United Airlines’ Top Hub: Chicago O’Hare International Airport
United Airlines is a dominant force in the U.S. commercial aviation industry, with a widespread presence across the nation’s airports. Unlike many European flag carriers that operate around a single hub, United has established a network of hubs to ensure broad coverage. According to recent scheduling data from Cirium, an aviation analytics company, United Airlines is scheduled to operate a total of 1,896,990 flights in 2026, offering 242,601,130 seats in the process. Among these, over 250,000 flights will originate from a single airport, making it the airline’s most significant hub.
Chicago O’Hare International Airport (ORD) stands out as United Airlines’ top hub by flights in 2026. With 250,306 United-marketed departures and more than 28.6 million seats available, O’Hare plays a crucial role in United’s operations. This month alone, the airport will serve 18,111 United-marketed departures, with just over half (9,323) being mainline services. The remaining flights are operated by three regional partners—GoJet, Republic, and SkyWest—as part of United Express feeder flights.
In terms of aircraft types, the Embraer E175 is the most commonly used model on United-marketed flights out of O’Hare, with 3,527 departures this month. This number is nearly double that of the top mainline aircraft, the Airbus A321neo, which has 1,825 departures. Newark (EWR) is the most frequent destination from O’Hare, with up to 12 flights per day in March. Omar Idris, United’s Vice President of ORD, emphasized the airline’s focus on customer loyalty in a January press release:
“We have spent the past decade building and executing a strategy that is focused on winning brand loyal customers by giving them more value when they fly United. Nowhere is that more apparent than in Chicago.”
Rounding Out The Top Five
Denver International Airport (DEN) is United’s second-largest hub by flights scheduled for 2026, with 194,200 departures. Unlike O’Hare, mainline operations dominate here, with regional services operated by SkyWest Airlines accounting for only a third of United’s flights. Houston (IAH) is the top destination from Denver, with up to 11 daily departures, and the Boeing 737-800 is the most frequently used aircraft in the city.
Houston George Bush Intercontinental Airport takes third place, with 176,734 flights and 21,970,701 seats on United-marketed routes this year. While mainline operations make up the majority of United’s presence here, regional services are split among three feeder operators: CommuteAir, Mesa Airlines, and Skywest. Chicago is its top route, with 11 daily flights.
Newark Liberty International Airport (EWR) ranks fourth, with 141,087 flights scheduled for 2026. Although this total is more than 20% lower than Houston’s, its annual seat capacity of 20,791,144 is only about 5.4% lower, indicating the use of larger aircraft. San Francisco (SFO) completes the top five, with 104,442 United flights in 2026, making it the last airport with a six-figure sum.
The Best Of The Rest
Moving into five-figure totals, there is a significant gap between sixth and seventh places. Washington Dulles International Airport (IAD) holds the sixth position with 95,037 flights, while Los Angeles International Airport (LAX) follows closely with 49,717 flights. Despite the difference in flight numbers, their seat totals are proportionally closer, with IAD offering 11,750,032 seats and LAX offering 8,131,846.
There is also a large jump down to eighth place, but the gaps become much smaller after that. Las Vegas (LAS) will handle 15,708 United flights this year, with a total very close to ninth-place Orlando’s (MCO) 15,448. Interestingly, Orlando offers more seats (2,837,730 vs. 2,758,962). Rounding out the top ten, Boston Logan International Airport (BOS) will see 13,912 United flights in 2026.
