EX-21 12 ual_12312410kex21.htm EX-21
Exhibit 21
Uni ted Airlines Holdings, Inc. and United Airlines, Inc. Subsidiaries
(as of February 27, 2025)

Entity | Jurisdiction of Incorporation
United Airlines Holdings, Inc. | Delaware
Wholly-owned subsidiaries*: |
United Airlines, Inc. | Delaware
| ● Air Wis Services, Inc. | Wisconsin
|  | ● Air Wisconsin, Inc. | Wisconsin
|  | ● Domicile Management Services, Inc. ** | Delaware
| ● CAL Cargo, S.A. de C.V.** | Mexico
| ● CALFINCO Inc. | Delaware
|  | ● CALFINCO Caymans Ltd. | Cayman Islands
| ● Century Casualty Company | Vermont
| ● Continental Airlines de Mexico, S.A.** | Mexico
| ● Continental Airlines, Inc. Supplemental Retirement Plan for Pilots Trust Agreement | Delaware
| ● Covia LLC | Delaware
| ● Mileage Plus Holdings, LLC | Delaware
|  | ● MPH I, LLC | Delaware
|  |  | ● Mileage Plus Marketing, Inc. | Delaware
|  | ● Mileage Plus, LLC | Delaware
|  | ● Mileage Plus Intellectual Property Assets, Ltd. *** | Cayman Islands
|  | ● Mileage Plus Intellectual Property Assets Aggregator, Ltd.****** | Cayman Islands
|  | ● Mileage Plus Intellectual Property Assets Holdings UIP, Ltd. | Cayman Islands
|  | ● Mileage Plus Intellectual Property Assets Holdings MIP, Ltd. | Cayman Islands
|  | ● Mileage Plus Intellectual Property Assets SPV Partner, Ltd.**** | Cayman Islands
|  | ● Mileage Plus Intellectual Property Assets GP S.à r.l.***** | Luxembourg
|  | ● Mileage Plus Intellectual Property Assets Lux 1 SCS***** | Luxembourg
|  | ● Mileage Plus Intellectual Property Assets Lux 2 SCS***** | Luxembourg
| ● Presidents Club of Guam, Inc. | Delaware
| ● UABSPL Holdings, Inc. | Delaware
| ● UAL Benefits Management, Inc.** | Delaware
| ● United Aviation Fuels Corporation | Delaware
| ● United Airlines Ventures, Ltd. | Cayman Islands
| ● United Airlines Ventures Management LLC | Delaware
| ● United Airlines Business Services Private Limited** | India
| ● United Ground Express, Inc. | Delaware
| ● United Travel Services, LLC | Delaware
| ● United Vacations, Inc. | Delaware
| ● Westwind School of Aeronautics, Phoenix, LLC | Delaware

*Subsidiaries of United Airlines Holdings, Inc. are wholly owned unless otherwise indicated
**Domicile Management Services Inc. is 99.9% owned by Air Wis Services, Inc. and 0.1% owned by United Airlines, Inc. CAL Cargo, S.A. de C.V. is 99.99% owned by United Airlines, Inc. and .01% owned by CALFINCO Inc. Continental Airlines de Mexico, S.A. is 99.9997% owned by United Airlines, Inc. and .0003% owned by private entities. UAL Benefits Management, Inc. has 100% of its Class A Common Stock owned by United Airlines, Inc. and 100% of its Class B Common Stock owned by Health Care Services Corporation. United Airlines Business Services

Private Limited is 99.99% owned by United Airlines, Inc. and 0.01% owned by UABSPL Holdings, Inc. on behalf of United Airlines, Inc.
*** 1 special share in Mileage Plus Intellectual Property Assets, Ltd. is held by a third party share trustee
**** Mileage Plus Intellectual Property Assets SPV Partner, Ltd. is a wholly owned subsidiary of Mileage Plus Intellectual Property Assets, Ltd.
***** Mileage Plus Intellectual Property Assets Lux 1 SCS is 4.76% owned by Mileage Plus Intellectual Property Assets GP S.à r.l. and 95.23% owned by Mileage Plus Intellectual Property Assets Lux 2 SCS, which itself is 4.76% owned by Mileage Plus Intellectual Property Assets GP S.à r.l. and 95.23% owned by Mileage Plus Intellectual Property Assets, Ltd.
****** Mileage Plus Intellectual Property Assets Aggregator, Ltd. is 60% owned by Mileage Plus Intellectual Property Assets Holdings MIP, Ltd. and 40% owned by Mileage Plus Intellectual Property Assets Holdings UIP, Ltd.