Editing United Airlines (section)

=== Headquarters and other facilities ===
[[File:Willis Tower.jpg|thumb|upright|United Airlines Holdings World Headquarters, [[Willis Tower]]]]

United Airlines headquarters are located at the [[Willis Tower]], 233 South Wacker Drive, Chicago, Illinois.<ref name="headquarters">{{Cite web |title=Headquarters Location |url=https://www.united.com/ual/en/us/fly/contact/headquarters.html |url-status=live |archive-url=https://web.archive.org/web/20201001170115/https://www.united.com/ual/en/us/fly/contact/headquarters.html |archive-date=October 1, 2020 |access-date=October 20, 2019}}</ref>

In 2007, United had moved its headquarters from [[Elk Grove Township]], a suburb of Chicago, to [[77 West Wacker Drive]] in the [[Chicago Loop]]<ref name="Crains">{{Cite magazine |last1=Thomas A. Corfman |last2=Greg Hinz |date=July 13, 2006 |title=United HQ heading for Chicago |url=http://www.chicagobusiness.com/article/20060713/NEWS12/200021317 |magazine=[[Crain's Chicago Business]] |access-date=February 18, 2018}}</ref> after receiving US$5.5 million in incentives from the City of Chicago.<ref name="Incentives" />
 
Then in 2010, United accepted the City of Chicago's offer of US$35 million in incentives, including a US$10 million grant, for United to move its remaining 2,500 employees out of Elk Grove Township to the [[Willis Tower]] (formerly the Sears Tower) in the Chicago Loop.<ref name="Incentives">{{Cite news |last=Monica Davey |date=May 4, 2010 |title=Chicago Wins Prize as Home of Big Carrier |work=[[The New York Times]] |url=https://www.nytimes.com/2010/05/05/business/05united.html?_r=1&src=busln |url-status=live |access-date=February 18, 2018 |archive-url=https://web.archive.org/web/20180729171125/https://www.nytimes.com/2010/05/05/business/05united.html?_r=1&src=busln |archive-date=July 29, 2018}}</ref> On May 31, 2012, United opened its operations center, which occupied twelve floors there.<ref>{{Cite news |last= |date=2012-08-13 |title=United Airlines To Move Corporate Headquarters To Willis Tower |work=[[CBS News]] |url=https://www.cbsnews.com/chicago/news/united-to-move-corporate-headquarters-to-willis-tower/ |url-status=live |access-date=2023-11-01 |archive-url=https://web.archive.org/web/20120623164026/http://www.suntimes.com/business/13269459-420/united-shows-off-new-downtown-operations-center.html |archive-date=June 23, 2012}}</ref>
In 2019 United renewed its lease at Willis Tower, originally ending in 2028 and now set to expire in 2033, and plans to construct a roof deck and a {{convert|30,000|foot2|abbr=on}} dining hall on the fourth floor.<ref>{{Cite news |last=Ori, Ryan |title=Column: United Airlines extends HQ lease at Willis Tower until 2033 |work=[[Chicago Tribune]] |url=https://www.chicagotribune.com/business/columnists/ori/ct-biz-united-airlines-stays-at-willis-tower-ryan-ori-20190312-story.html |url-status=live |access-date=April 24, 2019 |archive-url=https://web.archive.org/web/20190424105311/https://www.chicagotribune.com/business/columnists/ori/ct-biz-united-airlines-stays-at-willis-tower-ryan-ori-20190312-story.html |archive-date=April 24, 2019}}</ref>

The former headquarters campus at Elk Grove Township was gradually annexed into the [[Mount Prospect, Illinois|Village of Mount Prospect]],<ref>{{Cite web |date=May 16, 2012 |title=Mount Prospect annexes part of United campus |url=http://www.dailyherald.com/article/20120516/business/705169767/ |url-status=live |archive-url=https://web.archive.org/web/20170807075444/http://www.dailyherald.com/article/20120516/business/705169767/ |archive-date=August 7, 2017 |access-date=July 8, 2017 |publisher=[[Daily Herald (Arlington Heights)|Daily Herald]] ([[Arlington Heights, Illinois]])}}</ref><ref>{{Cite web |date=January 19, 2017 |title=Mount Prospect annexes United property, 44 more acres |url=http://www.dailyherald.com/article/20170119/news/170118740/ |url-status=live |archive-url=https://web.archive.org/web/20170807080254/http://www.dailyherald.com/article/20170119/news/170118740/ |archive-date=August 7, 2017 |access-date=July 8, 2017 |publisher=[[Daily Herald (Arlington Heights)|Daily Herald]] ([[Arlington Heights, Illinois]])}}</ref> and serves as an IT operations facility, with a new {{convert|172,000|foot2|abbr=on}} data center constructed in 2013.<ref>{{Cite web |last=Mayer |first=Richard |date=August 14, 2013 |title=What Future Holds For Near-Empty United Site |url=https://www.journal-topics.com/articles/what-future-holds-for-near-empty-united-site/ |url-status=live |archive-url=https://web.archive.org/web/20130817130743/http://www.journal-topics.com/news/article_1aceeb92-0482-11e3-b247-001a4bcf6878.html |archive-date=August 17, 2013 |access-date=2023-10-31 |website=journal-topics.com |publisher=Journal & Topics Media Group}}</ref>

United maintains a large presence in downtown Houston, having leased {{convert|225,000|foot2|abbr=on}} of space (seven floors) for occupancy in 2017.<ref>{{Cite news |last=Mulvaney |first=Erin |date=February 25, 2016 |title=United to lease space in new downtown high-rise |work=Houston Chronicle |url=http://www.houstonchronicle.com/business/real-estate/article/United-to-lease-space-in-new-downtown-high-rise-6854965.php |url-status=live |access-date=July 8, 2017 |archive-url=https://web.archive.org/web/20170703063517/http://www.houstonchronicle.com/business/real-estate/article/United-to-lease-space-in-new-downtown-high-rise-6854965.php |archive-date=July 3, 2017}}</ref>

United has training facilities for its flight crews in Denver and Houston, a major aircraft maintenance center in San Francisco, and call centers in Houston and Chicago.