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United Airlines is moving ahead with plans to develop a major new flight training campus near 
Denver International Airport (DEN), a project that could eventually support up to 6,000 jobs while significantly increasing the airline’s pilot training capacity. The proposal, according to Denvertie, follows recent approval to rezone a 114-acre site and is expected to culminate in a new facility opening around 2030. The investment reflects United’s long-term growth strategy as it prepares for one of the largest fleet expansion programs in commercial aviation.
Rather than replacing its existing Denver training complex, the new campus will operate alongside it, creating one of the world’s largest airline training hubs. The development is expected to feature dozens of additional flight simulators, classrooms, office space, and employee facilities, reinforcing Denver’s position as both United’s fastest-growing hub and the center of its pilot training operations.
United’s Fleet Expansion Is Driving Demand For More Pilot Training
United Airlines
United’s latest project follows unanimous approval from Denver City Council to rezone approximately 114 acres close to DEN. Plans submitted by the airline indicate the site could ultimately accommodate more than one million square feet of buildings, including up to 60 full-flight simulator bays spread across four structures. Construction is expected to begin in 2027, with the facility targeted to enter service around 2030.
The investment is closely tied to United’s ambitious fleet renewal program. The airline expects to receive around 700 new aircraft by 2033, including variants such as the Airbus A321neo, A321XLR and Boeing 787 Dreamliner, substantially increasing the number of pilots requiring both initial and recurrent simulator training. In planning documents, United said the influx of aircraft would require “a significant increase in flight training center capacity,” making additional infrastructure essential to support future operations.
Simple Flying reached out to United for a comment, but a representative was not immediately available.
Denver Is Already The Heart Of United’s Pilot Training Network
The expansion builds on what is already one of the aviation industry’s largest training operations. In 2024, United opened a new 150,000-square-foot simulator building at its existing Denver Flight Training Center, increasing the campus to more than 700,000 square feet across eight buildings. The complex currently houses 46 full-motion simulators, with capacity for 52, and can conduct more than 32,000 training events annually, training as many as 860 pilots every day.
Every one of United’s 18,000-plus pilots must return to Denver for recurrent simulator training more than once each year, generating an estimated 31,000 annual visits to the city. The airline says Denver is now its fastest-growing hub, while United remains the city’s largest private employer. The existing Quebec Street training center will continue operating after the new campus opens, allowing both facilities to work together as pilot numbers continue to rise.
Beyond pilots, the existing training center supports instructors, evaluators, engineering teams, scheduling staff, and operational specialists. United previously disclosed that more than 1,600 employees already work at the current training campus, illustrating the scale of resources required to support one of the world’s largest airline fleets.
Training Infrastructure Has Become As Important As New Aircraft
The project highlights a challenge facing airlines worldwide. While manufacturers continue increasing aircraft production, pilot training capacity has become an increasingly important bottleneck. Every new aircraft entering service requires additional crew, simulator sessions and instructor resources before it can generate revenue, meaning airlines must expand training infrastructure alongside their fleets.
United has been investing heavily in its Denver operation in recent years. The carrier has spent nearly $1 billion on airport facilities, gates, lounges and customer infrastructure, while simultaneously expanding its training center and purchasing the new development site for approximately $33 million in 2023. Together, these investments support the airline’s broader United Next strategy, which includes one of the largest aircraft order books among global carriers.
If completed on schedule, the new campus will become one of the world’s largest dedicated airline training facilities. Combined with United’s planned fleet of hundreds of additional aircraft and Denver’s continued growth as a hub offering more than 500 daily departures and service to over 175 destinations, the investment underscores the airline’s expectation that demand for air travel, and the pilots needed to support it, will continue growing well into the next decade.
