TRAVEL

The fleet and hubs of United Airlines

A United Airlines Boeing 787-8 taxies for departure at Denver International Airport in July 2013.
A United Airlines Boeing 787-8 taxies for departure at Denver International Airport in July 2013.
Jeremy Dwyer-Lindgren, Special For USA TODAY
This image provided by United shows the carrier's first Boeing 777-300ER widebody jet.
This image provided by United shows the carrier's first Boeing 777-300ER widebody jet.
United Airlines/Tim Stake
A United Airlines Boeing 737-700 taxies to the gate after arriving at Fukuoka Airport in Fukuoka, Japan, in January 2015.
A United Airlines Boeing 737-700 taxies to the gate after arriving at Fukuoka Airport in Fukuoka, Japan, in January 2015.
Jeremy Dwyer-Lindgren, Special For USA TODAY
A United Airlines Boeing 737-800, painted in a special Star Alliance livery, takes off from Reagan National Airport in May 2015.
A United Airlines Boeing 737-800, painted in a special Star Alliance livery, takes off from Reagan National Airport in May 2015.
Jeremy Dwyer-Lindgren, Special For USA TODAY
A United Express Embraer E145 regional jet lands at Houston George Bush Intercontinental Airport in June 2015.
A United Express Embraer E145 regional jet lands at Houston George Bush Intercontinental Airport in June 2015.
Jeremy Dwyer-Lindgren, Special For USA TODAY
A United Express Bombardier CRJ-700 regional jet lands at Houston George Bush Intercontinental Airport in June 2015.
A United Express Bombardier CRJ-700 regional jet lands at Houston George Bush Intercontinental Airport in June 2015.
Jeremy Dwyer-Lindgren, Special For USA TODAY
A United Express Embraer E170 jet prepares for departure from Chicago O'Hare International Airport in June 2015.
A United Express Embraer E170 jet prepares for departure from Chicago O'Hare International Airport in June 2015.
Jeremy Dwyer-Lindgren, Special For USA TODAY
A United Airlines Boeing 767-400 takes off from Seattle-Tacoma International Airport in September 2015.
A United Airlines Boeing 767-400 takes off from Seattle-Tacoma International Airport in September 2015.
Jeremy Dwyer-Lindgren, Special For USA TODAY
United Airlines jets line Terminal 7 at Los Angeles International Airport on Nov. 8, 2015.
United Airlines jets line Terminal 7 at Los Angeles International Airport on Nov. 8, 2015.
Jeremy Dwyer-Lindgren, Special For USA TODAY
A United Airlines Boeing 757-200 takes off from sunny Los Angeles International Airport in November 2015.
A United Airlines Boeing 757-200 takes off from sunny Los Angeles International Airport in November 2015.
Jeremy Dwyer-Lindgren, Special For USA TODAY
A United Airlines Bombardier CRJ-200 lands at Reno-Tahoe Airport on Feb. 14, 2016.
A United Airlines Bombardier CRJ-200 lands at Reno-Tahoe Airport on Feb. 14, 2016.
Jeremy Dwyer-Lindgren, Special For USA TODAY
A United Airlines Boeing 737-900 rests at a gate at Seattle-Tacoma International Airport on March 12, 2016.
A United Airlines Boeing 737-900 rests at a gate at Seattle-Tacoma International Airport on March 12, 2016.
Jeremy Dwyer-Lindgren, Special For USA TODAY
Fresh spring foliage bids farewell to a United Express Embraer E170 as it departs Chicago O'Hare International Airport in April 2016.
Fresh spring foliage bids farewell to a United Express Embraer E170 as it departs Chicago O'Hare International Airport in April 2016.
Jeremy Dwyer-Lindgren, Special For USA TODAY
United Express tails line a terminal pier at Chicago O'Hare International Airport in April 2016.
United Express tails line a terminal pier at Chicago O'Hare International Airport in April 2016.
