UNITED STATES SECURITIES AND EXCHANGE COMMISSION | Commission File Number | Exact Name of Registrant as Specified in its Charter, Principal Executive Office Address and Telephone Number | | | | State of Incorporation | I.R.S. Employer Identification No. | | --- | --- | --- | --- | --- | --- | --- | | 001-06033 | United Airlines Holdings, Inc. | | | | Delaware | 36-2675207 | | | 233 South Wacker Drive, | | Chicago, Illinois | 60606 | | | | | (872) | 825-4000 | | | | | | 001-10323 | United Airlines, Inc. | | ...