Denver International Airport has most United 757-300 flights

United Airlines has shifted its Boeing 757-300 operations, with Denver International Airport now leading in scheduled flights for 2025, surpassing Chicago O'Hare. Denver will see 245 flights, while Chicago will have 233. The 757-300 is primarily used for domestic routes, with no international flights since 2020. The aircraft features amenities like Wi-Fi and power sockets, accommodating up to 234 passengers. Despite its age, the 757-300 remains in service with several airlines, including United, which operates 20 of the 21 it owns. The aircraft is expected to gradually be replaced by more fuel-efficient models in the coming years.