Jeremy Dwyer-Lindgren, Special For USA TODAY
United Airlines jets taxi through Chicago O'Hare International Airport in April 2016.
United Airlines jets taxi through Chicago O'Hare International Airport in April 2016.
Jeremy Dwyer-Lindgren, Special For USA TODAY
A United Airlines Boeing 767-300 lands at Amsterdam Schiphol Airport in August 2016.
A United Airlines Boeing 767-300 lands at Amsterdam Schiphol Airport in August 2016.
Jeremy Dwyer-Lindgren, Special For USA TODAY
A United Airlines Boeing 767-300 lands at Amsterdam Schiphol Airport in August 2016.
A United Airlines Boeing 767-300 lands at Amsterdam Schiphol Airport in August 2016.
Jeremy Dwyer-Lindgren, Special For USA TODAY
A United Airlines Boeing 787-9 takes off from Los Angeles International Airport on Sept. 24, 2016.
A United Airlines Boeing 787-9 takes off from Los Angeles International Airport on Sept. 24, 2016.
Jeremy Dwyer-Lindgren, Special For USA TODAY
A United Airlines Boeing 747-400 takes off from San Francisco International Airport in October 2016.
A United Airlines Boeing 747-400 takes off from San Francisco International Airport in October 2016.
Jeremy Dwyer-Lindgren, Special For USA TODAY
A United Airlines Boeing 757-300 lands at San Francisco International Airport in October 2016.
A United Airlines Boeing 757-300 lands at San Francisco International Airport in October 2016.
Jeremy Dwyer-Lindgren, Special For USA TODAY
A United Airlines Boeing 747-400 lands at San Francisco International Airport in October 2016.
A United Airlines Boeing 747-400 lands at San Francisco International Airport in October 2016.
Jeremy Dwyer-Lindgren, Special For USA TODAY
A United Airlines Boeing 777-200 - painted in a special Star Alliance livery - lands at San Francisco International Airport in October 2016.
A United Airlines Boeing 777-200 - painted in a special Star Alliance livery - lands at San Francisco International Airport in October 2016.
Jeremy Dwyer-Lindgren, Special For USA TODAY
A United Airlines Airbus A319 taxis at San Francisco International Airport in October 2016.
A United Airlines Airbus A319 taxis at San Francisco International Airport in October 2016.
Jeremy Dwyer-Lindgren, Special For USA TODAY
A United Airlines Boeing 777-200 taxies for departure from Chicago O'Hare International Airport in November 2016.
A United Airlines Boeing 777-200 taxies for departure from Chicago O'Hare International Airport in November 2016.
Jeremy Dwyer-Lindgren, Special For USA TODAY
A United Airlines Airbus A320 departs Canada's Vancouver International Airport in December 2016.
A United Airlines Airbus A320 departs Canada's Vancouver International Airport in December 2016.
Jeremy Dwyer-Lindgren, Special For USA TODAY
The new Polaris business-class cabin as seen on United Airlines' first Boeing 777-300ER widebody jet.
The new Polaris business-class cabin as seen on United Airlines' first Boeing 777-300ER widebody jet.
United Airlines
Chicago's Oak Street Beach and downtown skyline are seen in this undated photo. Chicago is United's busiest hub (by passengers).
Chicago's Oak Street Beach and downtown skyline are seen in this undated photo. Chicago is United's busiest hub (by passengers).
Patrick L. Pyszka, City Of Chicago
Chicago's skyline is seen as a United Airlines jet takes off from Chicago O'Hare on Sept. 19, 2014. In the distance is the Willis (Sears) Tower that's home to United's official headquarters.
Chicago's skyline is seen as a United Airlines jet takes off from Chicago O'Hare on Sept. 19, 2014. In the distance is the Willis (Sears) Tower that's home to United's official headquarters.
Scott Olson, Getty Images
An aerial view of the downtown Houston skyline from October 2014. Houston's Bush Intercontinental Airport is United's second-biggest hub (by passengers).
