Union Vows to Protect Jobs Amid Allegiant-Sun Country Merger

CENTENNIAL, CO – February 11, 2026 – Just as aircraft mechanics at Sun Country Airlines reached a milestone labor agreement after years of difficult negotiations, the ground has shifted beneath them. A recently announced merger between Allegiant and Sun Country has introduced profound uncertainty, prompting the mechanics' union to issue a stern warning that it will vigorously defend jobs, safety standards, and seniority rights against any erosion from the corporate consolidation.

The Aircraft Mechanics Fraternal Association (AMFA) announced last week it had secured a four-year tentative agreement with Sun Country, marking the first-ever collective bargaining agreement for the airline's approximately 200 technicians and related skilled professionals. The deal, however, comes just weeks after Allegiant Travel Company unveiled a $1.5 billion plan in January to acquire Sun Country, a transaction that promises to create a new powerhouse in the U.S. leisure travel market.

While the merger awaits approval from the Department of Justice and shareholders, AMFA is making its position clear. The union is closely scrutinizing the deal's potential impact on its members, who are critical to the safe operation of the airline's fleet.

"AMFA's priority is to ensure that any integration protects jobs, maintains high safety standards, and respects the contractual and seniority rights of the Aircraft Maintenance Technicians and skilled maintenance professionals," stated Bret Oestreich, the union's National President. He affirmed AMFA's readiness to collaborate with management but added the union will "firmly oppose any attempt to use this merger to weaken jobs, benefits, or safety standards."

A Hard-Fought Victory Meets a New Challenge

The tentative agreement between AMFA and Sun Country is the culmination of a protracted and often contentious process. AMFA was first certified to represent the workgroup in June 2022, but negotiations for a first contract stretched over three years. The union accused management of employing "delay tactics," leading AMFA to request federal mediation in October 2023 to break the deadlock.

As talks remained sluggish, tensions escalated. In January 2025, Sun Country mechanics voted overwhelmingly to authorize a strike, a move that empowered union leadership to request a release from federal mediation—the final step before a legal work stoppage could occur under the Railway Labor Act. This pressure ultimately brought both sides to the table, resulting in the current tentative agreement which promises significant improvements in wages, benefits, and crucial job protections against outsourcing.

Yet, this hard-won victory is now overshadowed by the impending merger. The deal, expected to close in the second half of 2026, would combine two airlines with distinct operational models and, critically, different union representations across their workforces, setting the stage for complex and potentially fraught integration battles.

Navigating a Complex Labor Landscape

The merger's success hinges not only on regulatory approval but also on navigating a fragmented labor landscape. Unlike a simple acquisition, this deal brings together employee groups represented by a patchwork of different unions, a situation that history shows can lead to significant conflict.

For aircraft mechanics, the divide is stark: Sun Country's technicians are represented by the craft-specific AMFA, while Allegiant's mechanics are represented by the International Brotherhood of Teamsters (IBT). This disparity means that once the merger is finalized and the airlines begin integrating into a single carrier, a representation election will likely be required under the oversight of the National Mediation Board (NMB) to determine which union will represent the combined workforce.

This complexity extends to other key front-line groups:

• Pilots: Represented by the Air Line Pilots Association (ALPA) at Sun Country and the Teamsters at Allegiant.
• Flight Attendants: Represented by the Teamsters at Sun Country and the Transport Workers Union of America (TWU) at Allegiant.

This intricate web of representation guarantees that integrating contracts and, most contentiously, seniority lists will be a monumental task. The process is governed by federal law, but it often requires lengthy arbitration and can be a major source of friction and morale issues for years following a merger.

Echoes of Past Airline Consolidations

The history of U.S. airline mergers is littered with examples of labor integration challenges. The 2013 merger of American Airlines and US Airways, for instance, demonstrated how unions can be kingmakers but also how post-merger integration can be a minefield. In that case, unions helped drive the merger, but the subsequent process of merging seniority lists, particularly for pilots, was a drawn-out and acrimonious affair that required years of arbitration to resolve.

Seniority is the bedrock of an airline employee's career, dictating everything from schedules and base assignments to protection from furloughs. Under the McCaskill-Bond Amendment, federal law mandates that seniority integration must be "fair and equitable," but the interpretation of that standard is often the subject of intense debate between different employee groups.

AMFA's proactive stance reflects lessons learned from these past consolidations. By immediately demanding transparency, good-faith dialogue, and a commitment to protecting contractual rights, the union is signaling to both Allegiant and Sun Country management that labor will not be a passive bystander in this process. The union has explicitly stated that the merger announcement will not delay the ratification vote on its new contract with Sun Country, ensuring that its members will have an established set of terms and conditions to defend as the integration process unfolds.

While industry analysts largely expect the merger to clear regulatory hurdles due to the minimal direct route overlap between the two carriers, the true test will come later. The challenge will be to combine not just fleets and route networks, but cultures and legally binding labor contracts. AMFA has drawn its line in the sand, emphasizing that the safety of the flying public and the livelihoods of its skilled members are non-negotiable, setting a tone of vigilant oversight for the months ahead.