Exhibit 21

United Continental Holdings, Inc. and United Airlines, Inc. Subsidiaries

(as of February 18, 2016)

Entity	Jurisdiction of Incorporation
United Continental Holdings, Inc.	Delaware
Wholly-owned subsidiaries*:
United Airlines, Inc.	Delaware
•     Air Wis Services, Inc.	Wisconsin
•     Air Wisconsin, Inc.	Delaware
•     Domicile Management Services, Inc. **	Delaware
•     Air Micronesia, Inc.	Delaware
•     Continental Micronesia, Inc.	Delaware
•     CAL Cargo, S.A. de C.V.**	Mexico
•     CALFINCO Inc.	Delaware
•     Century Casualty Company	Vermont
•     Continental Airlines de Mexico, S.A.**	Mexico
•     Continental Airlines Domain Name Limited	England
•     Continental Airlines Finance Trust II	Delaware
•     Continental Airlines Fuel Purchasing Group, LLC	Delaware
•     Continental Airlines, Inc. Supplemental Retirement Plan for Pilots Trust Agreement	Delaware
•     Continental Airlines Purchasing Holdings LLC	Delaware
•     Continental Airlines Purchasing Services LLC**	Delaware
•     Continental Express, Inc.	Delaware
•     Covia LLC**	Delaware
•     Mileage Plus Holdings, LLC	Delaware
•     MPH I, Inc.	Delaware
•     Mileage Plus Marketing, Inc.	Delaware
•     Mileage Plus, Inc.	Delaware
•     Presidents Club of Guam, Inc.	Delaware
•     United Aviation Fuels Corporation	Delaware
•     United Airlines Business Private Services Limited**	India
•     United Ground Express, Inc.	Delaware
•     United Vacations, Inc.	Delaware
•     UAL Benefits Management, Inc.	Delaware

* Subsidiaries of United Continental 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. Continental Airlines Purchasing Services LLC is 99% owned by Continental Airlines Purchasing Holdings LLC and 1% owned by United Airlines, Inc. Covia LLC currently owns an approximately 56% equity interest in the Galileo Japan Partnership, a Delaware general partnership. United Airlines Business Private Services Limited is 99.99% owned by United Airlines, Inc. and 0.01% owned by David Kinzelman, on behalf of United Airlines, Inc.