introduce additional benefits that make it easier for customers to access the combined network," the company said in a press release. "The combined company is committed to a thoughtful and disciplined integration process focused on maintaining safe, reliable operations and delivering a consistent customer experience."
Sun Country's base in Minneapolis will remain a key operation for the combined company, Allegiant added.
The merger brings more consolidation to the U.S. ultralow-cost carrier sector, following the closing of Spirit Airlines on May 2. Frontier and Avelo are the other remaining U.S. ULCCs.
Unlike those airlines, both Allegiant and Sun Country have been profitable since the pandemic. Allegiant expects the merger to bring $140 million in annual synergies within three years of closing and integration, driven by scale efficiencies, fleet optimization and improved buying power.
Additions to Allegiant's assets
With the purchase of Sun Country, Allegiant Travel Group adds its first international destinations, inheriting Sun Country's 18 routes to destinations in Canada, Mexico, Central America and the Caribbean.
In addition, the group now includes Sun Country's sizeable charter and cargo operations. Sun Country spent 2025 focusing on growing its cargo network, which includes a multiyear contract with Amazon Prime Air as well as partnerships with casinos, the Department of Defense and Major League Soccer.
Allegiant said it is making no immediate changes to frontline staffing roles and operational employees will continue in their current positions.
"The company will work closely with labor representatives throughout the integration process, and all existing collective bargaining agreements will remain in place," Allegiant said. "At the corporate level, some roles may overlap as functions are integrated. Any potential changes will be evaluated carefully, with a focus on fairness, respect and clear communication."
With the closing, Sun Country stock has ceased trading on the Nasdaq exchange.