Exhibit 99.1

News Release United Airlines Worldwide Media Relations 872.825.8640 media.relations@united.com

United Airlines to Hold Live Webcast of

Second-Quarter 2018 Financial Results

Route Impairment Special Charge to be recorded for Second Quarter 2018

CHICAGO, July 6, 2018– United Airlines will hold a conference call to discuss second-quarter 2018 financial results on Wednesday, July 18, at 9:30 a.m. CT/10:30 a.m. ET. A live, listen-only webcast of the conference call will be available at ir.united.com. The company will issue its second-quarter financial results and third-quarter investor update after market close on Tuesday, July 17.

The webcast will be available for replay within 24 hours of the conference call and then archived on the website for three months.

Impairment of Brazil Routes

For second quarter 2018, the company expects to record a special non-cash impairment charge of $105 million ($82 million net of taxes) associated with its Brazil routes. In May 2018, the Brazil–United States open skies agreement was ratified, which provides air carriers with unrestricted access between the United States and Brazil. The company determined that the approval of the open skies agreement impaired the entire value of its Brazil route authorities because the agreement removes all limitations or reciprocity requirements for flights between the United States and Brazil. Accordingly, the company expects to record this special charge to write off the entire value of the intangible asset associated with its Brazil routes. This asset is not part of any collateral pledged against any of the company's borrowings.

About United

United Airlines and United Express operate approximately 4,600 flights a day to 357 airports across five continents. In 2017, United and United Express operated more than 1.6 million flights carrying more than 148 million customers. United is proud to have the world's most comprehensive route network, including U.S. mainland hubs in Chicago, Denver, Houston, Los Angeles, Newark/New York, San Francisco and Washington, D.C. United operates 757 mainline aircraft and the airline's United Express carriers operate 551 regional aircraft. The airline is a founding member of Star Alliance, which provides service to 193 countries via 28 member airlines. For more information, visit united.com, follow @United on Twitter or connect on Facebook. The common stock of United's parent, United Continental Holdings, Inc., is traded on the NYSE under the symbol "UAL".

Safe Harbor Statement under the Private Securities Litigation Reform Act of 1995:

Certain statements included in this release are forward-looking and thus reflect our current expectations and beliefs with respect to certain current and future events and anticipated financial and operating performance. Such forward-looking statements are and will be subject to many risks and uncertainties relating to our operations and business environment that may cause actual results to differ materially from any future results expressed or implied in such forward-looking statements. Words such as "expects," "will," "plans," "anticipates," "indicates," "believes," "estimates," "forecast," "guidance," "outlook," "goals" and similar expressions are intended to identify forward-looking statements. Additionally, forward-looking statements include statements that do not relate solely to historical facts, such as statements which identify uncertainties or trends, discuss the possible future effects of current known trends or uncertainties, or which indicate that the future effects of known trends or uncertainties cannot be predicted, guaranteed or assured. All forward-looking statements in this release are based upon information available to us on the date of this release. We undertake no obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future events, changed circumstances or otherwise, except as required by applicable law. Our actual results could differ materially from these forward-looking statements due to numerous factors including, without limitation, the following: general economic conditions (including interest rates, foreign currency exchange rates, investment or credit market conditions, crude oil prices, costs of aircraft fuel and energy refining capacity in relevant markets); economic and political instability and other risks of doing business globally, including political developments that may impact our operations in certain countries; demand for travel and the impact that global economic and political conditions have on customer travel patterns; competitive pressures on pricing and on demand; demand for

transportation in the markets in which we operate; our capacity decisions and the capacity decisions of our competitors; the effects of any hostilities, act of war or terrorist attack; the effects of any technology failures or cybersecurity breaches; the impact of regulatory, investigative and legal proceedings and legal compliance risks; disruptions to our regional network; the ability of other air carriers with whom we have alliances or partnerships to provide the services contemplated by the respective arrangements with such carriers; costs associated with any modification or termination of our aircraft orders; potential reputational or other impact from adverse events in our operations, the operations of our regional carriers or the operations of our code share partners; our ability to attract and retain customers; our ability to execute our operational plans and revenue-generating initiatives, including optimizing our revenue; our ability to control our costs, including realizing benefits from our resource optimization efforts, cost reduction initiatives and fleet replacement programs; the impact of any management changes; our ability to cost-effectively hedge against increases in the price of aircraft fuel if we decide to do so; any potential realized or unrealized gains or losses related to any fuel or currency hedging programs; labor costs; our ability to maintain satisfactory labor relations and the results of any collective bargaining agreement process with our union groups; any disruptions to operations due to any potential actions by our labor groups; an outbreak of a disease that affects travel demand or travel behavior; U.S. or foreign governmental legislation, regulation and other actions (including Open Skies agreements and environmental regulations); industry consolidation or changes in airline alliances; our ability to comply with the terms of our various financing arrangements; the costs and availability of financing; our ability to maintain adequate liquidity; the costs and availability of aviation and other insurance; weather conditions; our ability to utilize our net operating losses to offset future taxable income; the impact of changes in tax laws; the success of our investments in airlines in other parts of the world; and other risks and uncertainties set forth under Part I, Item 1A., "Risk Factors," of our Annual Report on Form 10-K for the fiscal year ended December 31, 2017, as well as other risks and uncertainties set forth from time to time in the reports we file with the U.S. Securities and Exchange Commission.