United Airlines operates a regional subsidiary, United Express, which covers shorter routes across the United States. These services are carried out by smaller regional jets through subcontractors. The United Express network is not an airline itself but supports United Airlines by connecting smaller cities to major hubs.
"All United Express flights are marketed by United Airlines or a partner carrier," and they play a significant role in the airline's operations, accounting for approximately 6% of its total capacity in 2023. The flights are operated under Capacity Purchase Agreements with subcontractors like CommuteAir, GoJet, Mesa Airlines, Republic Airways, and SkyWest Airlines.
United Airlines manages schedules, ticket pricing, revenue generation, and loyalty programs for these flights. It may also increase capacity on certain routes by offering both mainline and regional services.