An aerial view of the downtown Houston skyline from October 2014. Houston's Bush Intercontinental Airport is United's second-biggest hub (by passengers).
Kirby Lee, USA TODAY Sports
A United Boeing 787 Dreamliner takes off within view of the Houston skyline. Houston Bush Intercontinental is United's second-busiest hub (by passengers).
A United Boeing 787 Dreamliner takes off within view of the Houston skyline. Houston Bush Intercontinental is United's second-busiest hub (by passengers).
James Nielsen, AP
The Manhattan skyline can be seen from Terminal C at Newark Liberty International Airport, which is United's third-busiest hub (by passengers).
The Manhattan skyline can be seen from Terminal C at Newark Liberty International Airport, which is United's third-busiest hub (by passengers).
Julio Cortez, AP
Travelers ride on the AirTrain at Newark Liberty International Airport, which is United's third-busiest hub (by passengers).
Travelers ride on the AirTrain at Newark Liberty International Airport, which is United's third-busiest hub (by passengers).
Julio Cortez, AP
The iconic roof structure at Denver International Airport, which is United's fourth-biggest hub (by passengers).
The iconic roof structure at Denver International Airport, which is United's fourth-biggest hub (by passengers).
Arina Habich, Getty Images/iStockphoto
A new 23-mile electric commuter rail line will link Denver'’s airport to downtown. Denver is United's fourth-biggest hub (by passengers).
A new 23-mile electric commuter rail line will link Denver'’s airport to downtown. Denver is United's fourth-biggest hub (by passengers).
Denver International Airport
The Golden Gate Bridge is seen with the city of San Francisco behind it. San Francisco is United's fifth-biggest hub (by passengers).
The Golden Gate Bridge is seen with the city of San Francisco behind it. San Francisco is United's fifth-biggest hub (by passengers).
Scott Chernis Photography
A United Airlines maintenance hangar is seen at San Francisco International, the carrier's fifth biggest hub by passengers.
A United Airlines maintenance hangar is seen at San Francisco International, the carrier's fifth biggest hub by passengers.
Ben Mutzabaugh, USA TODAY
The distinctive main terminal building of Washington Dulles is seen in October 2014. Dulles is United's sixth-busiest hub (by passengers).
The distinctive main terminal building of Washington Dulles is seen in October 2014. Dulles is United's sixth-busiest hub (by passengers).
Mark Wilson, Getty Images
Los Angeles International Airport -- and it's iconic LAX sign -- are seen in October 2013. LAX is United's seventh-busiest hub (by passengers).
Los Angeles International Airport -- and it's iconic LAX sign -- are seen in October 2013. LAX is United's seventh-busiest hub (by passengers).
AFP/Getty Images
An shot of the National Mall and the iconic buildings of Washington, D.C. Washington's Dulles airport is United's sixth-busiest hub (by passengers).
An shot of the National Mall and the iconic buildings of Washington, D.C. Washington's Dulles airport is United's sixth-busiest hub (by passengers).
Ron Edmonds, AP
The skyline of downtown Los Angeles is seen in December 2016. LAX is United's seventh-busiest hub (by passengers).
The skyline of downtown Los Angeles is seen in December 2016. LAX is United's seventh-busiest hub (by passengers).
EPA
The skyline of central Tokyo. United Airlines count's Tokyo's Narita Airport as one of its hubs.
The skyline of central Tokyo. United Airlines count's Tokyo's Narita Airport as one of its hubs.
Yoshikazu Tsuno, AFP/Getty Images
United Airlines counts Guam as a hub for its major presence in the Pacific and Micronesia. Here, a beach area of Guam is seen in an October 2015 photo.
United Airlines counts Guam as a hub for its major presence in the Pacific and Micronesia. Here, a beach area of Guam is seen in an October 2015 photo.
Mjf795, Getty Images/iStockphoto