Why is a business first class ticket on United Airlines generally cheaper than Delta and American?

A business class ticket on United Airlines may be cheaper than those on Delta and American due to several factors, including pricing strategies, competition, and demand in specific markets. United may offer more promotional fares or discounts to attract business travelers, particularly in routes where they face strong competition. Additionally, differences in onboard services, amenities, and overall customer experience can influence pricing structures among the airlines. Each airline's yield management and capacity considerations also play a role in ticket pricing.