United Airlines 10-K 2017 FY Annual report

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the following Registration Statements:

(1) Registration Statement (FormS-3No. 333-221865),

(2) Registration Statement (FormS-4No. 333-167801),

(3) Registration Statement (FormS-8No. 333-197815),

(4) Registration Statement (FormS-8No. 333-151778),

(5) Registration Statement (FormS-8No. 333-131434),

(6) Registration Statement (FormS-8No. 333-218637),

of our reports dated February 22, 2018, with respect to the consolidated financial statements and schedule of United Continental Holdings, Inc. and the effectiveness of internal control over financial reporting of United Continental Holdings, Inc., included in this Annual Report (Form10-K) of United Continental Holdings, Inc. for the year ended December 31, 2017.

/s/ Ernst & Young LLP

Chicago, Illinois

February 22, 2018